Step‑by‑Step Guide to Installing and Configuring Jenkins on Linux

Jenkins is an open‑source automation server that provides an easy‑to‑use continuous integration system, freeing developers from complex integration tasks and allowing them to focus on core business logic. It can monitor builds in real time, generate detailed logs, send alerts, and display build trends and stability via charts.

Jenkins can create an automated CI environment that “automates” compiling, packaging, and deploying applications; it integrates with build tools such as Ant, Maven, Gradle, works with version‑control systems like SVN and Git, and can directly connect to popular code‑hosting platforms such as GitHub and Bitbucket.

1. Initialize the system environment – disable the firewall and SELinux.

2. Configure YUM repositories.

3. Install the Java runtime. yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel -y Verify the installation:

java -version

4. Install Jenkins by downloading the WAR file from the official mirror.

Download address: https://mirrors.tuna.tsinghua.edu.cn/jenkins/war-stable

5. Run Jenkins:

nohup java -jar jenkins.2.222.3.war > /tmp/jenkins.out 2>&1 &

6. Retrieve the initial admin password: more /root/.jenkins/secrets/initialAdminPassword 7. Log in to the Jenkins web UI.

Jenkins plugin repositories – international: https://updates.jenkins-ci.org/download/plugins; domestic (China): https://mirrors.tuna.tsinghua.edu.cn/jenkins/plugins.

Remember to change the default admin password after the first login.

Basic Jenkins Configuration