Ubuntu 18.04 add multiverse and universe repositories

1. Open the file /etc/apt/sources.list 2. Add the following lines: deb http://archive.ubuntu.com/ubuntu bionic multiverse deb http://archive.ubuntu.com/ubuntu bionic-security multiverse deb http://archive.ubuntu.com/ubuntu bionic-updates multiverse deb http://archive.ubuntu.com/ubuntu bionic universe deb http://archive.ubuntu.com/ubuntu bionic-security universe deb http://archive.ubuntu.com/ubuntu bionic-updates universe 3. Save the file. 4. Launch the following command to update the packages sudo apt update