to add my little part if you want to change also the group not only the user.

chgrp works pretty much the same way as chown does, except it changes the file’s user group instead of the owner, of course.

$ chgrp usergroup somefile

After issuing this command, the file somefile will be owned by a user group usergroup. Although the file’s group has changed to usergroup, the file’s owner will still be the same.

The options of using chgrp are the same as using chown. So, for example, the -R and -v options will work with it just like they worked with chown:

$ chgrp -Rv usergroup somedir
changed group of ‘somedir/’ to usergroup
changed group of ‘somedir/boringfile’ to usergroup
changed group of ‘somedir/somefile’ to usergroup

Regards,

Eduardo

I am used this pattern, this pattern changed the group name but not change owner. I am write code here .

$fileName = $root_directory.’user_privileges/user_privileges_’.$userid.’.php’;
exec(“chown employhr $fileName”);
exec(“chgrp -R employhr $fileName”);
exec(”);

Please suggest me how I can do these fo change owner/group.

Regards
Saleem

This one did the trick for me!