No mount_root when in failsafe?

I'm booted up into failsafe mode to roll back a change I made in LUCI, which locked me out of the router. I'm trying to get to the network config files, but when I try and run mount_root, the command is not found. I'm looking at the wiki, but I don't get why this isn't working?

NEVERMIND.... I'm just dumb. I wasn't actually logged in, I was looking at my PC's Linux directories. DOH!