Group (database)
From Wikipedia, the free encyclopedia
Group is a name service database used to store group information on Unix-like operating systems. The sources for the group database (and hence the sources for groups on a system) are configured, like other name service databases, in nsswitch.conf.[citation needed] The database file is located at /etc/group
. It contains fields representing the group name, group id, encrypted password, and users belonging to the group. These fields are stored in a structure defined in the header file <grp.h>
.[1]
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Seeing available groups on a Unix system
The contents of the group database (and available groups) can be seen with a variety of tools:
C
The <grp.h>
header file contains the functions getgrgid
and getgrname
to look up a group by its ID or Name, as well as the functions setgrent
, getgrent
, and endgrent
to iterate through all groups.[1]
Command line
The getent command can be used to fetch group information.[citation needed]
Fetching a list of all available groups
getent group
Fetching a specific group
For a specific group called 'users':
getent group users
Python
- grp - The Group Database — a Python module
References
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