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Quick reference for Unix/Linux workstations

On this page:

Getting help

If you have a problem with your machine:
  • Check the on-line SCS Facilities documentation at http://www.cs.cmu.edu/~help.
  • Send mail to help@cs.cmu.edu.
  • If it needs immediate attention, call the SCS Help Desk at x8-4231; M-F, 9-5. The call will forward to SCS Operations during non-business hours.

Logging in

To log in to a Facilitized SCS Unix/Linux host, enter your SCS user ID and your SCS Kerberos password. You will need an account on the machine to log in. If you are using a local password (rather than your SCS Kerberos password) you must run kinit after logging in in order to get tickets for authenticating to AFS and other services.

Backups

Facilitized Unix/Linux hosts can receive nightly backups. Hosts must be left running, on the network, and booted into Unix/Linux for backups to occur. Most hosts are only put into the backup system if specifically requested. You can run
   /usr/local/bin/bustatus
to check if your host is being backed up. See our Unix/Linux backup documentation for details about our backup system and how to request backups and restores.

Reboots & shutdowns

You can damage your machine and/or lose data if you reboot it without first shutting it down properly (e.g. don't just powercycle it). On Linux hosts, you can logout and then hit ctl-alt-delete to safely reboot your machine. For other OS's, if you do not have root, please contact us so that we can safely reboot it. If you do have root, use the vendor-supplied shutdown program to reboot or halt your machine.

Root & local administration

If you are not experienced and comfortable doing Unix/Linux system administration, please contact us if you need something done on your machine that requires root privileges. It is very easy to inadvertently make a host unusable or destroy data if you are root. If you do need root privileges on your machine, contact us. Facilitized hosts are different in many ways from stock vendor distributions. Please read the local Unix/Linux administration guide before making changes to your machine. The local depot administration guide has information on how to manage software in /usr/local. Any network-aware software that you install must be kept up-to-date wrt security patches, and follow our network use policies.