For Ubuntu package install, run the following commands in a terminal:

    apt install software-properties-common apt-transport-https

For Ubuntu 14.04 (Trusty Tahr), run:

    apt-add-repository https://cinelerra-gg.org/download/pkgs/ub14

Then run these commands to install it:

    apt update
    apt install cin

Ubuntu 14 also has a 32-bit package available.   Use similar instructions as for Ubuntu 14.04 above.

For versions 16 and later, first edit the file /etc/apt/sources.list to make sure the added line contains [trusted=yes].

  The line for Ubuntu 16 should be:

    deb [trusted=yes] https://cinelerra-gg.org/download/pkgs/ub16 xenial main

  The line for Ubuntu 17 should be:

    deb [trusted=yes] https://cinelerra-gg.org/download/pkgs/ub17 zesty main

  The line for Ubuntu 18 should be:

    deb [trusted=yes] https://cinelerra-gg.org/download/pkgs/ub18 bionic main

Next for Ubuntu 16.04 (Xenial Xerus), run:

    apt-add-repository https://cinelerra-gg.org/download/pkgs/ub16

Next for Ubuntu 17.04 (Zesty Zapus), run:

    apt-add-repository https://cinelerra-gg.org/download/pkgs/ub17

Next for Ubuntu 18.04 (Bionic Beaver), run:

    apt-add-repository https://cinelerra-gg.org/download/pkgs/ub18

Then run these commands to install it:

    apt update
    apt install cin

To update a previous install, run:

    apt update
    apt upgrade cin

To remove Cinelerra-GG, run:

    apt remove cin