Installing Jenkins

sudo apt update

2. Installing java

Install Java-Java 8 runtime environments, both 32-bit and 64-bit versions are supported.

sudo apt install openjdk-8-jdk   

For moving further after prerequisite for installing jenkins, follow the below steps:-

1. Repository key need to added to the system.

wget -q -O - https://pkg.jenkins.io/debian/jenkins-ci.org.key | sudo apt-key add -

If the above command shows error in downloading or it shows some repository portion missing, then execute the below command

wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -

2. After adding key to system, the system returns OK. Next, We’ll append the Debian
package repository address to the server’s sources.list

echo deb https://pkg.jenkins.io/debian-stable binary/ | sudo tee /etc/apt/sources.list.d/jenkins.list

3. When both of these are in place, We’ll run update so that apt-get will use the new repository:

sudo apt update

4. We’ll install Jenkins and its dependencies: – On Debian and Debian-based distributions like Ubuntu you can install Jenkins through apt command.

sudo apt-get install jenkins

Setting Up Jenkins

Setting Up Jenkins open the browser, type the domain or IP address followed by port 8080, http://your_ip_or_domain:8080, and screen (unlock Jenkins screen) similar to the following will be displayed

In the terminal, type the following cat command to see the password:

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

Copy the password from the terminal and paste it into the “Administrator password” field and then click continue. After that the screen presents the option of install suggested plug-in or select specific plug-in (as per best practices, click on install suggested plug-in)

It’s time to create an admin account to login to Jenkins:

Save and Finish