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<chapter id="administration">
  <title>Administering Bugzilla</title>

  <section id="parameters">
    <title>Bugzilla Configuration</title>

    <para>
      Bugzilla is configured by changing various parameters, accessed
      from the "Edit parameters" link in the page footer. Here are
      some of the key parameters on that page. You should run down this
      list and set them appropriately after installing Bugzilla.
    </para>

    <indexterm>
      <primary>checklist</primary>
    </indexterm>

    <procedure>
      <step>
        <para> 
          <command>maintainer</command>:

          The maintainer parameter is the email address of the person 
          responsible for maintaining this Bugzilla installation.
          The address need not be that of a valid Bugzilla account.
        </para>
      </step>

      <step>
        <para>
          <command>urlbase</command>:

          This parameter defines the fully qualified domain name and web 
          server path to your Bugzilla installation.
        </para>

        <para>
          For example, if your Bugzilla query page is
          <filename>http://www.foo.com/bugzilla/query.cgi</filename>, 
          set your <quote>urlbase</quote>
          to <filename>http://www.foo.com/bugzilla/</filename>.
        </para>
      </step>

      <step>
        <para>
          <command>usebuggroups</command>:

          This dictates whether or not to implement group-based security for
          Bugzilla. If set, Bugzilla bugs can have an associated 'group',
          defining which users are allowed to see and edit the
          bug.
        </para>

        <para>
          Set <quote>usebuggroups</quote> to <quote>on</quote>
          <emphasis>only</emphasis> if you may wish to restrict access
          to particular bugs to certain groups of users. I suggest leaving
          this parameter <emphasis>off</emphasis>
          while initially testing your Bugzilla.
        </para>

        <para>
          For more information see <xref linkend="groups"/>.
        </para>
      </step>

      <step>
        <para>
          <command>usebuggroupsentry</command>:

          Bugzilla Products can have a group associated with them, so that
          certain users can only see bugs in certain products. When this
          parameter is set to <quote>on</quote>, this places all
          newly-created bugs in the group for their product immediately.
        </para>
      </step>

      <step>
        <para>
          <command>shadowdb</command>:

          You run into an interesting problem when Bugzilla reaches a
          high level of continuous activity. MySQL supports only table-level
          write locking. What this means is that if someone needs to make a
          change to a bug, they will lock the entire table until the operation
          is complete. Locking for write also blocks reads until the write is
          complete. Note that more recent versions of mysql support row level
          locking using different table types. These types are slower than the
          standard type, and Bugzilla does not yet take advantage of features
          such as transactions which would justify this speed decrease. The
          Bugzilla team are, however, happy to hear about any experiences with
          row level locking and Bugzilla.
        </para>

        <para>
          The <quote>shadowdb</quote> parameter was designed to get around
          this limitation. While only a single user is allowed to write to
          a table at a time, reads can continue unimpeded on a read-only
          shadow copy of the database. Although your database size will
          double, a shadow database can cause an enormous performance
          improvement when implemented on extremely high-traffic Bugzilla
          databases.
        </para>
        
        <para>
          As a guide, on reasonably old hardware, mozilla.org began needing 
          <quote>shadowdb</quote> when they reached around 40,000 Bugzilla
          users with several hundred Bugzilla bug changes and comments per day.
        </para>

        <para>
          The value of the parameter defines the name of the shadow bug
          database. Set "shadowdb" to e.g. "bug_shadowdb" if you will be
          running a *very* large installation of Bugzilla.
        </para>

        <note>
          <para>
            Enabling "shadowdb" can adversely affect the stability of your
            installation of Bugzilla. You should regularly check that your
            database is in sync. It is often advisable to force a shadow
            database sync nightly via <quote>cron</quote>.
          </para>
        </note>
        
        <para>
          If you use the <quote>shadowdb</quote> option, it is only natural
          that you should turn the <quote>queryagainstshadowdb</quote>
          option on as well. Otherwise you are replicating data into a shadow
          database for no reason!
        </para>
      </step>

      <step>
        <para>
          <command>shutdownhtml</command>:

          If you need to shut down Bugzilla to perform administration, enter
          some descriptive text (with embedded HTML codes, if you'd like)
          into this box. Anyone who tries to use Bugzilla (including admins)
          will receive a page displaying this text. Users can neither log in
          nor log out while shutdownhtml is enabled.
        </para>

        <note>
          <para>
            Although regular log-in capability is disabled while 'shutdownhtml'
            is enabled, safeguards are in place to protect the unfortunate 
            admin who loses connection to Bugzilla. Should this happen to you,
            go directly to the <filename>editparams.cgi</filename> (by typing
            the URL in manually, if necessary). Doing this will prompt you to
            log in, and your name/password will be accepted here (but nowhere
            else). 
          </para>
        </note>
      </step>

      <step>
        <para>
          <command>passwordmail</command>:

          Every time a user creates an account, the text of
          this parameter (with substitutions) is sent to the new user along with
          their password message.
        </para>

        <para>
          Add any text you wish to the "passwordmail" parameter box. For
          instance, many people choose to use this box to give a quick training
          blurb about how to use Bugzilla at your site.
        </para>
      </step>

      <step>
        <para>
          <command>movebugs</command>:

          This option is an undocumented feature to allow moving bugs
          between separate Bugzilla installations.  You will need to understand
          the source code in order to use this feature.  Please consult
          <filename>movebugs.pl</filename> in your Bugzilla source tree for
          further documentation, such as it is.
        </para>
      </step>

      <step>
        <para>
          <command>useqacontact</command>:

          This allows you to define an email address for each component,
          in addition to that of the default owner, who will be sent
          carbon copies of incoming bugs.
        </para>
      </step>

      <step>
        <para>
          <command>usestatuswhiteboard</command>:

          This defines whether you wish to have a free-form, overwritable field
          associated with each bug. The advantage of the Status Whiteboard is
          that it can be deleted or modified with ease, and provides an
          easily-searchable field for indexing some bugs that have some trait
          in common.         
        </para>
      </step>

      <step>
        <para>
          <command>whinedays</command>:

          Set this to the number of days you want to let bugs go
          in the NEW or REOPENED state before notifying people they have
          untouched new bugs. If you do not plan to use this feature, simply do
          not set up the whining cron job described in the installation
          instructions, or set this value to "0" (never whine).
        </para>
      </step>

      <step>
        <para>
          <command>commenton*</command>:

