CHGRP(1)CHGRP(1)NAMEchgrp - change file group
SYNOPSISchgrp [ -ou ] group file ...
The group of each named file is changed to group, which should be a
name known to the server holding the file.
A file's group can be changed by the file's owner, if the owner is a
member of the new group, or by the leader of both the file's current
group and the new group.
The -o and -u option are synonyms; they specify that the owner is to be
set, rather than the group. They are ineffectual unless the file
server is in the bootstrap state that permits changing file ownership.
SEE ALSOls(1), chmod(1), stat(2)CHGRP(1)