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Top 5 Courses to Learn Linux Shell scripting (bash, ksh, csh)Online – Best of Lot

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A massive chunk of a developer's time is wasted in trying to repeat tasks and commands, especially when it comes to working with a bunch of UNIX or Linux machines, and a good knowledge of shell scripting can free you from such mundane task and give time to do some interesting stuff. If you don't know what shell scripting is then let me tell you is nothing but a program written using shell built-ins, and Linux commands to automate things, e.g. checking if a host is reachable or finding and deleting large files which are older than certain days or archiving them into another machine. Basically, it's a tool that allows you to automate the boring and repeating task, and that's the way programmers should work. They should not be repeating stuff; instead, they should be investing that time to create a script or program which can automate that task.

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