          All these fields allow you to dictate what changes can pass
          without comment, and which must have a comment from the
          person who changed them.  Often, administrators will allow
          users to add themselves to the CC list, accept bugs, or
          change the Status Whiteboard without adding a comment as to
          their reasons for the change, yet require that most other
          changes come with an explanation.
        </para>

        <para>
          Set the "commenton" options according to your site policy. It
          is a wise idea to require comments when users resolve, reassign, or
          reopen bugs at the very least. 
        </para>

        <note>
          <para>
            It is generally far better to require a developer comment
            when resolving bugs than not. Few things are more annoying to bug
            database users than having a developer mark a bug "fixed" without
            any comment as to what the fix was (or even that it was truly
            fixed!)
          </para>
        </note>
      </step>

      <step>
        <para>
          <command>supportwatchers</command>:

          Turning on this option allows users to ask to receive copies 
          of bug mail sent to another user.  Watching a user with
          different group permissions is not a way to 'get around' the
          system; copied emails are still subject to the normal groupset
          permissions of a bug, and <quote>watchers</quote> will only be 
          copied on emails from bugs they would normally be allowed to view. 
        </para>
      </step>
    </procedure>
  </section>

  <section id="useradmin">
    <title>User Administration</title>

    <section id="defaultuser">
      <title>Creating the Default User</title>

      <para>When you first run checksetup.pl after installing Bugzilla, it
      will prompt you for the administrative username (email address) and
      password for this "super user". If for some reason you delete
      the "super user" account, re-running checksetup.pl will again prompt
      you for this username and password.</para>

      <tip>
        <para>If you wish to add more administrative users, you must use the
        MySQL interface. Run "mysql" from the command line, and use these
        commands: 
        <simplelist>
          <member>
            <prompt>mysql&gt;</prompt>
            <command>use bugs;</command>
          </member>

          <member>
            <prompt>mysql&gt;</prompt>

            <command>
              update profiles set groupset=0x7fffffffffffffff where login_name =
              "(user's login name)";
            </command>
          </member>
        </simplelist>
        </para>

        <para>Yes, that is 
        <emphasis>fifteen</emphasis>

        <quote>f</quote>

        's. A whole lot of f-ing going on if you want to create a new
        administator.</para>
      </tip>
    </section>

    <section id="manageusers">
      <title>Managing Other Users</title>

      <section id="createnewusers">
        <title>Creating new users</title>

        <para>Your users can create their own user accounts by clicking the
        "New Account" link at the bottom of each page (assuming they
        aren't logged in as someone else already.) However, should you
        desire to create user accounts ahead of time, here is how you do
        it.</para>

        <orderedlist>
          <listitem>
            <para>After logging in, click the "Users" link at the footer of
            the query page, and then click "Add a new user".</para>
          </listitem>

          <listitem>
            <para>Fill out the form presented. This page is self-explanatory.
            When done, click "Submit".</para>

            <note>
              <para>Adding a user this way will 
              <emphasis>not</emphasis>

              send an email informing them of their username and password.
              While useful for creating dummy accounts (watchers which
              shuttle mail to another system, for instance, or email
              addresses which are a mailing list), in general it is
              preferable to log out and use the 
              <quote>New Account</quote>

              button to create users, as it will pre-populate all the
              required fields and also notify the user of her account name
              and password.</para>
            </note>
          </listitem>
        </orderedlist>
      </section>

      <section id="modifyusers">
        <title>Modifying Users</title>

        <para>To see a specific user, search for their login name
        in the box provided on the "Edit Users" page. To see all users, 
        leave the box blank.</para>

        <para>You can search in different ways the listbox to the right
        of the text entry box. You can match by 
        case-insensitive substring (the default),
        regular expression, or a 
        <emphasis>reverse</emphasis>
        regular expression match, which finds every user name which does NOT
        match the regular expression. (Please see
        the <command>man regexp</command>
        manual page for details on regular expression syntax.)
        </para>

        <para>Once you have found your user, you can change the following
        fields:</para>

        <itemizedlist>
          <listitem>
            <para>
            <emphasis>Login Name</emphasis>: 
            This is generally the user's full email address. However, if you
            have are using the emailsuffix Param, this may just be the user's
            login name. Note that users can now change their login names
            themselves (to any valid email address.)
            </para>
          </listitem>

          <listitem>
            <para>
            <emphasis>Real Name</emphasis>: The user's real name. Note that
            Bugzilla does not require this to create an account.</para>
          </listitem>

          <listitem>
            <para>
            <emphasis>Password</emphasis>: 
            You can change the user's password here. Users can automatically
            request a new password, so you shouldn't need to do this often.
            If you want to disable an account, see Disable Text below.
            </para>
          </listitem>

          <listitem>
            <para>
              <emphasis>Disable Text</emphasis>: 
              If you type anything in this box, including just a space, the
              user is prevented from logging in, or making any changes to 
              bugs via the web interface. 
              The HTML you type in this box is presented to the user when
              they attempt to perform these actions, and should explain
              why the account was disabled.
            </para>
            <para>
              Users with disabled accounts will continue to receive
              mail from Bugzilla; furthermore, they will not be able
              to log in themselves to change their own preferences and
              stop it. If you want an account (disabled or active) to
              stop receiving mail, add the account name (one account
              per line) to the file <filename>data/nomail</filename>.
            </para>
            <note>
              <para>
                Even users whose accounts have been disabled can still
                submit bugs via the e-mail gateway, if one exists.
                The e-mail gateway should <emphasis>not</emphasis> be
                enabled for secure installations of Bugzilla.
              </para>
            </note>
            <warning>
              <para>
                Don't disable all the administrator accounts!
              </para>
            </warning>
          </listitem>

          <listitem>
            <para>
            <emphasis>&lt;groupname&gt;</emphasis>: 
            If you have created some groups, e.g. "securitysensitive", then
            checkboxes will appear here to allow you to add users to, or
            remove them from, these groups.
            </para>
          </listitem>

          <listitem>
            <para>
            <emphasis>canconfirm</emphasis>: 
            This field is only used if you have enabled the "unconfirmed"
            status. If you enable this for a user,
            that user can then move bugs from "Unconfirmed" to a "Confirmed"
            status (e.g.: "New" status).</para>
          </listitem>

          <listitem>
            <para>
            <emphasis>creategroups</emphasis>: 
            This option will allow a user to create and destroy groups in
            Bugzilla.</para>
          </listitem>

          <listitem>
            <para>
            <emphasis>editbugs</emphasis>: 
            Unless a user has this bit set, they can only edit those bugs
            for which they are the assignee or the reporter. Even if this
            option is unchecked, users can still add comments to bugs.
            </para>
          </listitem>

