Say you’re working at a log search company and you need to quickly generate some SSH Invalid User errors for searching or alerting within your product.
while true; do ssh -o PreferredAuthentications=publickey bob$RANDOM@localhost; sleep 240; done
This should generate some messages in your logs (/var/log/secure.log under MacOS) like:
Aug 10 10:06:03 jupiter sshd[73325]: Invalid user bob30582 from ::1
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