Purdue University

Frequently Asked Questions

Some common questions, errors, and problems are categorized below. Click the Expand Topics link in the upper right to see all entries at once. You can also use the search box above to search the user guide for any issues you are seeing.

• About Hammer
  • Can you remove me from the Hammer mailing list?
  • How is Hammer different than other Community Clusters?
  • Do I need to do anything to my firewall to access Hammer?
• Logging In & Accounts
  • Errors
    • /usr/bin/xauth: error in locking authority file
    • My SSH connection hangs
  • Questions
    • I worked on Hammer after I graduated/left Purdue, but can not access it anymore
• Jobs
  • Errors
    • cannot connect to X server / cannot open display
    • bash: command not found
    • qdel: Server could not connect to MOM 12345.hammer-adm.rcac.purdue.edu
    • bash: module command not found
    • 1234.hammer-adm.rcac.purdue.edu.SC: line 12: 12345 Killed
    • close Firefox / Firefox is already running but not responding
  • Questions
    • How do I check my job output while it is running?
    • What is the "debug" queue?
    • How can I get email alerts about my PBS job status?
    • Can I extend the walltime on a job?
    • How do I know Non-uniform Memory Access (NUMA) layout on Hammer?
• Data
  • My scratch files were purged. Can I retrieve them?
  • How is my Data Secured on Hammer?
  • Can I share data with outside collaborators?
  • Can I access Fortress from Hammer?
• Software
  • Cannot use pip after loading ml-toolkit modules
  • How can I get access to Sentaurus software?
• About Research Computing
  • Can I get a private server from RCAC?