          <listitem>
            <para>
            <emphasis>editcomponents</emphasis>: 
            This flag allows a user to create new products and components,
            as well as modify and destroy those that have no bugs associated
            with them. If a product or component has bugs associated with it,
            those bugs must be moved to a different product or component
            before Bugzilla will allow them to be destroyed.
            </para>
          </listitem>

          <listitem>
            <para>
            <emphasis>editkeywords</emphasis>: 
            If you use Bugzilla's keyword functionality, enabling this
            feature allows a user to create and destroy keywords. As always,
            the keywords for existing bugs containing the keyword the user
            wishes to destroy must be changed before Bugzilla will allow it
            to die.</para>
          </listitem>

          <listitem>
            <para>
            <emphasis>editusers</emphasis>: 
            This flag allows a user to do what you're doing right now: edit
            other users. This will allow those with the right to do so to
            remove administrator privileges from other users or grant them to
            themselves. Enable with care.</para>
          </listitem>


          <listitem>
            <para>
            <emphasis>tweakparams</emphasis>: 
            This flag allows a user to change Bugzilla's Params 
            (using <filename>editparams.cgi</filename>.)</para>
          </listitem>

          <listitem>
            <para>
            <emphasis>&lt;productname&gt;</emphasis>: 
            This allows an administrator to specify the products in which 
            a user can see bugs. The user must still have the 
            "editbugs" privilege to edit bugs in these products.</para>
          </listitem>
        </itemizedlist>
      </section>
    </section>
  </section>

  <section id="programadmin">
    <title>Product, Component, Milestone, and Version Administration</title>

    <section id="products">
      <title>Products</title>

      <para>
      <glossterm linkend="gloss-product" baseform="product">
      Products</glossterm>

      are the broadest category in Bugzilla, and tend to represent real-world
      shipping products. E.g. if your company makes computer games, 
      you should have one product per game, perhaps a "Common" product for 
      units of technology used in multiple games, and maybe a few special
       products (Website, Administration...)</para>

      <para>Many of Bugzilla's settings are configurable on a per-product
      basis. The number of "votes" available to users is set per-product, 
      as is the number of votes
      required to move a bug automatically from the UNCONFIRMED status to the
      NEW status.</para>

      <para>To create a new product:</para>

      <orderedlist>
        <listitem>
          <para>Select "products" from the footer</para>

        </listitem>

        <listitem>
          <para>Select the "Add" link in the bottom right</para>
        </listitem>

        <listitem>
          <para>Enter the name of the product and a description. The
          Description field may contain HTML.</para>
        </listitem>
      </orderedlist>

      <para>Don't worry about the "Closed for bug entry", "Maximum Votes
      per person", "Maximum votes a person can put on a single bug",
      "Number of votes a bug in this Product needs to automatically get out
      of the UNCOMFIRMED state", and "Version" options yet. We'll cover
      those in a few moments.
      </para>
    </section>

    <section id="components">
      <title>Components</title>

      <para>Components are subsections of a Product. E.g. the computer game 
      you are designing may have a "UI"
      component, an "API" component, a "Sound System" component, and a
      "Plugins" component, each overseen by a different programmer. It
      often makes sense to divide Components in Bugzilla according to the
      natural divisions of responsibility within your Product or
      company.</para>
      
      <para>
      Each component has a owner and (if you turned it on in the parameters),
      a QA Contact. The owner should be the primary person who fixes bugs in
      that component. The QA Contact should be the person who will ensure
      these bugs are completely fixed. The Owner, QA Contact, and Reporter
      will get email when new bugs are created in this Component and when
      these bugs change. Default Owner and Default QA Contact fields only
      dictate the 
      <emphasis>default assignments</emphasis>; 
      these can be changed on bug submission, or at any later point in
      a bug's life.</para>

      <para>To create a new Component:</para>

      <orderedlist>
        <listitem>
          <para>Select the "Edit components" link from the "Edit product"
          page</para>
        </listitem>

        <listitem>
          <para>Select the "Add" link in the bottom right.</para>
        </listitem>

        <listitem>
          <para>Fill out the "Component" field, a short "Description", 
          the "Initial Owner" and "Initial QA Contact" (if enabled.) 
          The Component and Description fields may contain HTML; 
          the "Initial Owner" field must be a login name
          already existing in the database. 
          </para>
        </listitem>
      </orderedlist>
    </section>

    <section id="versions">
      <title>Versions</title>

      <para>Versions are the revisions of the product, such as "Flinders
      3.1", "Flinders 95", and "Flinders 2000". Version is not a multi-select
      field; the usual practice is to select the most recent version with
      the bug.
      </para>

      <para>To create and edit Versions:</para>

      <orderedlist>
        <listitem>
          <para>From the "Edit product" screen, select "Edit Versions"</para>
        </listitem>

        <listitem>
          <para>You will notice that the product already has the default
          version "undefined". Click the "Add" link in the bottom right.</para>
        </listitem>

        <listitem>
          <para>Enter the name of the Version. This field takes text only. 
          Then click the "Add" button.</para>
        </listitem>

      </orderedlist>
    </section>

    <section id="milestones">
      <title>Milestones</title>

      <para>Milestones are "targets" that you plan to get a bug fixed by. For
      example, you have a bug that you plan to fix for your 3.0 release, it
      would be assigned the milestone of 3.0.</para>

      <note>
        <para>Milestone options will only appear for a Product if you turned
        on the "usetargetmilestone" Param in the "Edit Parameters" screen.
        </para>
      </note>

      <para>To create new Milestones, set Default Milestones, and set
      Milestone URL:</para>

      <orderedlist>
        <listitem>
          <para>Select "Edit milestones" from the "Edit product" page.</para>
        </listitem>

        <listitem>
          <para>Select "Add" in the bottom right corner.
          text</para>
        </listitem>

        <listitem>
          <para>Enter the name of the Milestone in the "Milestone" field. You
          can optionally set the "sortkey", which is a positive or negative
          number (-255 to 255) that defines where in the list this particular
          milestone appears. This is because milestones often do not 
          occur in alphanumeric order For example, "Future" might be
          after "Release 1.2". Select "Add".</para>
        </listitem>

        <listitem>
          <para>From the Edit product screen, you can enter the URL of a 
          page which gives information about your milestones and what
          they mean. </para>

        <tip>
          <para>If you want your milestone document to be restricted so
          that it can only be viewed by people in a particular Bugzilla
          group, the best way is to attach the document to a bug in that
          group, and make the URL the URL of that attachment.</para>
        </tip>
        </listitem>
      </orderedlist>
    </section>
  </section>
  
