CHGRP(1) General Commands Manual CHGRP(1)
chgrp - change group
chgrp [-h] [-R [-H | -L | -P]] group file ...
chgrp sets the group ID of the specified files.
The options are as follows:
-H If the -R option is specified, symbolic links on the command line
are followed. Symbolic links encountered in the tree traversal
are not followed.
-h Treat symbolic links like other files: modify links instead of
following them. The -h and -R options are mutually exclusive.
-L If the -R option is specified, all symbolic links are followed.
-P If the -R option is specified, no symbolic links are followed.
-R Recurse. Where file is a directory, change the group ID of the
directory and all the files and directories in the file hierarchy
The -H, -L, and -P options are ignored unless the -R option is specified;
if none of them are given, the default is to not follow symbolic links.
In addition, these options override each other and the command's actions
are determined by the last one specified.
The group operand can be either a group name from the group database, or
a numeric group ID. If a group name is also a numeric group ID, the
operand is used as a group name.
By default, chgrp clears the set-user-ID and set-group-ID bits on the
file to prevent accidental or mischievous creation of set-user-ID and
set-group-ID programs. This behaviour can be overridden by setting the
sysctl(8) variable fs.posix.setuid to zero.
The user invoking chgrp must belong to the specified group and be the
owner of the file, or be the superuser.
/etc/group group ID file
The chgrp utility exits 0 on success, and >0 if an error occurs.
chown(2), fts(3), group(5), passwd(5), symlink(7), chown(8)
The chgrp utility is compliant with the IEEE Std 1003.1-2008
OpenBSD 5.9 December 31, 2015 OpenBSD 5.9
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