Jenkins, an open-source automation server, is a widely used platform for automating various tasks in the software development lifecycle. One of the key features of Jenkins is its extensibility through plugins, which enable users to add new functionality and integrations to their Jenkins instances. While plugins can be installed using the Jenkins web interface, administrators and advanced users might prefer to perform installations from the command line for scripting purposes or to integrate it into their continuous integration/continuous deployment (CI/CD) pipelines. In this blog post, we will explore how to install Jenkins plugins from the command line.

Before proceeding, make sure you have the following prerequisites:

Jenkins Command Line Interface (CLI) installed and configured. If not installed, you can download the CLI from the Jenkins web interface.

To start, open your terminal or command prompt and navigate to the directory where the Jenkins CLI is installed. By default, the Jenkins CLI is named jenkins-cli.jar. If you're unsure about its location, you can find it in the Jenkins server's root directory.

Before installing a plugin, you need to find its exact name and version. To do this, use the following command:

java -jar jenkins-cli.jar -s http://your-jenkins-server-url/ list-plugins

Replace http://your-jenkins-server-url/ with the URL of your Jenkins server. This command will list all the installed plugins along with their version numbers.

To install a Jenkins plugin, you can use the following command:

java -jar jenkins-cli.jar -s http://your-jenkins-server-url/ install-plugin plugin-name

Replace plugin-name with the actual name of the plugin you want to install. Ensure that the name is exactly the same as displayed in the plugin list obtained in Step 2.

Step 4: Installing a Specific Plugin Version

If you want to install a specific version of a plugin, you can specify the version number in the installation command as follows:

java -jar jenkins-cli.jar -s http://your-jenkins-server-url/ install-plugin plugin-name:version

Again, replace plugin-name with the name of the plugin and version with the desired version number.

After installing the plugin, Jenkins needs to be restarted for the changes to take effect. You can do this using the following command:

java -jar jenkins-cli.jar -s http://your-jenkins-server-url/ safe-restart

This command initiates a safe restart of Jenkins, ensuring that all running jobs are completed before the server restarts.

Installing Jenkins plugins from the command line provides a convenient way to automate plugin installations and integrate them into your CI/CD workflows. With the Jenkins CLI, you can easily find the necessary information about plugins and install specific versions as needed. Moreover, scripting the plugin installation process allows for easy version management and simplifies the setup of new Jenkins instances.

However, when using the command line to install plugins, ensure that you have the appropriate permissions and thoroughly test the compatibility of the plugins with your Jenkins version to avoid any potential conflicts or issues.

Today we learn how to install Jenkins plugins from the command line for streamlined automation and seamless integration with your CI/CD workflows.

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