You've just SSH'd into a node. Verify the hostname to confirm you're on the right machine.

Confirm which user account you're logged in as.

Check how long this node has been running since its last reboot.

Find out which directory you're currently in.

List what files and directories exist in the current directory.

Display the full kernel and system information for this node.

Read the hostname configuration file directly from the filesystem.

Show a detailed file listing including hidden files and permissions.