install jdk
sudo dnf install java-17-amazon-corretto -y

enable Jenkins to start automatically once server started ok.

add inbound port 8080 for Jenkins:


then you can just access the Jenkins UI.
http://your_hostname:8080

sudo cat /var/lib/jenkins/secrets/initialAdminPassword
then input the password.

create user
install suggest plugin
Create First Admin User

go to manage Jenkins, then Plugins

install maven
manage Jenkins, then Tools