Manual Reference Pages - GROUP (5)
- format of the group permissions file
file is the local source of group information.
It can be used in conjunction with the Hesiod domain
group, and the NIS maps group.byname and group.bygid,
as controlled by
consists of newline separated
records, one per group, containing four colon
These fields are as follows:
Name of the group.
The groups decimal ID.
Lines whose first non-whitespace character is a pound-sign (#)
are comments, and are ignored.
Blank lines that consist
only of spaces, tabs or newlines are also ignored.
field is the group name used for granting file access to users
who are members of the group.
field is the number associated with the group name.
They should both be unique across the system (and often
across a group of systems) since they control file access.
is an optional
This field is rarely used
and an asterisk is normally placed in it rather than leaving it blank.
field contains the names of users granted the privileges of
The member names are separated by commas without spaces or newlines.
A user is automatically in a group if that group was specified
entry and does not need to be added to that group in the
command does not change the
command should be used instead.
There are various limitations which are explained in
the function where they occur; see section
In older implementations,
a group cannot have more than 200 members.
The maximum line length of
is 1024 characters.
Longer lines will be skipped.
This limitation disappeared in
.Fx 3.0 .
Older binaries that are statically linked, depend on old
shared libraries, or
binaries in compatibility mode
may still have this limit.
file format appeared in
AT&T v6 .
Support for comments first appeared in
.Fx 3.0 .
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