zfs list -t snapshot|sed '/@/s/@.*$//'|uniq zfs list -t snapshot|sed '/@/s/@.*$//'|uniq|xargs zfs list zfs list -t snapshot|sed '/@/s/@.*$//'|uniq|xargs zfs list -t snapshot -o name,creation -s creation zfs list -t snapshot -o name,creation -s creation backup/flexible|tail -3