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<h2><a name="SECTION001210000000000000000">
2.1 Add the group and user</a>
</h2>
<p>
Mailman requires a unique user and group name which will own its files, and
under which its processes will run. Mailman's basic security is based on
group ownership permissions, so it's important to get this step
right<a name="tex2html1"
href="#foot38"><sup>1</sup></a>. Typically, you will add a new user and a new
group, both called <code>mailman</code>. The <code>mailman</code> user must be a member
of the <code>mailman</code> group. Mailman will be installed under the
<code>mailman</code> user and group, with the set-group-id (setgid) bit enabled.
<p>
If these names are already in use, you can choose different user and group
names, as long as you remember these when you run <b class="program">configure</b>. If you
choose a different unique user name, you will have to specify this with
<b class="program">configure</b>'s <b class="programopt">--with-username</b> option, and if you choose
a different group name, you will have to specify this with
<b class="program">configure</b>'s <b class="programopt">--with-groupname</b> option.
<p>
On Linux systems, you can use the following commands to create these
accounts. Check your system's manual pages for details:
<p>
<div class="verbatim"><pre>
% groupadd mailman
% useradd -c''GNU Mailman'' -s /no/shell -d /no/home -g mailman mailman
</pre></div>
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<br><hr><h4>Footnotes</h4>
<dl>
<dt><a name="foot38">...
right</a><A
HREF="node4.html#tex2html1"><sup>1</sup></a></dt>
<dd>You will be able to check and repair your permissions after
installation is complete.
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<span class="release-info">Release 2.1, documentation updated on September 28, 2013.</span>
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