/sbin/fsck.zfs is in zfsutils-linux 0.6.5.6-0ubuntu8.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | #!/bin/sh
#
# fsck.zfs: A fsck helper to accomidate distributions that expect
# to be able to execute a fsck on all filesystem types. Currently
# this script does nothing but it could be extended to act as a
# compatibility wrapper for 'zpool scrub'.
#
exit 0
|