1. Install Jenkins
First, you will need to install Jenkins on your server. This can be done in a variety of ways depending on your OS. Here is an example of how to install Jenkins on Ubuntu 16.04:
a. Add the repository key to the system:
$ wget -q -O – https://pkg.jenkins.io/debian/jenkins-ci.org.key | sudo apt-key add –
b. Add the Jenkins repository to the system sources list:
$ sudo sh -c ‘echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list’
c. Update the system:
$ sudo apt-get update
d. Install Jenkins:
$ sudo apt-get install jenkins
2. Configure Jenkins
Once Jenkins is installed, you will need to configure it. This can be done via the web interface or the command line. Here is an example of how to configure Jenkins via the command line:
a. Create a Jenkins user:
$ sudo adduser jenkins
b. Add the Jenkins user to the sudo group:
$ sudo usermod -aG sudo jenkins
c. Set the Jenkins user password:
$ sudo passwd jenkins
d. Set up the Jenkins environment variables:
$ sudo echo “JENKINS_HOME=/var/lib/jenkins” >> /etc/environment
e. Set up the Jenkins configuration file:
$ sudo cp /etc/default/jenkins /etc/default/jenkins.bak
$ sudo nano /etc/default/jenkins
f. Change the JENKINS_USER variable to jenkins:
JENKINS_USER=jenkins
g. Change the JENKINS_PORT variable to 8080:
JENKINS_PORT=8080
h. Save the file and exit.
3. Start Jenkins
Once Jenkins is configured, you can start it:
$ sudo service jenkins start
4. Access the Jenkins Web Interface
Now you can access the Jenkins web interface by going to http://your-server-ip:8080. You will be asked to enter the initial admin password. You can find this in the /var/lib/jenkins/secrets/initialAdminPassword file.
Once you enter the password, you will be able to configure Jenkins and create jobs.