Openssh howto how to#

Change its permission so that it is read only. Host *Īdd the following line to disable checks to specific host 123.45.67.89 Host 123.45.67.89 $ sudo vi ~/.ssh/configĪdd the following line to disable checks for all hosts. In this case, once you disable the strict host key checking, your SSH client will never check it. If you want to disable it every time the connection is made, then you need to update the SSH config file. Basically, you need to include StrictHostKe圜hecking=no option $ ssh -o StrictHostKe圜hecking=no approach is useful if you want to disable the check once in a while, or if you want to disable checks for specific host, but not all hosts.

You can disable strict host checking with the following command. There are two ways to disable strict host key checking – via command line, and via config file. $ ssh authenticity of host 'remote-host (123.45.67.89)' can't be established.

Here is an example of warning message you see when you try to connect to an SSH host the first time.

Openssh howto how to#

How to Disable Strict Host Key Checking in SSH In this article, we will learn how to disable host key checking in SSH. But sometimes you may need to disable strict host key checking in SSH, especially if you are programmatically making SSH connections. If you accept it by entering yes, then SSH client will connect to SSH server. It will prompt you to accept or reject the host. Else, it will display a warning saying it is an unknown host. If the key of SSH server is found in known_hosts file, then SSH client will connect to it. In this case, the SSH client will check the host of SSH server to see if it is present in the SSH client’s known host file at ~/.ssh/known_hosts. By default, SSH server performs strict host checking when you make a connection to it.