unrecognised command Usage: <command> <args> commands: cache_check cache_dump cache_metadata_size cache_repair cache_restore cache_writeback era_check era_dump era_invalidate era_repair era_restore thin_check thin_delta thin_dump thin_ls thin_metadata_pack thin_metadata_size thin_metadata_unpack thin_migrate thin_repair thin_restore thin_rmap thin_shrink thin_trim