The command-line shell of UNIX—and its AIX and Linux variants—is a powerful productivity instrument that has been developed, improved, and perfected for over 40 years. As many administrators know, shell scripting is a useful feature of AIX/UNIX/Linux, but you might not realize that shell scripting can be used for more than just creating shell script files. In fact, you can type complex shell scripts right into the terminal without ever creating an actual shell script file. This ...

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