You can use diff -i or –ignore-case options to ignore ‘case’ differences ‘in’ file contents.
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## ignore case differences in file contents echo -e "one\nTWO\nthree" > myfile1 ## create some files echo -e "one\ntwo\nthree" > myfile2 diff myfile1 myfile2 ## normal comparision ## returns ## 2c2 ## < TWO ## --- ## > two diff -i myfile1 myfile2 ## ignore case in file contents ## returns nothing as ignore case flag is on rm -r my* |