Ssh Disable Host Key Checking

Internal

• ssh

Overview

The ssh client verifies the identity of the host it connects to, by checking its host key. If the remote host is not known to your system - meaning that its host key is not present in ~/.ssh/known_hosts, the ssh client interactively asks you to accept the host key's to be written into the file:

The authenticity of host '[192.168.1.8]:22 ([192.168.1.8]:22)' can't be established.
ECDSA key fingerprint is 83:59:aa:33:10:98:48:f9:12:96:c4:e3:c2:75:50:b6.
Are you sure you want to continue connecting (yes/no)? yes

When run interactively this is usually not a problem, but the behavior could cause problems when ssh is run from a script, so there are situations when we want to inhibit this behavior, by disabling key checking.