Available via terminal (e.g., sudo apt install p7zip-full ). 2. Extract the Contents Right-click the file 818c44b3bcd88e626640.7z . Hover over 7-Zip (or your chosen app).

This guide explains how to handle the file .

The official, free, open-source tool from the 7-Zip Home Page .

If you have the "checksum" (SHA-256) provided by the sender, you can verify the file hasn't been tampered with.