How Do I ... Reset a screen

Hung screens should not happen frequently at all, if they do the chances are someone is doing something 'weird'. Make sure you make a note in your computer log so you can determine any trends.

One of the common causes is someone going into an option they don't understand, switching the screen off/on making it impossible to see what was there and if there ware any options.

There are a few steps you can take:

On the 'hung' screen - are there any options to Exit or Quit?
If the screen is blank try pressing <ctrl> L as this is used in a few programs to 're-draw' the screen.
If you have a $/# prompt but can't type anything try
<ctrl> J stty sane <crtl> J
If you are unable to get the screen back to a known state you will need to 'kill' it.
If you know the 'tty' number then jump to the next step.
Go to any working premvet screen, press F11 can you see the user listed - if so look at the 1st column and make a note of the 'tty' number.
If they are not listed here then, unless you login to Unix with your own names then the only option is to do a controlled shutdown or contact support. If you do login as individual users then in the step below use ps -u user-name.
Login as root (or as the same user who has locked the screen) and at the O.S. prompt (#, $, Vet>) type:
ps -t tty-number e.g. ps -t tty01
The screen will show something similar to:
```
      PID     TTY        TIME CMD
    11242   tty01    00:00:00 login
    11245   tty01    00:00:00 sh
    11276   tty01    00:00:00 run14
```
Look for the line ending in run14 you will need the number in the PID column for this line.
Type:
kill pid-number
The screen, if locked in Premvet, has been reset.
It didn't work !!
If it didn't work then:
- Check you have the correct 'tty number'.
- If you are not logged in as root, login as root and re-try.
- If the ps command did not list run14 then repeat step (e) but look for the line(s) ending in 'sh' or 'ksh' and kill them
  e.g. kill 11245
- If this has still not reset it, repeat the above line but add in the 'sure fire' option "-9"
  e.g. kill -9 11245
- Contact support or do a controlled shutdown

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How Do I ... Reset a screen