ssh annoyance -- strict mode and known_hosts cleanup

Often when using DNS names behind dynamic IP addresses the IP address might change. But the default for ssh is to ensure that the IP address still matches -- well, kinda annoying but "proper".

You can clean a host using ssh-keygen as below:

ssh-keygen -f "/home/cicorias/.ssh/known_hosts" -R "scicoriahdicluster-ssh.azurehdinsight.net"

Windows or PowerShell -

ssh-keygen -f "/Users/cicor/.ssh/known_hosts" -R "scicoriahdicluster-ssh.azurehdinsight.net"  

Or, just use the ssh -o flag:

ssh -o StrictHostKeyChecking=no user@myhostname.com