jfs_tune -VERSION (return code: 0)
jfs_tune version 1.1.15, 04-Mar-2011
jfs_tune -HELP (return code: 255)
jfs_tune: invalid option -- '-'
jfs_tune version 1.1.15, 04-Mar-2011
Usage: jfs_tune [-J options] [-l] [-L vol_label] [-U uuid] [-V] device
Emergency help:
-J options Set external journal options.
-l Display superblock
-L vol_label Set volume label.
-U uuid Set UUID.
-V Print version information only.