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Debian GNU/Linux Reference Guide
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9.2.3 Purposes of standard groups

A few interesting groups:

  • root group is the default wheel group for su if pam_wheel.so is used without the group= argument.

  • adm group can read logfiles.

  • cdrom group can be used locally to give a set of users access to a CD-ROM drive.

  • floppy group can be used locally to give a set of users access to a floppy drive.

  • audio group can be used locally to give a set of users access to an audio device.

  • src group owns source code, including files in /usr/src. It can be used locally to give a user the ability to manage system source code.

  • staff membership is useful for helpdesk types or junior sysadmins, giving them the ability to do things in /usr/local and to create directories in /home.

For a complete list, see the "FAQ" section in the Securing Debian Manual, which can also be found as the harden-doc package in Woody. Also the new base-passwd (>3.4.6) contains an authoritative list: /usr/share/doc/base-passwd/users-and-groups.html.


Debian GNU/Linux Reference Guide
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