The perpetrator also had copies of the /etc/shadow files, which overall contained 551 unique username and hashed password pairs. The cleartext passwords for 275 of those users (50%) are in ...

Instead of editing files, you run commands that modify the files making the needed changes for you. Let’s look at the long list of the options available with the usermod command and what they do.

On most Linux systems, the first user account will have the value 1000, and each additional user will be one higher than the previous one. UIDs with smaller values are system accounts.