-o

operate interactively, sending output to FILE

-i

consider upper- and lower-case to be the same

-E

ignore changes due to tab expansion

-Z

ignore white space at line end

-b

ignore changes in the amount of white space

-W

ignore all white space

-B

ignore changes whose lines are all blank

-I

ignore changes all whose lines match RE

--strip-trailing-cr

strip trailing carriage return on input

-a

treat all files as text

-w

output at most NUM (default 130) print columns

-l

output only the left column of common lines

-s

do not output common lines

-t

expand tabs to spaces in output

--tabsize

tab stops at every NUM (default 8) print columns

-d

try hard to find a smaller set of changes

-H

assume large files, many scattered small changes

--diff-program

use PROGRAM to compare files

--help

display this help and exit

-v

output version information and exitIf a FILE is '-', read standard input. Exit status is 0 if inputs are the same, 1 if different, 2 if trouble.AUTHORWritten by Thomas Lord.REPORTING BUGSReport bugs to: bug-diffutils@gnu.orgGNU diffutils home page: <http://www.gnu.org/software/diffutils/>General help using GNU software: <http://www.gnu.org/gethelp/>COPYRIGHTCopyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later<http://gnu.org/licenses/gpl.html>.This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent per‐mitted by law.