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May I ask what read -a do and F means too?

Also I why did you use printf instead of echo now? I don't know much about printf may I ask if its like grep or awk?

Then, what does %s mean I know \n...

hi I made this simple script to extract data and pretty much is a list and would like to extract data of two words separated by commas and I would like to make a new text file that would list these...