1) Start typing a command `ssh`
2) Use `up` arrow to go backward in your history
2) Use `down` arrow to go forward in your history
1) Replace CapsLock with Ctrl
2) Use Ctrl-P, Ctrl-N to navigate the commands
It's the weaker little brother to ctrl-r, only useful for commands ran 1,2 invokes ago.
ctrl-r is more functional I'd say