Ignore Host-ID
(2014-06-26)
Problem
I want to ignore the host-ID on connection for ssh. Yes, I know it is a dumb idea.
Solution
Inline, ignore this time only:
ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no user@system
Permanent ignore examples, in ~/.ssh/config:
Host 192.168.1.*
StrictHostKeyChecking no
UserKnownHostsFile=/dev/null
Host *
StrictHostKeyChecking no
UserKnownHostsFile=/dev/null
(Source)