GROUP(5)
NAME
group − group file
DESCRIPTION
Group contains for each group the following information:
group name
numerical group ID
a comma separated list of all users allowed in the group
This is an ASCII file. The fields are separated by colons; each group is separated from the next by a newline. If the password field is null, no password is demanded.
This file resides in directory /etc, and normally has general read permission.
FILES
/etc/group