• On Debian-based distributions, such as Ubuntu, you can install Jenkins through apt-get.

• 使用apt方式在給予debian的linux發行版上搭建jenkins；

• Recent versions are available in an apt repository. Older but stable LTS versions are in this apt repository.

• 最新版本的安裝包可以在apt倉庫中下載；

• You need to have a JDK and JRE installed. openjdk-7-jre and openjdk-7-jdk are suggested. As of 2011-08 gcj is known to be problematic - see

  https://issues.jenkins-ci.org/browse/JENKINS-743.

• 需要安裝jdk環境，因為jenkins是java專案；建議安裝openjdk 7以上版本；

• Please make sure to back up any current Hudson or Jenkins files you may have.

• 注意：備份好你之前的jenkins檔案，以免丟失！！

Installation 安裝

# wget -q -O - https://pkg.jenkins.io/debian/jenkins-ci.org.key | sudo apt-key add -
 

# sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
# sudo apt-get update
# sudo apt-get install jenkins

Upgrade 升級jenkins

Once installed like this, you can update to the later version of Jenkins (when it comes out) by running the following commands:

sudo apt-get update
sudo apt-get install jenkins

(aptitude or apt-get doesn’t make any difference.)這兩種安裝方式會有所不；

• What does this package do? jenkins安裝包會執行一下操作；

• Jenkins will be launched as a daemon up on start. See /etc/init.d/jenkins for more details. 啟動一個守護程序；

• The ‘jenkins’ user is created to run this service. 建立一個jenkins使用者來允許jenkins服務（這個在使用jenkins的docker映象時要注意，因為docker預設用root使用者，所以需要docker run -u ‘jenkins_uid’ xxxx ）；

• Log file will be placed in /var/log/jenkins/jenkins.log. Check this file if you are troubleshooting Jenkins.
  /etc/default/jenkins will capture configuration parameters for the launch like e.g JENKINS_HOME

• By default, Jenkins listen on port 8080. Access this port with your browser to start configuration.預設監聽在8080埠，如果你機器上的8080埠被佔用你可以按照下面的方式配一個沒有佔用的埠給jenkins服務；
  If your /etc/init.d/jenkins file fails to start jenkins, edit the /etc/default/jenkins to replace the line

HTTP_PORT=8080  #預設

by

HTTP_PORT=8081  #修改位8081 當然你也可以配置其他空閒埠；

Here, 8081 was chosen but you can put another port available.

更進一步的配置可以在官方文件中查閱；建議查閱官方文件，好多百度的東西容易誤導！！

官方文件