Install lumen Code Review Tool on Ubuntu 26.04

The lumen is a terminal-based code review application for Git repositories that helps inspect changes directly from the command line. It displays code differences in a clean side-by-side interface, making it easier to compare modifications, and review updates. This tutorial explains how to install lumen code review tool on Ubuntu 26.04.

Install lumen

Download the latest release archive from the GitHub repository and extract the executable into /usr/local/bin:

curl -sSL https://github.com/jnsahaj/lumen/releases/latest/download/lumen-x86_64-unknown-linux-gnu.tar.gz \
  | sudo tar xz -C /usr/local/bin lumen

Confirm that the installation was completed successfully by checking lumen version:

lumen --version

Testing lumen

For testing purposes clone the repository and move to it:

git clone https://github.com/jnsahaj/lumen && cd lumen

Run lumen to review the changes introduced by the previous commit:

lumen diff HEAD~1

The command displays the selected Git diff in an interactive terminal interface, allowing efficient inspection of source code changes.

Uninstall lumen

If lumen is no longer needed, delete the executable from the system path:

sudo rm -rf /usr/local/bin/lumen