SSH is a secure network connection used to access your computer from another computer. SSH is enabled by default on Linux, but you can disable it if you want to keep your computer secure. To disable SSH on Linux, open a terminal and type the following command:
ssh -Dno-root-login
This will disable SSH for the current session.
It’s much better to have a separate account that you regularly use and simply sudo to root when necessary. Before we begin, you should make sure that you have a regular user account and that you can su or sudo to root from it.
To fix this problem, we’ll need to edit the sshd_config file, which is the main configuration file for the sshd service. The location will sometimes be different, but it’s usually in /etc/ssh/. Open the file up while logged on as root.
Find this section in the file, containing the line with “PermitRootLogin” in it.
Make the line look like this to disable logging in through ssh as root.
Now you’ll need to restart the sshd service:
Now nobody can brute force your root login, at least.
