REMOTE SENSING / GIS TEACHING LAB(BNR 208)

Department of Geography and Earth Resources
College of Natural Resources
USU
IF YOUR MACHINE `FREEZES'...

1) Login on another machine using the same login and password

2) At the Unix prompt, type in ssh <name_of_frozen_machine> The names are on the machines and also at the prompt.  You will get the familiar login screen after which a Unix prompt will appear.

3) At the new Unix prompt, type in psg  arc if you were running an arc program at the time the machine froze (you can also type psg imagine, psg netscape, etc.) You should get a list of all arc,
imagine, netscape, or etc. processes that are currently running and their PID #s.
    major{rsclass}12: psg imagine
            UID    PID    PPID    C    STIME    TTY        TIME    COMD
    bbanner      8122    8121      1  12:17:08  ?           0:00
    /auto/imagine/830/bin/sun4sol/viewer create at 0 130 size 512 512
      bbanner    8121        1       8 12:17:02  ?            0:02 /auto/imagine/830/bin/sun4sol/eml
    /auto/imagine/830/scripts/imagine.eml

4) Type zap and the correct PID number Note: don't type PID, type the number shown under PID!
You will get a message that says `PID killed with SIGTERM' after which the machine should free up!

5) If the machine is still frozen, try zapping another process.  If the machine is still frozen, try the psg command with another program.  If you tried psg arc, for example, try psg netscape.  If you still can't get it, tell Bonnie,  or your instructor.
                     e-mail bbanner@nr.usu.edu

           PLEASE DON'T JUST WALK AWAY FROM A LOCKED MACHINE!!
6) After freeing your machine, make sure to type in exit in order to break the rlogin connection, and then log out.

7) If  your machine is not frozen, but the program you are using is, just get another UNIX window and type psg imagine, psg arc, etc. at the UNIX prompt.  Then just type zap PID# as stated in the steps
above.


RS/GIS TL/ Utilizing the Lab Introduction
Home

Author:Bonnie B. Banner  _   RS/GIS Teaching Lab Manager,  Department of Geography and Earth Resources
College of Natural Resources, Utah State University, Logan, Utah 84322-5240,  _  Lab Phone (435)797-1264, fax (435)797-4048
For Scheduling Information  _  bbanner@nr.usu.edu, voice (435)797-7117