Logging in as the root user should never be done on Linux. Using the root account could lead to disaster. Sudo is the preferred method of gaining elevated privileges. When I first started using Linux ...
Of all the Linux commands, rm is notorious. It's easy to completely wipe out your system with one mislaid rm command as root. I knew not to, but I ran that command on purpose anyway. Here's why.
As Terry Lambert, the developer behind Linux ancestor Unix, once said, "It is not Unix's job to stop you from shooting your foot. If you so choose to do so, then it is Unix's job to deliver Mr. Bullet ...