How to restrict direct root user password login on Linux ?
In this post, we will see how to restrict direct root login via password, and only allow login via keys.
To achieve this, we need to change below setting in sshd_config file.
$ cat /etc/ssh/sshd_config | grep -i permitroot #PermitRootLogin yes PermitRootLogin prohibit-password
Here we have changed the permitrootlogin option from yes to “prohibit-password”.
After this, it will prohibit password login, and only login via keys is permitted.