You will need to have root permission on the target system, specifically so you can run commands using sudo.
In a terminal, run the following commands:
wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
sudo sh -c 'echo deb https://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
sudo apt-get update -y
sudo apt-get -y install openjdk-11-jdk
sudo apt-get install jenkins
cat /var/lib/jenkins/secrets/initialAdminPassword
Run the following command and copy the output:
cat /var/lib/jenkins/secrets/initialAdminPassword
Open a browser to localhost:8080 and enter the initial admin password.