Cha Gascon Inexplicable Software Angst

How to Disable known_hosts in ssh

I've been working on building custom live linux systems for a while now. The problem is, everytime I reboot the live linux machine and I ssh/scp to it, I get this message:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
64:af:03:87:17:e4:23:51:a5:1c:12:e4:47:90:70:b0.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending key in /root/.ssh/known_hosts:1
RSA host key for 192.168.1.179 has changed and you have requested strict checking.
Host key verification failed.

Normally, I'll just remove the offending line from the know_hosts file and get ony with my life, but after repetitive rebooting and repetitive RSA host warnings, it's starting to annoy me.

To disable rsa host checking, add a config file to your local .ssh folder,

vim ~/.ssh/config

and add the following options:

# automatically adds rsa host key to list of known hosts
StrictHostKeyChecking no
# sets know_hosts file to the data sink so it will never be written
UserKnownHostsFile /dev/null