Section: Linux Programmer's Manual (5)
The /etc/group file is a text file that defines the groups on the system. There is one entry per line, with the following format:
The fields are as follows:
- the name of the group.:
- the (encrypted) group password. If this field is empty, no password is needed.:
- the numeric group ID.:
- a list of the usernames that are members of this group, separated by commas.:
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