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diff(1) [linux man page]

DIFF(1) 							   User Commands							   DIFF(1)

NAME
diff - compare files line by line SYNOPSIS
diff [OPTION]... FILES DESCRIPTION
Compare files line by line. -i --ignore-case Ignore case differences in file contents. --ignore-file-name-case Ignore case when comparing file names. --no-ignore-file-name-case Consider case when comparing file names. -E --ignore-tab-expansion Ignore changes due to tab expansion. -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 RE --ignore-matching-lines=RE Ignore changes whose lines all match RE. --strip-trailing-cr Strip trailing carriage return on input. -a --text Treat all files as text. -c -C NUM --context[=NUM] Output NUM (default 3) lines of copied context. -u -U NUM --unified[=NUM] Output NUM (default 3) lines of unified context. --label LABEL Use LABEL instead of file name. -p --show-c-function Show which C function each change is in. -F RE --show-function-line=RE Show the most recent line matching RE. -q --brief Output only whether files differ. -e --ed Output an ed script. --normal Output a normal diff. -n --rcs Output an RCS format diff. -y --side-by-side Output in two columns. -W NUM --width=NUM Output at most NUM (default 130) print columns. --left-column Output only the left column of common lines. --suppress-common-lines Do not output common lines. -D NAME --ifdef=NAME Output merged file to show `#ifdef NAME' diffs. --GTYPE-group-format=GFMT Similar, but format GTYPE input groups with GFMT. --line-format=LFMT Similar, but format all input lines with LFMT. --LTYPE-line-format=LFMT Similar, but format LTYPE input lines with LFMT. LTYPE is `old', `new', or `unchanged'. GTYPE is LTYPE or `changed'. GFMT may contain: %< lines from FILE1 %> lines from FILE2 %= lines common to FILE1 and FILE2 %[-][WIDTH][.[PREC]]{doxX}LETTER printf-style spec for LETTER LETTERs are as follows for new group, lower case for old group: F first line number L last line number N number of lines = L-F+1 E F-1 M L+1 LFMT may contain: %L contents of line %l contents of line, excluding any trailing newline %[-][WIDTH][.[PREC]]{doxX}n printf-style spec for input line number Either GFMT or LFMT may contain: %% % %c'C' the single character C %c'OOO' the character with octal code OOO -l --paginate Pass the output through `pr' to paginate it. -t --expand-tabs Expand tabs to spaces in output. -T --initial-tab Make tabs line up by prepending a tab. --tabsize=NUM Tab stops are every NUM (default 8) print columns. --suppress-blank-empty Suppress space or tab before empty output lines. -r --recursive Recursively compare any subdirectories found. -N --new-file Treat absent files as empty. --unidirectional-new-file Treat absent first files as empty. -s --report-identical-files Report when two files are the same. -x PAT --exclude=PAT Exclude files that match PAT. -X FILE --exclude-from=FILE Exclude files that match any pattern in FILE. -S FILE --starting-file=FILE Start with FILE when comparing directories. --from-file=FILE1 Compare FILE1 to all operands. FILE1 can be a directory. --to-file=FILE2 Compare all operands to FILE2. FILE2 can be a directory. --horizon-lines=NUM Keep NUM lines of the common prefix and suffix. -d --minimal Try hard to find a smaller set of changes. --speed-large-files Assume large files and many scattered small changes. -v --version Output version info. --help Output this help. FILES are `FILE1 FILE2' or `DIR1 DIR2' or `DIR FILE...' or `FILE... DIR'. If --from-file or --to-file is given, there are no restrictions on FILES. If a FILE is `-', read standard input. Exit status is 0 if inputs are the same, 1 if different, 2 if trouble. AUTHOR
Written by Paul Eggert, Mike Haertel, David Hayes, Richard Stallman, and Len Tower. REPORTING BUGS
Report bugs to: bug-diffutils@gnu.org GNU diffutils home page: <http://www.gnu.org/software/diffutils/> General help using GNU software: <http://www.gnu.org/gethelp/> COPYRIGHT
Copyright (C) 2010 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 permitted by law. SEE ALSO
The full documentation for diff is maintained as a Texinfo manual. If the info and diff programs are properly installed at your site, the command info diff should give you access to the complete manual. diffutils 2.9.19-4065 April 2010 DIFF(1)

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