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#!/bin/bash # check if an input filename was passed as a command # line argument: if [ ! $# == 1 ]; then echo "Please specify the name of a file to split!" exit fi # create a directory to store the output: mkdir output # create a temporary file containing the header without # the content: head -n 1 $1 > header.csv # create a temporary file containing the content without # the header: tail +2 $1 > content.csv # split the content file into multiple files of 5 lines each: split -l 1 content.csv output/data_ # loop through the new split files, adding the header # and a '.csv' extension: for f in output/*; do cat header.csv $f > $f.csv; rm $f; done; # remove the temporary files: rm header.csv rm content.csv