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51 lines
2.3 KiB
HTML
51 lines
2.3 KiB
HTML
<header>Users and Groups</header>
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<h3>Introduction to Users</h3>
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A Unix user is typically someone who can login to the system, either
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remotely via telnet or at the console. Every file is owned by some user,
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and every process runs with the rights of some user. Access to files and
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processes is determined by the user you are logged in as. <p>
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There are really three types of users on a typical Unix system :
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<ul>
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<li><b>Administrative Users</b><br>
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Accounts like <tt>bin</tt>, <tt>lp</tt> and <tt>uccp</tt> own files
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such as the standard commands in <tt>/bin</tt>, print spool files and
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UUCP data. Actually logging in with one of these accounts is not
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normally allowed - they are used only by various system processes.
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These users will be created when the operating system is first installed.<p>
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<li><b>Real People</b><br>
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These are accounts owned by real users, created by the system
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administrator. You may allow these users to login remotely, or maybe
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let them only to send and receive mail via SMTP and IMAP. <p>
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<li><b>The <tt>root</tt> User</b><br>
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The <tt>root</tt> user has the power to read and write any file
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or directory and control any process. This account is typically used
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for system administration purposes, and is the account under which
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Webmin runs. <p>
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</ul>
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At the top of the main page of this module is a table of existing users
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on your system. You may click on a user to edit it, or click on the link
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below the table to create a new user. Users whose login names are shown in
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italics are those whose passwords are temporarily disabled. <p>
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<h3>Introduction to Groups</h3>
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A group is simply a list of Unix users. Every user has belongs to at least
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one group (their primary group), and optionally several others. All files
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are owned by some group, and every process runs with the permissions of
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a group. <p>
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Below the list of users is a table of existing groups. You may click on
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a group name to edit it, or click on the link below the table to create
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a new group. <p>
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<h3>Recorded Logins</h3>
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Every time a user logs in by SSH, FTP or at the console the system records
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that login and the subsequent logout. At the bottom of the main page is
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a small form that allows you to display logins either by everyone, or by
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a selected user. <p>
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<hr>
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