Install Jenkins 2.49 on Ubuntu 14.04 Server

1.Update your system
sudo su
apt-get update

2.Install Nginx
apt-get install nginx -y
service nginx status

3.Install JDK
apt-get install openjdk-7-jdk -y
java -version

4.Install Jenkins
wget -q -O - https://jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add -
sh -c 'echo deb http://pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
apt-get update
apt-get install jenkins -y
service jenkins status
nano /etc/default/jenkins (check or modify it)
service jenkins start

5.Open Jenkins by web browser
http://localhost:8080

6.Get Administrator Password
nano /var/lib/jenkins/secrets/initialAdminPassword