It's not the command I used, but I think it does the same thing btrfs balance start --full-balance /path/to/mountbtrfs balance start --full-balance /path/to/mount
i haven't confirmed if it'll work on linux, but i think i found out how to launch fortnite without anti-cheat, am currently attempting to join a game to see if it just.. works.
actually i don't even see an easy anticheat process with this one, maybe the other one is literally just the "easyanticheat" splash screen and that's it