Hi, Great work. the page:
https://www.pgadmin.org/download/pgadmin-4-apt/ has a series of commands one of which is to create a repository the line is: sudo sh -c 'echo "debhttps://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/$(lsb_release -cs) pgadmin4 main" > /etc/apt/sources.list.d/pgadmin4.list && apt update' I believe it should be: sudo sh -c 'echo "debhttps://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/bionic pgadmin4 main" > /etc/apt/sources.list.d/pgadmin4.list && apt update' based onWiduranga Dilruksha <https://stackoverflow.com/users/10081937/widuranga-dilruksha> reply here: https://stackoverflow.com/questions/68808730/the-repository-https-apt-postgresql-org-pub-repos-apt-trusty-pgdg-release-do best regards Robert
