Search notes:

/etc/group

/etc/group stores available groups and the users that are the groups' members.

File format

Each line consists of four fields which are separated by colons:
Group name
Password In most cases not used (the value is x) and present only for historic reasons
Group ID (GID) A unique number that uniquely identifies the group
Member list The members (users) in the group, separated by commas.

See also

A user can be added to a group with usermod -aG …
The shell commands /etc/passwd and getent
/usr/share/doc/base-passwd/users-and-groups.txt.gz

Index

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