  <section id="voting">
    <title>Voting</title>

    <para>Voting allows users to be given a pot of votes which they can allocate
    to bugs, to indicate that they'd like them fixed. 
    This allows developers to gauge
    user need for a particular enhancement or bugfix. By allowing bugs with
    a certain number of votes to automatically move from "UNCONFIRMED" to
    "NEW", users of the bug system can help high-priority bugs garner
    attention so they don't sit for a long time awaiting triage.</para>

    <para>To modify Voting settings:</para>

    <orderedlist>
      <listitem>
        <para>Navigate to the "Edit product" screen for the Product you
        wish to modify</para>
      </listitem>

      <listitem>
        <para><emphasis>Maximum Votes per person</emphasis>:
        Setting this field to "0" disables voting.</para>
      </listitem>

      <listitem>
        <para><emphasis>Maximum Votes a person can put on a single
         bug"</emphasis>: 
         It should probably be some number lower than the
        "Maximum votes per person". Don't set this field to "0" if
        "Maximum votes per person" is non-zero; that doesn't make
        any sense.</para>
      </listitem>

      <listitem>
        <para><emphasis>Number of votes a bug in this product needs to
        automatically get out of the UNCONFIRMED state</emphasis>: 
        Setting this field to "0" disables the automatic move of
        bugs from UNCONFIRMED to NEW. 
        </para>
      </listitem>

      <listitem>
        <para>Once you have adjusted the values to your preference, click
        "Update".</para>
      </listitem>
    </orderedlist>
  </section>

  <section id="groups">
    <title>Groups and Group Security</title>

    <para>Groups allow the administrator
    to isolate bugs or products that should only be seen by certain people.
    There are two types of group - Generic Groups, and Product-Based Groups.
    </para>
    
    <para>
    Product-Based Groups are matched with products, and allow you to restrict
    access to bugs on a per-product basis. They are enabled using the 
    usebuggroups Param. Turning on the usebuggroupsentry
    Param will mean bugs automatically get added to their product group when 
    filed.   
    </para>
    
    <para>
    Generic Groups have no special relationship to products; 
    you create them, and put bugs in them
    as required. One example of the use of Generic Groups 
    is Mozilla's "Security" group,
    into which security-sensitive bugs are placed until fixed. Only the
    Mozilla Security Team are members of this group.
    </para>
    
    <para>To create Generic Groups:</para>

    <orderedlist>
      <listitem>
        <para>Select the "groups"
        link in the footer.</para>
      </listitem>

      <listitem>
        <para>Take a moment to understand the instructions on the "Edit
        Groups" screen, then select the "Add Group" link.</para>
      </listitem>

      <listitem>
        <para>Fill out the "New Name", "New Description", and 
        "New User RegExp" fields. "New User RegExp" allows you to automatically
         place all users who fulfill the Regular Expression into the new group. 
         When you have finished, click "Add".</para>
      </listitem>
    </orderedlist>

    <para>To use Product-Based Groups:</para>

    <orderedlist>
      <listitem>
        <para>Turn on "usebuggroups" and "usebuggroupsentry" in the "Edit
        Parameters" screen.</para>

        <warning>
          <para>XXX is this still true?
          "usebuggroupsentry" has the capacity to prevent the
          administrative user from directly altering bugs because of
          conflicting group permissions. If you plan on using
          "usebuggroupsentry", you should plan on restricting
          administrative account usage to administrative duties only. In
          other words, manage bugs with an unpriveleged user account, and
          manage users, groups, Products, etc. with the administrative
          account.</para>
        </warning>
      </listitem>

      <listitem>
        <para>In future, when you create a Product, a matching group will be
        automatically created. If you need to add a Product Group to
        a Product which was created before you turned on usebuggroups,
        then simply create a new group, as outlined above, with the
        same name as the Product.</para>
      </listitem>
    </orderedlist>

    <warning>
      <para>Bugzilla currently has a limit of 64 groups per installation. If
      you have more than about 50 products, you should consider
      running multiple Bugzillas. Ask in the newsgroup for other
      suggestions for working around this restriction.</para>
    </warning>

    <para>
      Note that group permissions are such that you need to be a member
      of <emphasis>all</emphasis> the groups a bug is in, for whatever
      reason, to see that bug.
    </para>    

    <note>
      <para>
        By default, bugs can also be seen by the Assignee, the Reporter, and 
        by everyone on the CC List, regardless of whether or not the bug would 
        typically be viewable by them. Visibility to the Reporter and CC List can 
        be overridden (on a per-bug basis) by bringing up the bug, finding the 
        section that starts with <quote>Users in the roles selected below...</quote>
        and un-checking the box next to either 'Reporter' or 'CC List' (or both).
      </para>
    </note>
  </section>

  <section id="security">
    <title>Bugzilla Security</title>

    <warning>
      <para>Poorly-configured MySQL and Bugzilla installations have
      given attackers full access to systems in the past. Please take these
      guidelines seriously, even for Bugzilla machines hidden away behind
      your firewall. 80% of all computer trespassers are insiders, not
      anonymous crackers.</para>
    </warning>

    <note>
      <para>These instructions must, of necessity, be somewhat vague since
      Bugzilla runs on so many different platforms. If you have refinements
      of these directions, please submit a bug to &bzg-bugs;.
      </para>
    </note>

    <warning>
      <para>This is not meant to be a comprehensive list of every possible
      security issue regarding the tools mentioned in this section. There is
      no subsitute for reading the information written by the authors of any
      software running on your system.
      </para>
    </warning>

    <section id="security-networking">
      <title>TCP/IP Ports</title>

      <!-- TODO: Make this make sense (TCP/IP) -->
      <para>TCP/IP defines 65,000 some ports for trafic. Of those, Bugzilla
      only needs 1... 2 if you need to use features that require e-mail such
      as bug moving or the e-mail interface from contrib. You should audit
      your server and make sure that you aren't listening on any ports you
      don't need to be. You may also wish to use some kind of firewall
      software to be sure that trafic can only be recieved on ports you
      specify.
      </para>
    </section>

    <section id="security-mysql">
      <title>MySQL</title>

      <para>MySQL ships by default with many settings that should be changed.
      By defaults it allows anybody to connect from localhost without a
      password and have full administrative capabilities. It also defaults to
      not have a root password (this is <emphasis>not</emphasis> the same as
      the system root). Also, many installations default to running
      <application>mysqld</application> as the system root.
      </para>

