Troubleshooting
Cannot Connect via SSH
Check network connectivity:
ping server.example.edu
Verify SSH access:
ssh username@server.example.edu
Common causes:
Incorrect username.
Incorrect hostname.
Missing SSH key.
Firewall restrictions.
Permission Denied
Verify ownership:
ls -l
Check permissions:
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys
Disk Quota Exceeded
Check usage:
du -sh ~
Check quota:
quota -s
Job Stuck in Queue
Inspect queue information:
squeue -u username
Inspect job details:
scontrol show job JOB_ID
Possible causes:
Insufficient resources available.
Partition restrictions.
Time limit too large.
Memory request too large.
Jupyter Does Not Start
Verify installation:
jupyter --version
Check for occupied ports:
netstat -tulpn | grep 8888
Try another port:
jupyter lab --port=8889
Collecting Diagnostic Information
Before contacting administrators, collect:
Username.
Command executed.
Full error message.
Date and time.
Relevant log files.