chown - change owner
chown [-R] owner[:group] file ...
Change directory hierarchies
chown ast file1 file2
# Make ast the owner of the files
chown -R ast:other dir
# Change the owner and group of all files in dir
The owner field (and optionally group field) of the named files is changed
(i.e., login name specified) and
Alternatively, a decimal uid(gid) may be specified instead of a user name.
Only the superuser may execute this command.