You want to install Jenkins on an Ubuntu Linux server without running an "apt-get upgrade" command. (You are ok with installing a "apt-transport-https" package.) What should you do?
See this posting because the directions work for Ubuntu in AWS and Debian in GCP.
(If you can run "apt-get upgrade", and you do not want to install "apt-transport-https", then see this posting to install Jenkins 2.x on Ubuntu Linux.)