Root login is perhaps one of the very few vulnerabilities that Linux operating system faces. A person can hack into your system as a root user easily and can play with security settings. This guide will show you how to disable it so you can still login as root but just not directly, reducing the security issue.

This will force a hacker to have to go through a double security checks where he will have to give 2 separate passwords to gain root access. What happens is you'll first need to login as your admin user in SSH, then switch to the super user with the su command to get root. It also forces the use of SSH protocol 2, which is a newer and more secure SSH protocol. This almost nullifies any chance of unauthorized access to your root account.

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