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Common Login Issues

1. "Host Key verification failed"​

When logging into the cluster using a Mac or command-line tool, you may encounter a "Host Key verification failed" error, preventing login.

This error occurs because the login address points to a load-balanced login node. Each login is randomly assigned to one of the six login nodes based on availability.

To resolve this, delete the line corresponding to the IP address in the known_hosts file (or delete the file entirely).

rm -f ~/.ssh/known_hosts

2. Account Password Update​

If needed, enter 'cepasswd' in your local personal directory to change the login password. After successful modification, use the new password to log in to the cluster again.
Password requirements: Minimum 8 characters, must include numbers, letters, and special characters (!@#$%^&*?_)

3. Check Storage Space Usage​

lfs quota -hu $USER $HOME

4. VNC Cache Cleanup​

rm -rf /tmp/.X11-unix/*
rm -rf /tmp/.X*lock