Understanding Functions in Bash
Jul 06, 2011, 02:00 (0 Talkback[s])
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Because the function is executed in the context of the
same shell, it does not create a new child process, this makes
functions faster as they access the information in RAM. This also
will save on resources as you use functions.
"Functions are a script within a script which can be defined by
the user and stored in memory, allowing you to reuse the function
repeatedly. This also provides a modular aspect that allows you to
debug one function at a time be disabling functions."