Limiting login attempts is a security measure that prevents brute force attacks, which try to guess your password by trying different combinations. If someone tries to log in as root or another ...

Also: The best Linux distros for beginners With sudo in place, users no longer had to change to the root user or log in to that account to run administrative commands, such as installing software.

The root access in Ubuntu gives you full access to edit configuration files and other administrative tasks. Here's how to log in as root.

Of course, this is a bit risky, especially if you don't log straight out after doing what you need. It also means that you have to give the root password, and therefore full access, to any user ...