The default group file contains the following system groups that support some system-wide task, such as printing, network administration, or electronic mail. Many of these groups having corresponding entries in the passwd file.
root::0: other::1:root bin::2:root,daemon sys::3:root,bin,adm adm::4:root,daemon uucp::5:root mail::6:root tty::7:root,adm lp::8:root,adm nuucp::9:root staff::10: daemon::12:root sysadmin::14: smmsp::25: gdm::50: webservd::80: postgres::90: unknown::96: nobody::60001: noaccess::60002: nogroup::65534: |
Group Name |
Group ID |
Description |
---|---|---|
root |
0 |
Superuser group |
other |
1 |
Optional group |
bin |
2 |
Administrative group associated with running system binaries |
sys |
3 |
Administrative group associated with system logging or temporary directories |
adm |
4 |
Administrative group associated with system logging |
uucp |
5 |
Group associated with uucp functions |
|
6 |
Electronic mail group |
tty |
7 |
Group associated with tty devices |
lp |
8 |
Line printer group |
nuucp |
9 |
Group associated with uucp functions |
staff |
10 |
General administrative group. |
daemon |
12 |
Group associated with routine system tasks |
sysadmin |
14 |
Administrative group associated with legacy Admintool and Solstice AdminSuite tools |
smmsp |
25 |
Daemon for Sendmail message submission program |
gdm |
50 |
Group reserved for the GNOME Display Manager daemon |
webservd |
80 |
Group reserved for WebServer access |
postgres |
90 |
Group reserved for PostgresSQL access |
unknown |
96 |
Group reserved for unmappable remote groups in NFSv4 ACLs |
nobody |
60001 |
Group assigned for anonymous NFS access |
noaccess |
60002 |
Group assigned to a user or a process that needs access to a system through some application but without actually logging in |
nogroup |
65534 |
Group assigned to a user who is not a member of a known group |