One Day One GNU/Linux Command
=============================
chown -- CHange file OWNer and Group
Summary :
`chown' changes the user and/or group ownership of each given file to
the specified user and/or group.
Examples :
$ chown usr1 file1 -- Make usr1 as the owner of the file1. No
change in the group.
$ chown usr1 f1 f2 f3 -- Make usr1 as owner for f1, f2 and f3.
$ chown usr1.grp1 file1 -- Change owner as usr1 and group ad grp1 of
the file1.
$ chown usr1:grp1 file1 -- Same as above. But `:' in place of the `.'
$ chown 500:400 file1 -- Set a user, Whos user id is 500, as the owner
and a group, which id is 400, as the group.
$ chown usr1. file1 -- No group is specified after DOT. So usr1's
login group taken as group.
$ chown .grp1 file1 -- Only group will change.
$ chown -R usr1:grp1 dir1 -- Recursively change ownership of Dir and
their contents.
$ chown -c usr1 f1 f2 f3 -- Show verbose output only when a change is
made.
$ chown -v usr1 f1 f2 f3 -- Show verbose output for every file
processed.
$ chown -f usr1 f1 f2 f3 -- Force/Silent/Quiet. Do not print error
messages.
$ chown --reference=that this -- Set the 'that' file's owner and group
to 'this' file.
$ chown --from=usr1 usr2 * -- Change a file's ownership only if it's
owner is usr1
Note:
1) Separators `.' and `:' is interchangeable.
2) No embedded white space is allowed between user and group.
3) Instead of user/group name, User ID and Group ID can be used.
$ echo $UID -- Show User ID.
$ echo $GROUP -- Show Group ID.
Read : man chown
HTH :)
--
Bharathi S
