search for: metaflac_shorthand_add_replay_gain

have linux install on my laptop, and decide to clean up my music collection, found allot of my music that has replaygain tags, and allot don't. How would I fix the ones that don't have any replaygain tags, ? have flac and flac123 ogg ogg123 vorbistools and vorbisgain..etc, all installed, can play music fine, but when I hit a song, that doesn't have replaygain tags, need to turn down

Have about 200 flac files, that DON'T have replay-gain tags.. I would just like to ? re-encode them with replay-gain tags? if possible if possible what command line string would work? Thanks in Advance Richard