After some updates, our Ubuntu 14 MATE desktop doesn't have a panel, nor does it load a terminal.  After pressing ctrl+alt+f1, and logging into our account, I tried the command:mate-panel --resetBut it says command not found.  We think this will fix our problem as described here:http://forums.linuxmint.com/viewtopic.php?f=206&t=124839But why it is saying mate-panel command not found?
mate-panel --reset command not found
ubuntu;mate