      <orderedlist>
        <listitem>
          <para>Make sure you are running at least version 3.22.32 of MySQL
          as earlier versions had notable security holes.
          </para>
        </listitem>

        <listitem>
          <para>Consult the documentation that came with your system for
          information on making <application>mysqld</application> run as an
          unprivleged user.
          </para>
        </listitem>

        <listitem>
          <para>You should also be sure to disable the anonymous user account
          and set a password for the root user. This is accomplished using the
          following commands:
          </para>
          <programlisting>
<prompt>bash$</prompt> mysql mysql
<prompt>mysql&gt;</prompt> DELETE FROM user WHERE user = '';
<prompt>mysql&gt;</prompt> UPDATE user SET password = password('<replaceable>new_password</replaceable>') WHERE user = 'root';
<prompt>mysql&gt;</prompt> FLUSH PRIVILEGES;
          </programlisting>
          <para>From this point forward you will need to use
          <command>mysql -u root -p</command> and enter
          <replaceable>new_password</replaceable> when prompted when using the
          mysql client.
          </para>
        </listitem>

        <listitem>
          <para>If you run MySQL on the same machine as your httpd server, you
          should consider disabling networking from within MySQL by adding
          the following to your <filename>/etc/my.cnf</filename>:
          </para>
          <programlisting>
[myslqd]
# Prevent network access to MySQL.
skip-networking
          </programlisting>
        </listitem>

        <listitem>
          <para>You may also consider running MySQL, or even all of Bugzilla
          in a chroot jail; however, instructions for doing that are beyond
          the scope of this document.
          </para>
        </listitem>

      </orderedlist>

    </section>

    <section id="security-daemon">
      <title>Daemon Accounts</title>

      <para>Many daemons, such as Apache's httpd and MySQL's mysqld default to
      running as either <quote>root</quote> or <quote>nobody</quote>. Running
      as <quote>root</quote> introduces obvious security problems, but the
      problems introduced by running everything as <quote>nobody</quote> may
      not be so obvious. Basically, if you're running every daemon as
      <quote>nobody</quote> and one of them gets comprimised, they all get
      comprimised. For this reason it is recommended that you create a user
      account for each daemon.
      </para>

      <note>
        <para>You will need to set the <varname>webservergroup</varname> to
        the group you created for your webserver to run as in
        <filename>localconfig</filename>. This will allow
        <command>./checksetup.pl</command> to better adjust the file
        permissions on your Bugzilla install so as to not require making
        anything world-writable.
        </para>
      </note>

    </section>

    <section id="security-access">
      <title>Web Server Access Controls</title>

      <para>There are many files that are placed in the Bugzilla directory
      area that should not be accessable from the web. Because of the way
      Bugzilla is currently layed out, the list of what should and should
      not be accessible is rather complicated. A new installation method
      is currently in the works which should solve this by allowing files
      that shouldn't be accessible from the web to be placed in directory
      outside the webroot. See
      <ulink url="http://bugzilla.mozilla.org/show_bug.cgi?id=44659">bug
      44659</ulink> for more information.
      </para>

      <itemizedlist spacing="compact">
        <listitem>
          <para>In the main Bugzilla directory, you should:</para>
          <itemizedlist spacing="compact">
            <listitem>
              <para>Block:
              <simplelist type="inline">
                <member><filename>*.pl</filename></member>
                <member><filename>*localconfig*</filename></member>
                <member><filename>runtests.sh</filename></member>
                <member><filename>processmail</filename></member>
                <member><filename>syncshadowdb</filename></member>
              </simplelist>
              </para>
            </listitem>
            <listitem>
              <para>But allow:
              <simplelist type="inline">
                <member><filename>localconfig.js</filename></member>
                <member><filename>localconfig.rdf</filename></member>
              </simplelist>
              </para>
            </listitem>
          </itemizedlist>
        </listitem>

        <listitem>
          <para>In <filename class="directory">data</filename>:</para>
          <itemizedlist spacing="compact">
            <listitem>
              <para>Block everything</para>
            </listitem>
            <listitem>
              <para>But allow:
              <simplelist type="inline">
                <member><filename>duplicates.rdf</filename></member>
              </simplelist>
              </para>
            </listitem>
          </itemizedlist>
        </listitem>

        <listitem>
          <para>In <filename class="directory">data/webdot</filename>:</para>
          <itemizedlist spacing="compact">
            <listitem>
              <para>If you use a remote webdot server:</para>
              <itemizedlist spacing="compact">
                <listitem>
                  <para>Block everything</para>
                </listitem>
                <listitem>
                  <para>But allow
                  <simplelist type="inline">
                    <member><filename>*.dot</filename></member>
                  </simplelist>
                  only for the remote webdot server</para>
                </listitem>
              </itemizedlist>
            </listitem>
            <listitem>
              <para>Otherwise, if you use a local GraphViz:</para>
              <itemizedlist spacing="compact">
                <listitem>
                  <para>Block everything</para>
                </listitem>
                <listitem>
                  <para>But allow:
                  <simplelist type="inline">
                    <member><filename>*.png</filename></member>
                    <member><filename>*.gif</filename></member>
                    <member><filename>*.jpg</filename></member>
                    <member><filename>*.map</filename></member>
                  </simplelist>
                  </para>
                </listitem>
              </itemizedlist>
            </listitem>
            <listitem>
              <para>And if you don't use any dot:</para>
              <itemizedlist spacing="compact">
                <listitem>
                  <para>Block everything</para>
                </listitem>
              </itemizedlist>
            </listitem>
          </itemizedlist>
        </listitem>

        <listitem>
          <para>In <filename class="directory">Bugzilla</filename>:</para>
          <itemizedlist spacing="compact">
            <listitem>
              <para>Block everything</para>
            </listitem>
          </itemizedlist>
        </listitem>

        <listitem>
          <para>In <filename class="directory">template</filename>:</para>
          <itemizedlist spacing="compact">
            <listitem>
              <para>Block everything</para>
            </listitem>
          </itemizedlist>
        </listitem>
      </itemizedlist>

      <tip>
        <para>Bugzilla ships with the ability to generate
        <filename>.htaccess</filename> files instructing Apache which files
        should and should not be accessible.
        </para>
      </tip>

      <para>You should test to make sure that the files mentioned above are
      not accessible from the Internet, especially your
      <filename>localconfig</filename> file which contains your database
      password. To test, simply point your web browser at the file; for
      example, to test mozilla.org's installation, we'd try to access
      <ulink url="http://bugzilla.mozilla.org/localconfig"/>. You should
      get a <errorcode>403</errorcode> <errorname>Forbidden</errorname>
      error.
      </para>

