The Ghost in the Shell series were about efficient working in the shell environment but one of the feats of any sysadmin profession is the shell scripting. It is often needed to ‘glue’ various solutions and technologies to work as ‘Business’ requires or to fill the gap where any solution is not available – or at least not for free. It also serves a growing role in the automation of various tasks. Today I will try to show you the basics of writing POSIX /bin/sh compatible shell scripts.
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