finding disk space usage

How would I go about finding the about of disk space occupied by a certain directory?

For example, /u1/cvera => 530 MB

Thanks =)

du -h /some/dir | tail -1

or if that doesn't work

du -k /some/dir | tail -1

du -sk /some/dir

both command options [du -k] AND [du -sk] worked great. The [du -h] option was an unrecognized commandline option. Thanks very much. :slight_smile: