Linux Troubleshooting If you find that the cursor has gone away, with no indication of ever returning, try the old standby CTRL-c. This means hold down the Ctrl key and hit ?c?. This ought to kill the hung process. If this fails, try CTRL-z, where you hit ?z? instead of ?c?. This suspends, rather than kills, the hung process but still might let you recover. This is Critical: Never, ever, just turn off the machine in order to ?reboot?. Linux does not tolerate that very well, and will likely foul up the local disk. Recovery from that is a painful process. Let an instructor know if your system is frozen. Chances are very good we can fix it by logging in from a different machine. Security Note: Never, ever, use telnet or ftp to access the astronomy department computing system. Instead use ssh and scp, which are the secure, encrypted equivalents of these utilities.
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