OptionsOn diff itself
-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--ignore-matching-lines
Ignore changes whose lines all match RE <RE>
--strip-trailing-cr
Strip trailing carriage return on input
-a--text
Treat all files as text
-c-C--context
Output NUM lines of copied context <NUM>
-u-U--unified
Output NUM lines of unified context <NUM>
--label
Use LABEL instead of file name <LABEL>
-p--show-c-function
Show which C function each change is in
-F--show-function-line
Show the most recent line matching RE <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--width
Output at most NUM (default 130) print columns <NUM>
--left-column
Output only the left column of common lines
--suppress-common-lines
Do not output common lines
-D--ifdef
Output merged file to show `#ifdef NAME' diffs <NAME>
-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
-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--exclude
Exclude files that match PAT <PAT>
-X--exclude-from
Exclude files that match any pattern in FILE <FILE>
-S--starting-file
Start with FILE when comparing directories <FILE>
--from-file
Compare FILE1 to all operands. FILE1 can be a directory <FILE1>
--to-file
Compare all operands to FILE2. FILE2 can be a directory <FILE2>
--horizon-lines
Keep NUM lines of the common prefix and suffix <NUM>
-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
--old-group-format
Similar, but format old input groups with GFTM <GFTM>
--new-group-format
Similar, but format new input groups with GFTM <GFTM>
--unchanged-group-format
Similar, but format unchanged input groups with GFTM <GFTM>
--changed-group-format
Similar, but format changed input groups with GFTM <GFTM>
--line-format
Format all input lines with LFMT <LFTM>
--old-line-format
Format old input lines with LFTM <LFTM>
--new-line-format
Format new input lines with LFTM <LFTM>
--unchanged-line-format
Format unchanged input lines with LFTM <LFTM>
