Sed
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Some cool sed tips from https://github.com/stephenturner/oneliners
#Number each line in file.txt: sed = file.txt | sed 'N;s/\n/ /' #Trim leading and trailing whitespace in file.txt: sed 's/^[ \t]*//; s/[ \t]*$//' file.txt #Delete blank lines in file.txt: sed '/^$/d' file.txt