Regenerating open ssh host keys for ubuntu/debian
Often after you clone a linux VM with open ssh server installed - the ssh keys generated at the time open ssh server was installed are copied over and you might have problems sshing to that machine.
To regenerate the host keys -
# rm /etc/ssh/ssh_host_* # dpkg-reconfigure openssh-server Creating SSH2 RSA key; this may take some time ... Creating SSH2 DSA key; this may take some time ...
That is it.
