9.2.3 Purposes of standard groups
A few interesting groups:
root group is the default wheel group for
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
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
For a complete list, see the "FAQ" section in the
Manual, which can also be found as the
package in Woody. Also the new
base-passwd (>3.4.6) contains
an authoritative list: