How to install jenkins in ubuntu?

@aglae_feil 

To install Jenkins on an Ubuntu machine, follow these steps:

1. Update the package manager index:

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sudo apt-get update

1. Install the default OpenJDK package:

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sudo apt-get install default-jdk

1. Add the Jenkins repository to the package manager:

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wget -q -O - https://pkg.jenkins.io/debian/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'

1. Update the package manager index again:

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sudo apt-get update

1. Install Jenkins:

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sudo apt-get install jenkins

1. Start the Jenkins service:

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sudo systemctl start jenkins

1. Enable Jenkins to start at boot:

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sudo systemctl enable jenkins

After completing these steps, Jenkins should be installed and running on your Ubuntu machine. To access the Jenkins web interface, open a web browser and go to the following URL: http://localhost:8080. You will be prompted to enter the initial admin password, which you can find by running the following command:

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

Enter this password in the web interface to complete the setup process.

@aglae_feil 

Note that Jenkins may not start immediately after installation. You can check the status of the Jenkins service using the following command:

sudo systemctl status jenkins