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+# Key CI/CD/Jenkins Concepts and their Usage
+
+## Installing Jenkins
+
+1. Download the [latest stable Jenkins WAR file](http://mirrors.jenkins.io/war-stable/latest/jenkins.war).
+2. Open a terminal and navigate to the directory containing the WAR file.
+3. Run the command `java -jar jenkins.war` to start Jenkins on port 8080. Provide the `--httpPort` option if you experience a port conflict e.g. `java -jar jenkins.war --httpPort=9999`. After a couple of seconds you should see the message ` Jenkins is fully up and running` in the log output.
+4. Open a browser of your choice and navigate to `localhost:<port>`. The default is `localhost:8080`.
+5. In the screen named "Unlock Jenkins", enter the password from the console output. Press the "Continue" button.
+6. In the screen named "Customize Jenkins", select the option "Install suggested plugins".
+7. In the screen named "Create First Admin User", enter all fields with credentials for your Jenkins administrator. Press the "Save and Continue" button.
+8. In the screen named "Instance Configuration", keep the default value. Press the "Save and Finish" button.
+9. You should see the message "Jenkins is ready!". Press the "Start using Jenkins" button. You'll be redirected to the Jenkins dashboard.
+
+<details><summary>Show Solution</summary>
+<p>
+
+First, start the Jenkins server. Copy the password printed in the log output to the clipboard.
+
+```bash
+$ java -jar jenkins.war
+Running from: /Users/bmuschko/dev/tools/jenkins-2.150.1/jenkins.war
+webroot: $user.home/.jenkins
+Jul 16, 2019 4:59:30 PM org.eclipse.jetty.util.log.Log initialized
+INFO: Logging initialized @501ms to org.eclipse.jetty.util.log.JavaUtilLog
+Jul 16, 2019 4:59:30 PM winstone.Logger logInternal
+INFO: Beginning extraction from war file
+Jul 16, 2019 4:59:32 PM org.eclipse.jetty.server.handler.ContextHandler setContextPath
+WARNING: Empty contextPath
+Jul 16, 2019 4:59:32 PM org.eclipse.jetty.server.Server doStart
+INFO: jetty-9.4.z-SNAPSHOT; built: 2019-02-15T16:53:49.381Z; git: eb70b240169fcf1abbd86af36482d1c49826fa0b; jvm 1.8.0_181-b13
+Jul 16, 2019 4:59:32 PM org.eclipse.jetty.webapp.StandardDescriptorProcessor visitServlet
+INFO: NO JSP Support for /, did not find org.eclipse.jetty.jsp.JettyJspServlet
+Jul 16, 2019 4:59:32 PM org.eclipse.jetty.server.session.DefaultSessionIdManager doStart
+INFO: DefaultSessionIdManager workerName=node0
+Jul 16, 2019 4:59:32 PM org.eclipse.jetty.server.session.DefaultSessionIdManager doStart
+INFO: No SessionScavenger set, using defaults
+Jul 16, 2019 4:59:32 PM org.eclipse.jetty.server.session.HouseKeeper startScavenging
+INFO: node0 Scavenging every 660000ms
+Jenkins home directory: /Users/bmuschko/.jenkins found at: $user.home/.jenkins
+Jul 16, 2019 4:59:34 PM org.eclipse.jetty.server.handler.ContextHandler doStart
+INFO: Started w.@21ec5d87{Jenkins v2.176.1,/,file:///Users/bmuschko/.jenkins/war/,AVAILABLE}{/Users/bmuschko/.jenkins/war}
+Jul 16, 2019 4:59:34 PM org.eclipse.jetty.server.AbstractConnector doStart
+INFO: Started ServerConnector@388ffbc2{HTTP/1.1,[http/1.1]}{0.0.0.0:8080}
+Jul 16, 2019 4:59:34 PM org.eclipse.jetty.server.Server doStart
+INFO: Started @4486ms
+Jul 16, 2019 4:59:34 PM winstone.Logger logInternal
+INFO: Winstone Servlet Engine v4.0 running: controlPort=disabled
+Jul 16, 2019 4:59:35 PM jenkins.InitReactorRunner$1 onAttained
+INFO: Started initialization
+Jul 16, 2019 4:59:35 PM jenkins.InitReactorRunner$1 onAttained
+INFO: Listed all plugins
+Jul 16, 2019 4:59:36 PM jenkins.InitReactorRunner$1 onAttained
+INFO: Prepared all plugins
+Jul 16, 2019 4:59:36 PM jenkins.InitReactorRunner$1 onAttained
+INFO: Started all plugins
+Jul 16, 2019 4:59:36 PM jenkins.InitReactorRunner$1 onAttained
+INFO: Augmented all extensions
+Jul 16, 2019 4:59:37 PM jenkins.InitReactorRunner$1 onAttained
+INFO: Loaded all jobs
+Jul 16, 2019 4:59:37 PM hudson.model.AsyncPeriodicWork$1 run
+INFO: Started Download metadata
+Jul 16, 2019 4:59:37 PM hudson.util.Retrier start
+INFO: Attempt #1 to do the action check updates server
+Jul 16, 2019 4:59:38 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
