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 Brown
  • Can you remove me from the Brown mailing list?
  • How is Brown different than other Community Clusters?
  • Do I need to do anything to my firewall to access Brown?
• Logging In & Accounts
  • Errors
    • /usr/bin/xauth: error in locking authority file
    • My SSH connection hangs
    • Thinlinc session frozen
  • Questions
    • I worked on Brown 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
    • bash: module command not found
    • Close Firefox / Firefox is already running but not responding
    • Jupyter: database is locked / can not load notebook format
  • Questions
    • How do I know Non-uniform Memory Access (NUMA) layout on Brown?
    • Why cannot I use --mem=0 when submitting jobs?
• Data
  • How is my Data Secured on Brown?
  • Can I share data with outside collaborators?
  • Can I access Fortress from Brown?
• 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?