NAME
diff - compare files line by line
SYNOPSIS
ddiiffff [OPTION]... FILES
DESCRIPTION
Compare files line by line.
-ii --iiggnnoorree-ccaassee
Ignore case differences in file contents.
--iiggnnoorree-ffiillee-nnaammee-ccaassee
Ignore case when comparing file names.
--nnoo-iiggnnoorree-ffiillee-nnaammee-ccaassee
Consider case when comparing file names.
-EE --iiggnnoorree-ttaabb-eexxppaannssiioonn
Ignore changes due to tab expansion.
-bb --iiggnnoorree-ssppaaccee-cchhaannggee
Ignore changes in the amount of white space.
-ww --iiggnnoorree-aallll-ssppaaccee
Ignore all white space.
-BB --iiggnnoorree-bbllaannkk-lliinneess
Ignore changes whose lines are all blank.
-II RE --iiggnnoorree-mmaattcchhiinngg-lliinneess=RE
Ignore changes whose lines all match RE.
--ssttrriipp-ttrraaiilliinngg-ccrr
Strip trailing carriage return on input.
-aa --tteexxtt
Treat all files as text.
-cc -CC NUM --ccoonntteexxtt[=NUM]
Output NUM (default 3) lines of copied context.
-uu -UU NUM --uunniiffiieedd[=NUM]
Output NUM (default 3) lines of unified context.
--llaabbeell LABEL
Use LABEL instead of file name.
-pp --sshhooww-cc-ffuunnccttiioonn
Show which C function each change is in.
-FF RE --sshhooww-ffuunnccttiioonn-lliinnee=RE
Show the most recent line matching RE.
-qq --bbrriieeff
Output only whether files differ.
-ee --eedd
Output an ed script.
--nnoorrmmaall
Output a normal diff.
-nn --rrccss
Output an RCS format diff.
-yy --ssiiddee-bbyy-ssiiddee
Output in two columns.
-WW NUM --wwiiddtthh=NUM
Output at most NUM (default 130) print columns.
--lleefftt-ccoolluummnn
Output only the left column of common lines.
--ssuupppprreessss-ccoommmmoonn-lliinneess
Do not output common lines.
-DD NAME --iiffddeeff=NAME
Output merged file to show `#ifdef NAME' diffs.
--GGTTYYPPEE-ggrroouupp-ffoorrmmaatt=GFMT
Similar, but format GTYPE input groups with GFMT.
--lliinnee-ffoorrmmaatt=LFMT
Similar, but format all input lines with LFMT.
--LLTTYYPPEE-lliinnee-ffoorrmmaatt=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
-ll --ppaaggiinnaattee
Pass the output through `pr' to paginate it.
-tt --eexxppaanndd-ttaabbss
Expand tabs to spaces in output.
-TT --iinniittiiaall-ttaabb
Make tabs line up by prepending a tab.
-rr --rreeccuurrssiivvee
Recursively compare any subdirectories found.
-NN --nneeww-ffiillee
Treat absent files as empty.
--uunniiddiirreeccttiioonnaall-nneeww-ffiillee
Treat absent first files as empty.
-ss --rreeppoorrtt-iiddeennttiiccaall-ffiilleess
Report when two files are the same.
-xx PAT --eexxcclluuddee=PAT
Exclude files that match PAT.
-XX FILE --eexxcclluuddee-ffrroomm=FILE
Exclude files that match any pattern in FILE.
-SS FILE --ssttaarrttiinngg-ffiillee=FILE
Start with FILE when comparing directories.
--ffrroomm-ffiillee=FILE1
Compare FILE1 to all operands. FILE1 can be a directory.
--ttoo-ffiillee=FILE2
Compare all operands to FILE2. FILE2 can be a directory.
--hhoorriizzoonn-lliinneess=NUM
Keep NUM lines of the common prefix and suffix.
-dd --mmiinniimmaall
Try hard to find a smaller set of changes.
--ssppeeeedd-llaarrggee-ffiilleess
Assume large files and many scattered small changes.
-vv --vveerrssiioonn
Output version info.
--hheellpp Output this help.
FILES are `FILE1 FILE2' or `DIR1 DIR2' or `DIR FILE...' or `FILE...
DIR'. If --ffrroomm-ffiillee or --ttoo-ffiillee is given, there are no restrictions
on FILES. If a FILE is `-', read standard input.
AUTHOR Written by Paul Eggert, Mike Haertel, David Hayes, Richard Stallman,
and Len Tower.
REPORTING BUGS
Report bugs to .
COPYRIGHT Copyright (C) 2002 Free Software Foundation, Inc.
This program comes with NO WARRANTY, to the extent permitted by law.
You may redistribute copies of this program under the terms of the GNU
General Public License. For more information about these matters, see
the file named COPYING.
SEE ALSO
The full documentation for ddiiffff is maintained as a Texinfo manual. If
the iinnffoo and ddiiffff programs are properly installed at your site, the
command
iinnffoo ddiiffff
should give you access to the complete manual.
diffutils 2.8.1 April 2002 DIFF(1)