How to install Chromium web browser on Ubuntu or Debian

Chromium is a free and open source web browser which is what the Google Chrome is based on. They are very similar except that Chromium doesn't have the proprietary bits that are added to Google Chrome.

Chromium browser could be installed on Ubuntu and Debian by installing chromium-browser package using apt at the terminal.

1. Open terminal from the application launcher.
2. Update apt's package list from the repository.

   $ sudo apt update
   [sudo] password for user: 
   Hit:1 http://security.ubuntu.com/ubuntu focal-security InRelease
   Hit:2 http://jp.archive.ubuntu.com/ubuntu focal InRelease
   Get:3 http://jp.archive.ubuntu.com/ubuntu focal-updates InRelease [111 kB]
   Get:4 http://jp.archive.ubuntu.com/ubuntu focal-backports InRelease [98.3 kB]
   Fetched 210 kB in 2s (121 kB/s)
   Reading package lists... Done
   Building dependency tree       
   Reading state information... Done
   All packages are up to date.

3. Install chromium-browser package via apt.

   $ sudo apt install --assume-yes chromium-browser
   Reading package lists... Done
   Building dependency tree       
   Reading state information... Done
   The following NEW packages will be installed:
     chromium-browser
   0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
   Need to get 48.5 kB of archives.
   After this operation, 164 kB of additional disk space will be used.##
   ### snipped

4. Run chromium-browser from the terminal or from the application launcher.

   $ chromium-browser