+INFO: Refreshing org.springframework.web.context.support.StaticWebApplicationContext@54fe6e54: display name [Root WebApplicationContext]; startup date [Tue Jul 16 16:59:38 MDT 2019]; root of context hierarchy
+Jul 16, 2019 4:59:38 PM org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
+INFO: Bean factory for application context [org.springframework.web.context.support.StaticWebApplicationContext@54fe6e54]: org.springframework.beans.factory.support.DefaultListableBeanFactory@3e77b308
+Jul 16, 2019 4:59:38 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
+INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@3e77b308: defining beans [authenticationManager]; root of factory hierarchy
+Jul 16, 2019 4:59:38 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
+INFO: Refreshing org.springframework.web.context.support.StaticWebApplicationContext@2b22ca16: display name [Root WebApplicationContext]; startup date [Tue Jul 16 16:59:38 MDT 2019]; root of context hierarchy
+Jul 16, 2019 4:59:38 PM org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
+INFO: Bean factory for application context [org.springframework.web.context.support.StaticWebApplicationContext@2b22ca16]: org.springframework.beans.factory.support.DefaultListableBeanFactory@28d4e2d4
+Jul 16, 2019 4:59:38 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
+INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@28d4e2d4: defining beans [filter,legacy]; root of factory hierarchy
+Jul 16, 2019 4:59:38 PM jenkins.install.SetupWizard init
+INFO:
+
+*************************************************************
+*************************************************************
+*************************************************************
+
+Jenkins initial setup is required. An admin user has been created and a password generated.
+Please use the following password to proceed to installation:
+
+34155b26571e4a2eb6eca68ddc4d5749
+
+This may also be found at: /Users/bmuschko/.jenkins/secrets/initialAdminPassword
+
+*************************************************************
+*************************************************************
+*************************************************************
+
+Jul 16, 2019 4:59:42 PM hudson.model.UpdateSite updateData
+INFO: Obtained the latest update center data file for UpdateSource default
+Jul 16, 2019 4:59:42 PM hudson.model.UpdateSite updateData
+INFO: Obtained the latest update center data file for UpdateSource default
+Jul 16, 2019 4:59:43 PM jenkins.InitReactorRunner$1 onAttained
+INFO: Completed initialization
+Jul 16, 2019 4:59:43 PM hudson.model.DownloadService$Downloadable load
+INFO: Obtained the updated data file for hudson.tasks.Maven.MavenInstaller
+Jul 16, 2019 4:59:43 PM hudson.util.Retrier start
+INFO: Performed the action check updates server successfully at the attempt #1
+Jul 16, 2019 4:59:43 PM hudson.model.AsyncPeriodicWork$1 run
+INFO: Finished Download metadata. 5,856 ms
+Jul 16, 2019 4:59:43 PM hudson.UDPBroadcastThread run
+INFO: Cannot listen to UDP port 33,848, skipping: java.net.SocketException: Can't assign requested address
+Jul 16, 2019 4:59:43 PM hudson.WebAppMain$3 run
+INFO: Jenkins is fully up and running
+```
+
+Paste the password from the clipboard into the password field.
+
+![Unlock Jenkins](./images/01-jenkins-installation/unlock-jenkins.png)
+
+Select the option to install recommended plugins.
+
+![Customize Jenkins](./images/01-jenkins-installation/customize-jenkins.png)
+
+The installation process will run for a couple of minutes.
+
+![Plugin Installation Progress](./images/01-jenkins-installation/plugin-installation-progress.png)
+
+Enter credentials for your first admin user.
+
+![First Admin User](./images/01-jenkins-installation/first-admin-user.png)
+
+Skip over the instance configuration step.
+
+![Instance Configuration](./images/01-jenkins-installation/instance-configuration.png)
+
+Jenkins indicates that it is ready for use.
+
+![Jenkins Is Ready](./images/01-jenkins-installation/jenkins-ready.png)
+
+The installation process is complete. You should land on the dashboard.
+
+![Jenkins Dashboard](./images/01-jenkins-installation/jenkins-dashboard.png)
+
+</p>
+</details>
\ No newline at end of file
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