Open

Syntax: open <object|direction>
Syntax: close <object|direction>
Syntax: lock <object|direction>
Syntax: unlock <object|direction>
Syntax: pick <object|direction>

OPEN and CLOSE open and close an object or a door.

LOCK and UNLOCK lock and unlock a closed object or door. You must have
the requisite key to LOCK or UNLOCK.

PICK can open a lock without having the key. In order to PICK successfully,
you must practice the appropriate skill.

Also see BASH for warriors.