Show unified diff

bash

diff -u old.conf new.conf

Explanation

Unified diff format is the most common comparison output for reviews and patches.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Same sheet · prioritizing diff, cmp, and patch-Oriented Comparison

Find differences across two directory trees.

Open In sheetbashsame section

Compare files in two visual columns.

Open In sheetbashsame section

Detect exact byte-level differences.

Open In sheetbashsame section

Convert lines into command arguments.

Create chunks of 1000 lines each.

Count and rank repeated lines in a log.