How to install and Configure Jenkins on CentOS 7 and RHEL 7

First lets install some dependency

sudo yum install epel-release -y

sudo yum-config-manager --enable epel

sudo yum install java-1.8.0-openjdk-devel

Jenkins package is not available in the default CentOS and RHEL repositories. So we need to add jenkins repository using the beneath commands.

curl --silent --location http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo | sudo tee /etc/yum.repos.d/jenkins.repo

sudo rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key

Run the below yum command to install Jenkins.
```
yum install jenkins java-1.8.0-openjdk –y
```
Run the following systemctl commands to start and enable the jenkins service
```
systemctl start jenkins
```
```
systemctl enable jenkins
```