Chapter 19Writing Scripts

While you can enter individual shell commands at the command line, there are times when doing so is not efficient. For example, if you need to enter the same 15 commands to accomplish a certain task, a single shell script can handle the job faster than you can type in those commands. However, shell scripts go beyond just repeating commands. They allow you to modify their behavior through the use of variables and change the course of their actions based on results of conducted tests.

In addition, you can configure shell scripts to run at night unattended, while you're asleep. Even better is that you can write a single set of shell scripts and then deploy them to all the various servers you administer. If written well, ...

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