The tool md5sum is as part of the coreutils package. You typically do not need to download it separately; simply open your terminal (Ctrl+Alt+T) and type md5sum --version to confirm it is ready for use. How to Use md5sum for Ubuntu Downloads
Verifying a download ensures the file is exactly as the publisher intended and was not corrupted during transfer. md5sum download for ubuntu
If a website provides a 32-character MD5 hash string (e.g., d8e8fca2dc0... ), you can manually compare it: The tool md5sum is as part of the coreutils package
Open the terminal and navigate to your download folder: cd ~/Downloads . Run the command on your file: md5sum filename.iso . md5sum download for ubuntu
Compare the resulting long string of characters to the one on the website. How to verify your Ubuntu download