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Learning Jenkins, 01-05: Install Jenkins on Ubuntu

Prerequisites

The target system should be running a recent version of the Ubuntu operating system.

You will need to be able to access the system via CLI, most likely over SSH, and via HTTP on port 8080.

You will need to have root permission on the target system, specifically so you can run commands using sudo.

Installation

In a terminal, run the following commands:

curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key | \
  sudo tee /usr/share/keyrings/jenkins-keyring.asc > /dev/null

echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \
  https://pkg.jenkins.io/debian-stable binary/ | \
  sudo tee /etc/apt/sources.list.d/jenkins.list > /dev/null

sudo apt-get update -y

sudo apt-get -y install openjdk-11-jdk

sudo apt-get -y install jenkins

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Using the Initial Admin Password

Run the following command and copy the output:

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Open a browser to localhost:8080 and enter the initial admin password.