When you start your Linux administration duties, you will be given a handful of Linux servers to maintain. Let’s suppose you are being given two or three servers at the beginning of your Linux career. That is manageable, and you’d only need to keep up with a few configuration files such as passwords and groups. In addition to those configuration files, you will also to keep track of which users are assigned to each server that will hold their individual data. Later, additional servers will be given to you as you gain experience with Linux administration. Most of the time, the new servers you will handle will contain a different set of system users. You will have to be twice as careful not to confuse which account belongs to what host and vice versa. As a result, the more Linux servers you are going to maintain, the more diverse and/or complex your administration of them will be.
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