How you can install Jenkins on a CentOS 7 or RHEL 7 system

 

How you can install Jenkins on a CentOS 7 or RHEL 7 system

Install OpenJDK 8 package

 sudo yum install java-1.8.0-openjdk-devel

 

1. Start by adding the Jenkins repository to your system's package manager:

sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo

2. Import the repository's GPG key:

sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

3. Install Jenkins and its dependencies:

sudo yum install jenkins

4. Start the Jenkins service and enable it to start automatically on boot:

sudo systemctl start jenkins
sudo systemctl enable jenkins

5. If you have a firewall enabled, you will need to open port 8080 to allow access to the Jenkins web interface:

sudo firewall-cmd --permanent --add-port=8080/tcp
sudo firewall-cmd --reload

6. Finally, you can access the Jenkins web interface by navigating to http://<your-server-ip>:8080 in a web browser.

Note: If you are using SELinux you need to set the correct context for the jenkins files, you can use the following command:

sudo chcon -R -t httpd_sys_content_t /var/lib/jenkins

Note: If you are using a proxy to connect to internet, you should configure jenkins to use the proxy.