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/etc/groupfile is world-readable and contains a list of groups, each on a separate line. Each line is a four field, colon delimited list including the following information:
- Group name — The name of the group. Used by various utility programs as a human-readable identifier for the group.
- Group password — If set, this allows users that are not part of the group to join the group by using the
newgrpcommand and typing the password stored here. If a lower case
xis in this field, then shadow group passwords are being used.
- Group ID (GID) — The numerical equivalent of the group name. It is used by the operating system and applications when determining access privileges.
- Member list — A comma delimited list of the users belonging to the group.
Here is an example line from
This line shows that the
generalgroup is using shadow passwords, has a GID of 502, and that
For more information on
/etc/group, see the