      <caution>
        <para>Not following the instructions in this section, including
        testing, may result in sensitive information being globally
        accessible.
        </para>
      </caution>

    </section>

  </section>

  <section id="cust-templates">
    <title>Template Customisation</title>
    
    <para>
      One of the large changes for 2.16 was the templatisation of the
      entire user-facing UI, using the 
      <ulink url="http://www.template-toolkit.org">Template Toolkit</ulink>.
      Administrators can now configure the look and feel of Bugzilla without
      having to edit Perl files or face the nightmare of massive merge
      conflicts when they upgrade to a newer version in the future.
    </para>
    
    <para>
      Templatisation also makes localised versions of Bugzilla possible, 
      for the first time. In the future, a Bugzilla installation may
      have templates installed for multiple localisations, and select
      which ones to use based on the user's browser language setting.      
    </para>
    
    <section id="template-directory">
      <title>Template Directory Structure</title>
      <para>
        The template directory structure starts with top level directory 
        named <filename>template</filename>, which contains a directory
        for each installed localization. The next level defines the
        language used in the templates. Bugzilla comes with English
        templates, so the directory name is <filename>en</filename>,
        and we will discuss <filename>template/en</filename> throughout
        the documentation. Below <filename>template/en</filename> is the
        <filename>default</filename> directory, which contains all the
        standard templates shipped with Bugzilla.
      </para>

      <warning>
        <para>
          A directory <filename>data/templates</filename> also exists;
          this is where Template Toolkit puts the compiled versions of
          the templates from either the default or custom directories.
          <emphasis>Do not</emphasis> directly edit the files in this
          directory, or all your changes will be lost the next time
          Template Toolkit recompiles the templates.
        </para>
      </warning>
    </section>

    <section id="template-method">
      <title>Choosing a Customization Method</title>
      <para>
        If you want to edit Bugzilla's templates, the first decision
        you must make is how you want to go about doing so. There are two
        choices, and which you use depends mainly on the scope of your 
        modifications, and the method you plan to use to upgrade Bugzilla.
      </para> 

      <para>
        The first method of making customizations is to directly edit the
        templates found in <filename>template/en/default</filename>.
        This is probably the best way to go about it if you are going to
        be upgrading Bugzilla through CVS, because if you then execute
        a <command>cvs update</command>, any changes you have made will
        be merged automagically with the updated versions.
      </para>

      <note>
        <para>
          If you use this method, and CVS conflicts occur during an
          update, the conflicted templates (and possibly other parts
          of your installation) will not work until they are resolved.
        </para>
      </note>

      <para>
        The second method is to copy the templates to be modified
        into a mirrored directory structure under 
        <filename>template/en/custom</filename>. Templates in this
        directory structure automatically override any identically-named
        and identically-located templates in the 
        <filename>default</filename> directory. 
      </para>

      <note>
        <para>
          The <filename>custom</filename> directory does not exist
          at first and must be created if you want to use it.
        </para>
      </note>

      <para>
        The second method of customization should be used if you 
        use the overwriting method of upgrade, because otherwise 
        your changes will be lost.  This method may also be better if
        you are using the CVS method of upgrading and are going to make major
        changes, because it is guaranteed that the contents of this directory
        will not be touched during an upgrade, and you can then decide whether
        to continue using your own templates, or make the effort to merge your
        changes into the new versions by hand.
      </para>

      <para>
        Using this method, your installation may break if incompatible
        changes are made to the template interface.  Such changes should
        be documented in the release notes, provided you are using a
        stable release of Bugzilla.  If you use using unstable code, you will
        need to deal with this one yourself, although if possible the changes
        will be mentioned before they occur in the deprecations section of the
        previous stable release's release notes.
      </para>

      <note>
        <para>
          Regardless of which method you choose, it is recommended that
          you run <command>./checksetup.pl</command> after creating or
          editing any templates in the <filename>template/en/default</filename>
          directory, and after editing any templates in the 
          <filename>custom</filename> directory.
        </para>
      </note>

      <warning>
        <para>
          It is <emphasis>required</emphasis> that you run 
          <command>./checksetup.pl</command> after creating a new
          template in the <filename>custom</filename> directory. Failure
          to do so will raise an incomprehensible error message.
        </para>
      </warning>
    </section>
    
    <section id="template-edit">
      <title>How To Edit Templates</title>
      
      <note>
        <para>
          If you are making template changes that you intend on submitting back
          for inclusion in standard Bugzilla, you should read the relevant
          sections of the 
          <ulink url="http://www.bugzilla.org/docs/developer.html">Developers'
          Guide</ulink>.
        </para>
      </note>
      
     <para>
        The syntax of the Template Toolkit language is beyond the scope of
        this guide. It's reasonably easy to pick up by looking at the current 
        templates; or, you can read the manual, available on the
        <ulink url="http://www.template-toolkit.org">Template Toolkit home
        page</ulink>.
      </para>
      
      <para>
        One thing you should take particular care about is the need
        to properly HTML filter data that has been passed into the template.
        This means that if the data can possibly contain special HTML characters
        such as &lt;, and the data was not intended to be HTML, they need to be
        converted to entity form, ie &amp;lt;.  You use the 'html' filter in the
        Template Toolkit to do this.  If you forget, you may open up
        your installation to cross-site scripting attacks.
      </para>

      <para>
        Also note that Bugzilla adds a few filters of its own, that are not
        in standard Template Toolkit.  In particular, the 'url_quote' filter
        can convert characters that are illegal or have special meaning in URLs,
        such as &amp;, to the encoded form, ie %26.  This actually encodes most
        characters (but not the common ones such as letters and numbers and so
        on), including the HTML-special characters, so there's never a need to
        HTML filter afterwards.
      </para>
 
      <para>
        Editing templates is a good way of doing a <quote>poor man's custom
        fields</quote>. For example, if you don't use the Status Whiteboard,
        but want to have a free-form text entry box for <quote>Build
        Identifier</quote>, then you can just
        edit the templates to change the field labels. It's still be called
        status_whiteboard internally, but your users don't need to know that.
      </para>
      
