https://www.pgadmin.org/download/

rpm
    https://www.pgadmin.org/download/pgadmin-4-rpm/
    sudo rpm -i https://ftp.postgresql.org/pub/pgadmin/pgadmin4/yum/pgadmin4-fedora-repo-2-1.noarch.rpm
    sudo yum install pgadmin4-desktop


apt/
    # Install the public key for the repository (if not done previously):
    sudo curl https://www.pgadmin.org/static/packages_pgadmin_org.pub | sudo apt-key add

    # Create the repository configuration file:
    sudo sh -c 'echo "deb https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/$(lsb_release -cs) pgadmin4 main" > /etc/apt/sources.list.d/pgadmin4.list && apt update'

    # Install for desktop mode only:
    sudo apt install pgadmin4-desktop

    # Install for web mode only:
    sudo apt install pgadmin4-web

    # Install for both desktop and web modes:
    sudo apt install pgadmin4

    https://www.pgadmin.org/download/pgadmin-4-apt/
    pgadmin4
        6.9 - both desktop and web
    pgadmin4-desktop
    pgadmin4-server
        ??? why do we need it
    https://gist.github.com/dweldon/cfe080d7cc189df3217dcc1c15ae96db
        https://askubuntu.com/questions/1286545/what-commands-exactly-should-replace-the-deprecated-apt-key
        https://www.pgadmin.org/download/pgadmin-4-apt/

    gpg_file="pgadmin4.gpg"

    wget https://www.pgadmin.org/static/packages_pgadmin_org.pub
    gpg --no-default-keyring --keyring ./temp-keyring.gpg --import packages_pgadmin_org.pub
    gpg --no-default-keyring --keyring ./temp-keyring.gpg --export --output "${gpg_file}"
    rm temp-keyring.*
    rm packages_pgadmin_org.pub
    sudo chown root:root "${gpg_file}"
    sudo mv "${gpg_file}" /etc/apt/keyrings/
    echo "deb [signed-by=/etc/apt/keyrings/${gpg_file}] https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/$(lsb_release -cs) pgadmin4 main" | sudo tee /etc/apt/sources.list.d/pgadmin4.list
    sudo apt-get update

    # Choose one of pgadmin4, pgadmin4-desktop, pgadmin4-web
    sudo apt-get install -y pgadmin4-desktop

apt-key
    https://zalinux.ru/?p=5066
    https://itsfoss.com/apt-key-deprecated/

2021
PythonToday - PostgreSQL and pgAdmin4 inst on Ubuntu of 8:18
    https://www.youtube.com/watch?v=kWUW3sMK0Mk