super(inc) - phpMan
btrfs-select-super (8) - overwrite primary superblock with a backup copy btrfs-show-super (8) - query various internal information postsuper (1) - Postfix superintendent
btrfs-select-super (8) - overwrite primary superblock with a backup copy btrfs-show-super (8) - query various internal information postsuper (1) - Postfix superintendent