Home

RU Big Data Wiki

Feel free to help create a useful resource for this and future cohorts of students!

Frequently Asked Questions

• UNIX
  1. Do you know of good resources to improve my UNIX skills?
• Huygens PCs
  1. How can I run docker containers using podman on the PCs in the Huygens terminal rooms?
• Docker
  1. Starting docker in WSL2 gives an error message
  2. How do I put myself in the docker group (and why should I?)
  3. I receive the error message connect to host 434c982d9cb4 port 22: Connection refused, what should I do?
  4. How do I put/get files from/to the docker container? 4.5. I'm using WSL2 and can't find my files in Linux!
  5. Can I use podman instead of docker?
• VPN
  1. How to setup Science VPN
• Hadoop
  1. Map Reduce job submitted with yarn starts, but then stalls at XX% and continuously retries to connect
  2. After map reduce job fails, cannot connect to history server
  3. Name node is in safe mode
  4. I receive the error message connect to host 434c982d9cb4 port 22: Connection refused, what should I do?
  5. Troubleshooting assistance
• Spark
  1. Zeppelin terminal on http://localhost:9001/ is not loading

Feel free to add topics to the list and start a new FAQ.

More FAQ info, related to topics from previous years of the course, is available in the old FAQ page.