sdiff − side-by-side merge of file differences


sdiff [OPTION]... FILE1 FILE2


Side−by−side merge of differences between FILE1 and FILE2.

Mandatory arguments to long options are mandatory for short options too.
, −−output=FILE

operate interactively, sending output to FILE

−i, −−ignore−case

consider upper− and lower−case to be the same

−E, −−ignore−tab−expansion

ignore changes due to tab expansion

−Z, −−ignore−trailing−space

ignore white space at line end

−b, −−ignore−space−change

ignore changes in the amount of white space

−W, −−ignore−all−space

ignore all white space

−B, −−ignore−blank−lines

ignore changes whose lines are all blank

−I, −−ignore−matching−lines=RE

ignore changes all whose lines match RE


strip trailing carriage return on input

−a, −−text

treat all files as text

−w, −−width=NUM

output at most NUM (default 130) print columns

−l, −−left−column

output only the left column of common lines

−s, −−suppress−common−lines

do not output common lines

−t, −−expand−tabs

expand tabs to spaces in output


tab stops at every NUM (default 8) print columns

−d, −−minimal

try hard to find a smaller set of changes

−H, −−speed−large−files

assume large files, many scattered small changes


use PROGRAM to compare files


display this help and exit

−v, −−version

output version information and exit

If a FILE is ’−’, read standard input. Exit status is 0 if inputs are the same, 1 if different, 2 if trouble.


Written by Thomas Lord.


Report bugs to: bug−diffutils [AT]
GNU diffutils home page: <>;
General help using GNU software: <>;


Copyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>;.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


cmp(1), diff(1), diff3(1)

The full documentation for sdiff is maintained as a Texinfo manual. If the info and sdiff programs are properly installed at your site, the command

info sdiff

should give you access to the complete manual.