meld

Graphical diffing and merging tool. More information: https://meldmerge.org/.

• Start meld:

meld

• Compare 2 files:

meld {{path/to/file_1}} {{path/to/file_2}}

• Compare 2 directories:

meld {{path/to/directory_1}} {{path/to/directory_2}}

• Compare 3 files:

meld {{path/to/file_1}} {{path/to/file_2}} {{path/to/file_3}}

• Open a comparison as a new tab in a pre-existing meld instance:

meld --newtab {{path/to/file_1}} {{path/to/file_2}}

• Compare multiple sets of files:

meld --diff {{path/to/file_1}} {{path/to/file_2}} --diff {{path/to/file_3}} {{path/to/file_4}}