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This attempts to load a Perl Module (-M flag) and use version 9999, since no module has a version this high, Perl exits either a) telling you the version of the module installed or b) tells you it can't find the module.
There are 7 alternatives - vote for the best!
Shows the path if the module is installed or exit quietly (to simply avoid the 'No documentation found' msg).
Will check if the given module is installed in the @INC. It will print the path and return 0 if found, or 1 otherwise.
Based on script from SharpyWarpy in http://www.linuxquestions.org/questions/linux-general-1/how-to-list-all-installed-perl-modules-216603/
This version uses a bash function and does not print the path to the module.
If you can do better, submit your command here.
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