System administration can be done using either text-based utilities (such as Bash, the Bourne-again shell) or graphical tools. There are more text-based utilities than graphical tools, however, and there are cases where it is more convenient to use one or the other. There are also cases where you must rely solely on text-based solutions, such as running the rescue environment. As a system administrator, you will be using a combination of both, deciding case by case which is best to get the job done.
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