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"date math" Help and Information

How many Friday the 13ths are there in a given year?

I'm studying Unix, and i need help writing a script. The script requires that it outputs the number of months and years from January 2007 to December 2017 inclusive that have a Friday the thirteenth....

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How can I time portions of a Linux shell script?

Just picked up your book Wicked Cool Shell Scripts and already have one quick question: While working on the startup scripts, I would like to place log timers at certain portions of scripts. Is it possible to log point A at he beginning of a section, do the processing, log point B at the end of the section and then log B minus A so I know exactly how long a section took to process?...

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"date math" Help and Information

How many Friday the 13ths are there in a given year?

How can I time portions of a Linux shell script?

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