CS Phd Linux Network
Troubleshooting

If your PC is not working properly, there are a number of things you can do to diagnose or sometimes fix the problem yourself. Remember the two things you can do as a first and last measure: warm (soft) boot and cold (hard) boot. The first is a software reset (e.g. Ctrl+Alt+Del), the second is a hardware reboot. You can also try power-cycling or just leaving your computer off and letting it cool off.

Here are some common problems along with suggested solutions.


Why isn't my mouse/keyboard/speakers working?

Check for loose wires. Unplug and reconnect the device.

If the monitor was poorly connected to the PC, turn it off and on.

In GNOME, look under Program -> Settings, find your device and see if it's activated.

Try rebooting the machine by either selecting Reboot from the Log Out menu or using the command reboot.


Why does my PC seem "laggy"? (i.e. the mouse skips when you drag it across the screen, keystroke appear on the screen with a slight delay, etc)

Use the utility top to check if your PC is thrashing or if a process is hogging all the memory. If you see a problematic process, try: kill -HUP pid or, as an extreme measure, kill -KILL pid

Often a CD utility may lag the computer. See if there's a CD-player running and try turning it off.


Why is the network slow?

Try pinging your gateway. If you're in Warren Weaver that's 128.122.20.1, if you're in 415/419 Broadway that's 128.122.140.1. If the gateway is slow to respond, the problem may be with the network and not with your computer.

Are you running something that's heavy on the bandwidth? Your mailer may be uploading or downloading email in the background. Streaming audio/video may lag your computer.


I'm no longer able to print documents. What's going ?

You may be spooling to the incorrect server for the printer you're trying to use. For example, you should not be spooling to tango.

Under Red Hat 8.0, to see which printers your system is configured to use, start up the Red Hat Printer Configuration application( located under System -> Settings in your GNOME menu). If you're not logged on as root, you'll be asked to enter the root password.

This application will list the printers that your system is configured to print to along with the servers that they interface with (listed under Details). To make sure that you have the correct server listed for each printer, first log onto access.cims.nyu.edu and type in the following command: lpstat -v

You should now be presented with a list of all the printers connected to the CIMS network along with their proper spool servers. Check to make sure that for each printer listed by the Printer Config application, the spool server listed is the same as that listed by the lpstat command. If they are different, you must enter the correct one by doing the following:

  1. In the Printer Config application, highlight the printer whose server you wish to change and click on the Edit icon.
  2. A new Edit Queue window should appear. Select the tab marked Queue Type
  3. Under the field marked Server, change the following:
    <server listed by the lpstat command for the selected printer>.cims.nyu.edu
  4. Click on Ok

Save your changes and restart lpd (by selecting File->Restart lpd) and you're done.