Installing Jenkins on CentOS 7

Jenkins is an open-source automation server that helps automate the building, testing, and deployment of software. It allows developers to continuously integrate code changes and automate the delivery of applications, providing a streamlined and efficient development process.

Here are the steps to install Jenkins on CentOS 7:

1. Update the system packages by running the following command in the terminal:
   sudo yum update
2. Add the Jenkins repository by creating a new file called 'jenkins.repo' in the '/etc/yum.repos.d/' directory with the following content:
   [jenkins]
name=Jenkins
baseurl=https://pkg.jenkins.io/redhat-stable
gpgcheck=1
enabled=1
gpgkey=https://pkg.jenkins.io/redhat-stable/jenkins.io.key
3. Install Jenkins by running the following command:
   sudo yum install jenkins
4. Start the Jenkins service by executing the following command:
   sudo systemctl start jenkins
5. Enable the Jenkins service to start on boot:
   sudo systemctl enable jenkins
6. Allow inbound traffic on port 8080 (the default Jenkins port) by running the following command:
   sudo firewall-cmd --permanent --zone=public --add-port=8080/tcp
7. Reload the firewall configuration:
   sudo firewall-cmd --reload
8. Access Jenkins using your preferred web browser by visiting 'http://your_server_ip:8080'.
9. Unlock Jenkins by retrieving the initial administrator password from the server by executing:
   sudo cat /var/lib/jenkins/secrets/initialAdminPassword
10. Follow the instructions provided by the Jenkins setup wizard to complete the installation and set up your administrator account.

Now you have successfully installed Jenkins on your CentOS 7 server. You can further explore its features and start automating your software development processes.