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+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.40.4.
+.TH DIFF "1" "January 2024" "diffutils 3.10" "User Commands"
+.SH NAME
+diff \- compare files line by line
+.SH SYNOPSIS
+.B diff
+[\fIOPTION\fR]... \fIFILES\fR
+.SH DESCRIPTION
+Compare FILES line by line.
+.PP
+Mandatory arguments to long options are mandatory for short options too.
+.TP
+\fB\-\-normal\fR
+output a normal diff (the default)
+.TP
+\fB\-q\fR, \fB\-\-brief\fR
+report only when files differ
+.TP
+\fB\-s\fR, \fB\-\-report\-identical\-files\fR
+report when two files are the same
+.TP
+\fB\-c\fR, \fB\-C\fR NUM, \fB\-\-context\fR[=\fINUM\fR]
+output NUM (default 3) lines of copied context
+.TP
+\fB\-u\fR, \fB\-U\fR NUM, \fB\-\-unified\fR[=\fINUM\fR]
+output NUM (default 3) lines of unified context
+.TP
+\fB\-e\fR, \fB\-\-ed\fR
+output an ed script
+.TP
+\fB\-n\fR, \fB\-\-rcs\fR
+output an RCS format diff
+.TP
+\fB\-y\fR, \fB\-\-side\-by\-side\fR
+output in two columns
+.TP
+\fB\-W\fR, \fB\-\-width\fR=\fINUM\fR
+output at most NUM (default 130) print columns
+.TP
+\fB\-\-left\-column\fR
+output only the left column of common lines
+.TP
+\fB\-\-suppress\-common\-lines\fR
+do not output common lines
+.TP
+\fB\-p\fR, \fB\-\-show\-c\-function\fR
+show which C function each change is in
+.TP
+\fB\-F\fR, \fB\-\-show\-function\-line\fR=\fIRE\fR
+show the most recent line matching RE
+.TP
+\fB\-\-label\fR LABEL
+use LABEL instead of file name and timestamp
+(can be repeated)
+.TP
+\fB\-t\fR, \fB\-\-expand\-tabs\fR
+expand tabs to spaces in output
+.TP
+\fB\-T\fR, \fB\-\-initial\-tab\fR
+make tabs line up by prepending a tab
+.TP
+\fB\-\-tabsize\fR=\fINUM\fR
+tab stops every NUM (default 8) print columns
+.TP
+\fB\-\-suppress\-blank\-empty\fR
+suppress space or tab before empty output lines
+.TP
+\fB\-l\fR, \fB\-\-paginate\fR
+pass output through 'pr' to paginate it
+.TP
+\fB\-r\fR, \fB\-\-recursive\fR
+recursively compare any subdirectories found
+.TP
+\fB\-\-no\-dereference\fR
+don't follow symbolic links
+.TP
+\fB\-N\fR, \fB\-\-new\-file\fR
+treat absent files as empty
+.TP
+\fB\-\-unidirectional\-new\-file\fR
+treat absent first files as empty
+.TP
+\fB\-\-ignore\-file\-name\-case\fR
+ignore case when comparing file names
+.TP
+\fB\-\-no\-ignore\-file\-name\-case\fR
+consider case when comparing file names
+.TP
+\fB\-x\fR, \fB\-\-exclude\fR=\fIPAT\fR
+exclude files that match PAT
+.TP
+\fB\-X\fR, \fB\-\-exclude\-from\fR=\fIFILE\fR
+exclude files that match any pattern in FILE
+.TP
+\fB\-S\fR, \fB\-\-starting\-file\fR=\fIFILE\fR
+start with FILE when comparing directories
+.TP
+\fB\-\-from\-file\fR=\fIFILE1\fR
+compare FILE1 to all operands;
+FILE1 can be a directory
+.TP
+\fB\-\-to\-file\fR=\fIFILE2\fR
+compare all operands to FILE2;
+FILE2 can be a directory
+.TP
+\fB\-i\fR, \fB\-\-ignore\-case\fR
+ignore case differences in file contents
+.TP
+\fB\-E\fR, \fB\-\-ignore\-tab\-expansion\fR
+ignore changes due to tab expansion
+.TP
+\fB\-Z\fR, \fB\-\-ignore\-trailing\-space\fR
+ignore white space at line end
+.TP
+\fB\-b\fR, \fB\-\-ignore\-space\-change\fR
+ignore changes in the amount of white space
+.TP
+\fB\-w\fR, \fB\-\-ignore\-all\-space\fR
+ignore all white space
+.TP
+\fB\-B\fR, \fB\-\-ignore\-blank\-lines\fR
+ignore changes where lines are all blank
+.TP
+\fB\-I\fR, \fB\-\-ignore\-matching\-lines\fR=\fIRE\fR
+ignore changes where all lines match RE
+.TP
+\fB\-a\fR, \fB\-\-text\fR
+treat all files as text
+.TP
+\fB\-\-strip\-trailing\-cr\fR
+strip trailing carriage return on input
+.TP
+\fB\-D\fR, \fB\-\-ifdef\fR=\fINAME\fR
+output merged file with '#ifdef NAME' diffs
+.TP
+\fB\-\-GTYPE\-group\-format\fR=\fIGFMT\fR
+format GTYPE input groups with GFMT
+.TP
+\fB\-\-line\-format\fR=\fILFMT\fR
+format all input lines with LFMT
+.TP
+\fB\-\-LTYPE\-line\-format\fR=\fILFMT\fR
+format LTYPE input lines with LFMT
+.IP
+These format options provide fine\-grained control over the output
+.IP
+of diff, generalizing \fB\-D\fR/\-\-ifdef.
