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

Prerequisite : JDK and JRE over 1.7

Prerequisite: Install Java 8

Add java source list.

$ sudo vim /etc/apt/sources.list.d/java-8-debian.list
deb http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main
deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main

Import GPG key

$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886

Install Java 8

$ sudo apt-get update
$ sudo apt-get install oracle-java8-installer
$ java -version


Installation

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

Try browsing <host_name>:8080

https://wiki.jenkins.io/display/JENKINS/Installing+Jenkins+on+Ubuntu

Initial Setup

First login

initial login is:
Account : admin
Passwd :(Check /var/lib/jenkins/secrets/initialAdminPassword)

Home Dir

/var/lib/jenkins

Process Management

start | stop | status | restart | force-reload jenkins,

$ service jenkins {start|stop|status|restart|force-reload}

or

$ sudo /etc/init.d/jenkins {start|stop|status|restart|force-reload}

User Management

  1. From home_dir(/var/lib/jenkins)/config.xml, edit <useSecurity>false</useSecurity>
  2. From Web Console, Goto Manage Jenkins > Configure Global Security.
  3. Select the “Enable Security” check box.
  4. Select “Jenkins Own User Database” for the security realm and then select “Logged in Users can do anything” (or “matrix based strategy” for multiple users with different permissions) for the Authorization.