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diff3 — Compare three files line by line. More information: <https://www.gnu.org/software/diffutils/manual/d

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commanddiff3filesclithreecompareline

linux

Problem

How to use the diff3 command: Compare three files line by line. More information: <https://www.gnu.org/software/diffutils/manual/diffutils.html#Invoking-diff3>.

Solution

diff3 — Compare three files line by line. More information: <https://www.gnu.org/software/diffutils/manual/diffutils.html#Invoking-diff3>.

Compare files:

diff3 {{path/to/file1}} {{path/to/file2}} {{path/to/file3}}

Show all changes, outlining conflicts:

diff3 {{[-A|--show-all]}} {{path/to/file1}} {{path/to/file2}} {{path/to/file3}}

Code Snippets

Compare files

diff3 {{path/to/file1}} {{path/to/file2}} {{path/to/file3}}

Show all changes, outlining conflicts

diff3 {{[-A|--show-all]}} {{path/to/file1}} {{path/to/file2}} {{path/to/file3}}

Context

tldr-pages: linux/diff3

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