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03_01.md

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-# Learning Jenkins, 03-01: Using a global build tool
-
-# Prerequisites
-You will need to configure Maven as a global build tool.
-
-In the Jenkins web interface, go to:
-
-`Manage Jenkins` -> `Global Tool Configuration` -> `Maven installations` -> `Add Maven`.
-
-Give your Maven installation a name and check the option to `Install automatically`.
-
-# Setting up the Jenkins Job
-Create a freestyle job and configure it as follows:
-
-1. Under `Source Code Management`, select `Git` and enter the following URL:
-```
-https://github.com/LinkedInLearning/learning-jenkins-3003221
-```
-2. **MAKE SURE TO SET THE `Branch Specifier` to `*/03_01`**.
-3. Add a build step using `Invoke Top-Level Maven Target`.
-4. Select the Maven version you configured in the previous step.
-5. For the goal, enter `package`.
-
-# WINDOWS SYSTEMS
-Select the `Execute Windows batch command` build step
-```
-java -cp target/hello-1.0-SNAPSHOT.jar com.learningjenkins.App
-```
-Save the job and start the build.
-
-[Follow this link for more details on Windows](WINDOWS.md)
-
-# MacOS, Linux, and Docker
-Select the `Execute shell` build step.
-```
-java -cp target/hello-1.0-SNAPSHOT.jar com.learningjenkins.App
-```
-Save the job and start the build.
-
-[Follow this link for more details on MacOS, Linux, and Docker](MAC_LINUX_DOCKER.md)
-
-# Troubleshooting Errors
-```
-ERROR: Couldn't find any revision to build. Verify the repository and branch configuration for this job.
-```
-This error means you have probably entered the wrong branch under Source Code Management.  You need to enter `*/03_01` for the branch.
-