    </section>
            
    
    <section id="template-formats">
      <title>Template Formats</title>
      
      <para>
        Some CGIs have the ability to use more than one template. For example,
        <filename>buglist.cgi</filename> can output itself as RDF, or as two 
        formats of HTML (complex and simple). If you would like to 
        retrieve a certain format, you can use the &amp;format=&lt;format&gt; 
        (such as simple or complex) in the URL. (Try this out
        by appending <filename>&amp;format=simple</filename> to a buglist.cgi
        URL on your Bugzilla installation.) The mechanism that provides this 
        feature is extensible.
      </para>
      
      <para>
        To see if a CGI supports multiple output formats, grep the
        CGI for <quote>ValidateOutputFormat</quote>. If it's not present,
        adding multiple format support isn't too hard; see how it's done in
        other CGIs.
      </para>
      
      <para>
        To make a new format template for a CGI which supports this, 
        open a current template for
        that CGI and take note of the INTERFACE comment (if present.) This 
        comment defines what variables are passed into this template. If 
        there isn't one, I'm afraid you'll have to read the template and
        the code to find out what information you get. 
      </para>     
  
      <para>
        Write your template in whatever markup or text style is appropriate.
      </para>
      
      <para>
        You now need to decide what content type you want your template
        served as. Open up the <filename>localconfig</filename> file and find the 
        <filename>$contenttypes</filename>
        variable. If your content type is not there, add it. Remember
        the three- or four-letter tag assigned to your content type. 
        This tag will be part of the template filename.
      </para>
      
      <para>
        Save the template as <filename>&lt;stubname&gt;-&lt;formatname&gt;.&lt;contenttypetag&gt;.tmpl</filename>. 
        Try out the template by calling the CGI as 
        <filename>&lt;cginame&gt;.cgi?format=&lt;formatname&gt;</filename> .
      </para>       
    </section>
    
    
    <section>
      <title>Particular Templates</title>
      
      <para>
        There are a few templates you may be particularly interested in
        customising for your installation.
      </para>
      
      <para>
        <command>index.html.tmpl</command>:
        This is the Bugzilla front page.
      </para>      

      <para>
        <command>global/header.html.tmpl</command>:
        This defines the header that goes on all Bugzilla pages.
        The header includes the banner, which is what appears to users
        and is probably what you want to edit instead.  However the
        header also includes the HTML HEAD section, so you could for
        example add a stylesheet or META tag by editing the header.
      </para>

      <para>
        <command>global/banner.html.tmpl</command>:
        This contains the <quote>banner</quote>, the part of the header
        that appears
        at the top of all Bugzilla pages.  The default banner is reasonably
        barren, so you'll probably want to customise this to give your
        installation a distinctive look and feel.  It is recommended you
        preserve the Bugzilla version number in some form so the version 
        you are running can be determined, and users know what docs to read.
      </para>

      <para>
        <command>global/footer.html.tmpl</command>:
        This defines the footer that goes on all Bugzilla pages.  Editing
        this is another way to quickly get a distinctive look and feel for
        your Bugzilla installation.
      </para>

      <para>
        <command>list/table.html.tmpl</command>:
        This template controls the appearance of the bug lists created
        by Bugzilla. Editing this template allows per-column control of
        the width and title of a column, the maximum display length of
        each entry, and the wrap behaviour of long entries.
        For long bug lists, Bugzilla inserts a 'break' every 100 bugs by
        default; this behaviour is also controlled by this template, and
        that value can be modified here.
      </para>

      <para>
        <command>bug/create/user-message.html.tmpl</command>:
        This is a message that appears near the top of the bug reporting page.
        By modifying this, you can tell your users how they should report
        bugs.
      </para>

      <para>
        <command>bug/process/midair.html.tmpl</command>:
        This is the page used if two people submit simultaneous changes to the
        same bug.  The second person to submit their changes will get this page
        to tell them what the first person did, and ask if they wish to
        overwrite those changes or go back and revisit the bug.  The default
        title and header on this page read "Mid-air collision detected!"  If
        you work in the aviation industry, or other environment where this
        might be found offensive (yes, we have true stories of this happening)
        you'll want to change this to something more appropriate for your
        environment.
      </para>
        
      <para>
        <command>bug/create/create.html.tmpl</command> and
        <command>bug/create/comment.txt.tmpl</command>:
        You may not wish to go to the effort of creating custom fields in
        Bugzilla, yet you want to make sure that each bug report contains
        a number of pieces of important information for which there is not
        a special field. The bug entry system has been designed in an
        extensible fashion to enable you to add arbitrary HTML widgets,
        such as drop-down lists or textboxes, to the bug entry page
        and have their values appear formatted in the initial comment.
      </para>
      
      <para>  
        An example of this is the mozilla.org 
        <ulink url="http://landfill.bugzilla.org/bugzilla-tip/enter_bug.cgi?product=WorldControl&amp;format=guided">guided 
        bug submission form</ulink>. The code for this comes with the Bugzilla
        distribution as an example for you to copy. It can be found in the
        files 
        <filename>create-guided.html.tmpl</filename> and
        <filename>comment-guided.html.tmpl</filename>.
      </para>  

      <para>
        So to use this feature, create a custom template for 
        <filename>enter_bug.cgi</filename>. The default template, on which
        you could base it, is 
        <filename>custom/bug/create/create.html.tmpl</filename>.
        Call it <filename>create-&lt;formatname&gt;.html.tmpl</filename>,
        and in it, add widgets for each piece of information you'd like
        collected - such as a build number, or set of steps to reproduce.
      </para>

      <para>
        Then, create a template like 
        <filename>custom/bug/create/comment.txt.tmpl</filename>, and call it 
        <filename>comment-&lt;formatname&gt;.txt.tmpl</filename>. This 
        template should reference the form fields you have created using
        the syntax <filename>[% form.&lt;fieldname&gt; %]</filename>. When a 
        bug report is submitted, the initial comment attached to the bug
        report will be formatted according to the layout of this template.
      </para> 

      <para>
        For example, if your enter_bug template had a field
        <programlisting>&lt;input type="text" name="buildid" size="30"&gt;</programlisting>
        and then your comment.txt.tmpl had
        <programlisting>BuildID: [% form.buildid %]</programlisting>
        then
        <programlisting>BuildID: 20020303</programlisting>
        would appear in the initial checkin comment.
      </para>        
    </section>          
    
  </section>

  <section id="upgrading">
    <title>Upgrading to New Releases</title>

    <para>Upgrading Bugzilla is something we all want to do from time to time,
    be it to get new features or pick up the latest security fix. How easy
    it is to update depends on a few factors.
    </para>

    <itemizedlist>
      <listitem>
        <para>If the new version is a revision or a new point release</para>
      </listitem>
      <listitem>
        <para>How many, if any, local changes have been made</para>
      </listitem>
    </itemizedlist>

