GROUP(5) File Formats Manual GROUP(5)
group - group file
Group contains for each group the following information:
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 new-line. If the password field is
null, no password is demanded.
This file resides in directory /etc. Because of the encrypted pass-
words, it can and does have general read permission and can be used,
for example, to map numerical group ID's to names.
setgroups(2), initgroups(3X), crypt(3), passwd(1), passwd(5)
The passwd(1) command won't change the passwords.
15 January 1983 GROUP(5)