$ wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add - sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" >> /etc/apt/sources.list.d/pgdg.list'
$ sudo apt update
$ sudo apt install pgadmin4 pgadmin4-apache2 -y

Доступен по адресу: http://{server_ip}/pgadmin4/