+.TP
+LTYPE is 'old', 'new', or 'unchanged'.
+GTYPE is LTYPE or 'changed'.
+.IP
+GFMT (only) may contain:
+.TP
+%<
+lines from FILE1
+.TP
+%>
+lines from FILE2
+.TP
+%=
+lines common to FILE1 and FILE2
+.TP
+%[\-][WIDTH][.[PREC]]{doxX}LETTER
+printf\-style spec for LETTER
+.IP
+LETTERs are as follows for new group, lower case for old group:
+.TP
+F
+first line number
+.TP
+L
+last line number
+.TP
+N
+number of lines = L\-F+1
+.TP
+E
+F\-1
+.TP
+M
+L+1
+.TP
+%(A=B?T:E)
+if A equals B then T else E
+.IP
+LFMT (only) may contain:
+.TP
+%L
+contents of line
+.TP
+%l
+contents of line, excluding any trailing newline
+.TP
+%[\-][WIDTH][.[PREC]]{doxX}n
+printf\-style spec for input line number
+.IP
+Both GFMT and LFMT may contain:
+.TP
+%%
+%
+.TP
+%c'C'
+the single character C
+.TP
+%c'\eOOO'
+the character with octal code OOO
+.TP
+C
+the character C (other characters represent themselves)
+.TP
+\fB\-d\fR, \fB\-\-minimal\fR
+try hard to find a smaller set of changes
+.TP
+\fB\-\-horizon\-lines\fR=\fINUM\fR
+keep NUM lines of the common prefix and suffix
+.TP
+\fB\-\-speed\-large\-files\fR
+assume large files and many scattered small changes
+.TP
+\fB\-\-color\fR[=\fIWHEN\fR]
+color output; WHEN is 'never', 'always', or 'auto';
+plain \fB\-\-color\fR means \fB\-\-color=\fR'auto'
+.TP
+\fB\-\-palette\fR=\fIPALETTE\fR
+the colors to use when \fB\-\-color\fR is active; PALETTE is
+a colon\-separated list of terminfo capabilities
+.TP
+\fB\-\-help\fR
+display this help and exit
+.TP
+\fB\-v\fR, \fB\-\-version\fR
+output version information and exit
+.PP
+FILES are 'FILE1 FILE2' or 'DIR1 DIR2' or 'DIR FILE' or 'FILE DIR'.
+If \fB\-\-from\-file\fR or \fB\-\-to\-file\fR is given, there are no restrictions on FILE(s).
+If a FILE is '\-', read standard input.
+Exit status is 0 if inputs are the same, 1 if different, 2 if trouble.
+.SH AUTHOR
+Written by Paul Eggert, Mike Haertel, David Hayes,
+Richard Stallman, and Len Tower.
+.SH "REPORTING BUGS"
+Report bugs to: bug\-diffutils@gnu.org
+.br
+GNU diffutils home page: <https://www.gnu.org/software/diffutils/>
+.br
+General help using GNU software: <https://www.gnu.org/gethelp/>
+.SH COPYRIGHT
+Copyright \(co 2023 Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+.br
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+.SH "SEE ALSO"
+.BR wdiff (1),
+.BR cmp (1),
+.BR diff3 (1),
+.BR sdiff (1),
+.BR patch (1)
+.PP
+The full documentation for
+.B diff
+is maintained as a Texinfo manual.  If the
+.B info
+and
+.B diff
+programs are properly installed at your site, the command
+.IP
+.B info diff
+.PP
+should give you access to the complete manual.