    <para>There are also three different methods to upgrade your installation.
    </para>

    <orderedlist>
      <listitem>
        <para>Using CVS (<xref linkend="upgrade-cvs"/>)</para>
      </listitem>
      <listitem>
        <para>Downloading a new tarball (<xref linkend="upgrade-tarball"/>)</para>
      </listitem>
      <listitem>
        <para>Applying the relevant patches (<xref linkend="upgrade-patches"/>)</para>
      </listitem>
    </orderedlist>

    <para>Which options are available to you may depend on how large a jump
    you are making and/or your network configuration.
    </para>

    <para>Revisions are normally released to fix security vulnerabilities
    and are distinguished by an increase in the third number. For example,
    when 2.16.6 was released, it was a revision to 2.16.5.
    </para>

    <para>Point releases are normally released when the Bugzilla team feels
    that there has been a significant amount of progress made between the
    last point release and the current time. These are often proceeded by a
    stabilization period and release candidates, however the use of 
    development versions or release candidates is beyond the scope of this
    document. Point releases can be distinguished by an increase in the
    second number, or minor version. For example, 2.18.0 is a newer point
    release than 2.16.5.
    </para>

    <para>The examples in this section are written as if you were updating
    to version 2.16.6.  The procedures are the same regardless if you are
    updating to a new point release or a new revision.  However, the chance
    of running into trouble increases when upgrading to a new point release,
    escpecially if you've made local changes.
    </para>

    <para>These examples also assume that your Bugzilla installation is at
    <filename>/var/www/html/bugzilla</filename>. If that is not the case,
    simply substitute the proper paths where appropriate.
    </para>

    <example id="upgrade-cvs">
      <title>Upgrading using CVS</title>

      <para>Every release of Bugzilla, whether it is a revision or a point
      release, is tagged in CVS.  Also, every tarball we have distributed
      since version 2.12 has been primed for using CVS. This does, however,
      require that you are able to access cvs-mirror.mozilla.org on port
      2401.

        <tip>
          <para>If you can do this, updating using CVS is probably the most
          painless method, especially if you have a lot of local changes.
          </para>
        </tip>
      </para>

      <programlisting>
bash$ <command>cd /var/www/html/bugzilla</command>
bash$ <command>cvs login</command>
Logging in to :pserver:anonymous@cvs-mirror.mozilla.org:2401/cvsroot
CVS password: <command>anonymous</command>
bash$ <command>cvs -q update -r BUGZILLA-2_16_6 -dP</command>
P checksetup.pl
P collectstats.pl
P globals.pl
P docs/rel_notes.txt
P template/en/default/list/quips.html.tmpl
      </programlisting>

      <para>
        <caution>
          <para>If a line in the output from <command>cvs update</command>
          begins with a <computeroutput>C</computeroutput> that represents a
          file with local changes that CVS was unable to properly merge. You
          need to resolve these conflicts manually before Bugzilla (or at
          least the portion using that file) will be usable.
          </para>
        </caution>

        <note>
          <para>You also need to run <command>./checksetup.pl</command>
          before your Bugzilla upgrade will be complete.
          </para>
        </note>
      </para>
    </example>

    <example id="upgrade-tarball">
      <title>Upgrading using the tarball</title>

      <para>If you are unable or unwilling to use CVS, another option that's
      always available is to download the latest tarball. This is the most
      difficult option to use, especially if you have local changes.
      </para>

      <programlisting>
bash$ <command>cd /var/www/html</command>
bash$ <command>wget ftp://ftp.mozilla.org/pub/mozilla.org/webtools/bugzilla-2.16.6.tar.gz</command>
<emphasis>Output omitted</emphasis>
bash$ <command>tar xzvf bugzilla-2.16.6.tar.gz</command>
bugzilla-2.16.6/
bugzilla-2.16.6/.cvsignore
bugzilla-2.16.6/1x1.gif
<emphasis>Output truncated</emphasis>
bash$ <command>cd bugzilla-2.16.6</command>
bash$ <command>cp ../bugzilla/localconfig* .</command>
bash$ <command>cp -r ../bugzilla/data .</command>
bash$ <command>cd ..</command>
bash$ <command>mv bugzilla bugzilla.old</command>
bash$ <command>mv bugzilla-2.16.6 bugzilla</command>
bash$ <command>cd bugzilla</command>
bash$ <command>./checksetup.pl</command>
<emphasis>Output omitted</emphasis>
      </programlisting>

      <para>
        <warning>
          <para>The <command>cp</command> commands both end with periods which
          is a very important detail, it tells the shell that the destination
          directory is the current working directory. Also, the period at the
          beginning of the <command>./checksetup.pl</command> is important and
          can not be omitted.
          </para>
        </warning>

        <note>
          <para>You will now have to reapply any changes you have made to your
          local installation manually.
          </para>
        </note>
      </para>
    </example>

    <example id="upgrade-patches">
      <title>Upgrading using patches</title>

      <para>The Bugzilla team will normally make a patch file available for
      revisions to go from the most recent revision to the new one. You could
      also read the release notes and grab the patches attached to the
      mentioned bug, but it is safer to use the released patch file as
      sometimes patches get changed before they get checked in (for minor
      spelling fixes and the like). It is also theorectically possible to
      scour the fixed bug list and pick and choose which patches to apply
      from a point release, but this is not recommended either as what you'll
      end up with is a hodge podge Bugzilla that isn't really any version.
      This would also make it more difficult to upgrade in the future.
      </para>

      <programlisting>
bash$ <command>cd /var/www/html/bugzilla</command>
bash$ <command>wget ftp://ftp.mozilla.org/pub/mozilla.org/webtools/bugzilla-2.16.5-to-2.16.6.diff.gz</command>
<emphasis>Output omitted</emphasis>
bash$ <command>gunzip bugzilla-2.16.5-to-2.16.6.diff.gz</command>
bash$ <command>patch -p1 &lt; bugzilla-2.16.5-to-2.16.6.diff</command>
patching file checksetup.pl
patching file collectstats.pl
patching file globals.pl
      </programlisting>

      <para>
        <caution>
          <para>If you do this, beware that this doesn't change the entires in
          your <filename id="dir">CVS</filename> directory so it may make
          updates using CVS (<xref linkend="upgrade-cvs"/>) more difficult in the
          future.
          </para>
        </caution>
      </para>
    </example>

  </section>

  <!-- Integrating Bugzilla with Third-Party Tools -->
  &integration;

</chapter>

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