Installing Jenkins on Linux for the HCL VersionVault-Jenkins integration

Learn how to install Jenkins on Linux so that it can be integrated with HCL VersionVault.

Before you begin

Install the following items before you install Jenkins on Linux:

You must have a 64-bit Java Runtime Environment (JRE) specifically for Java 11 installed before you install Jenkins. If you do not have a JRE already, you can obtain one from Adoptium at https://adoptium.net/temurin/releases/?version=11. After you have installed Java:
- Set the path for the Java:
```
setenv PATH /opt/your-java/bin:${PATH}
```
- Set the Java path as a system environment variable:
```
setenv JAVA_HOME /opt/your-java/bin
```
You must install the HCL VersionVault Remote Client or HCL VersionVault before you install Jenkins and ensure that the system path includes /opt/hcl/ccm/versionvault/bin.

Use the following procedure to install Jenkins on Linux for the HCL VersionVault-Jenkins integration:

Download the jenkins.war file from https://get.jenkins.io/war-stable/ and place it in the home directory.
Note: VersionVault supports Jenkins LTS 2.332.x.
Execute the following commands:
1. mkdir JENKINS
2. chmod 777 JENKINS
3. cd JENKINS
4. cp ~user/jenkins-2.332.x.war .
5. ls to display the jenkins-2.332.x.war file
Run the following command:
```
java -jar jenkins.war --httpPort=8080
```
Notes:
- If you want to use SSL/TLS for your Jenkins server, consult the Jenkins documentation at https://www.jenkins.io/doc/book/installing/initial-settings to use other command line flags instead of the preceding mentioned command line flag.
- During the installation of Jenkins, logs and the initial password for Jenkins are created, as shown in the following example:
```
Jenkins initial setup is required. An admin user has been created and a password generated.
Example: Please use the following password to proceed to installation:
aabbccdd
```
Tip: Note the password because you need it to unlock Jenkins.
With Jenkins hosted on part 8080, open a web browser and go to http://hostname:8080 to be navigated to where you can unlock Jenkins. See Unlocking Jenkins on Linux.

You must unlock Jenkins on Linux and customize it before you can start using it.