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Diff

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Reference:man7.org

Syntax

shell

diff OPTIONS FROM_FILE TO_FILE

Option	Description
`-y` `--side-by-side`	Output in two columns.
`-t` `--expand-tabs`	Expand tabs to spaces in output.
`-u` `-U` `--unified`	Output NUM (default 3) lines of unified context (git like).
`-Z` `--ignore-trailing-space`	Ignore white space at line end.
`--color`	Colorize the output; Can be `never` `always` `auto`.
`--suppress-common-lines`	Do not output common lines.

See the difference similarly to git diff --no-index.

shell

diff -u --color=always FROM_FILE TO_FILE | less -R