+'o' - Will shut your system off (if configured and supported).
+
+'p' - Will dump the current registers and flags to your console.
+
+'q' - Will dump a list of all running timers.
+
+'r' - Turns off keyboard raw mode and sets it to XLATE.
+
+'s' - Will attempt to sync all mounted filesystems.
+
+'t' - Will dump a list of current tasks and their information to your
+ console.
+
+'u' - Will attempt to remount all mounted filesystems read-only.
+