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<h3 class="section">29.13 User Database</h3>

<p><a name="index-user-database-3388"></a><a name="index-password-database-3389"></a><a name="index-g_t_002fetc_002fpasswd-3390"></a>
This section describes how to search and scan the database of registered
users.  The database itself is kept in the file <samp><span class="file">/etc/passwd</span></samp> on
most systems, but on some systems a special network server gives access
to it.

<ul class="menu">
<li><a accesskey="1" href="User-Data-Structure.html#User-Data-Structure">User Data Structure</a>:          What each user record contains. 
<li><a accesskey="2" href="Lookup-User.html#Lookup-User">Lookup User</a>:                  How to look for a particular user. 
<li><a accesskey="3" href="Scanning-All-Users.html#Scanning-All-Users">Scanning All Users</a>:           Scanning the list of all users, one by one. 
<li><a accesskey="4" href="Writing-a-User-Entry.html#Writing-a-User-Entry">Writing a User Entry</a>:         How a program can rewrite a user's record. 
</ul>

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