Ubuntu, install jdk 1.8.x

$sudo add-apt-repository ppa:webupd8team/java
$sudo apt-get update
$sudo apt-get install oracle-java8-installer

You will see some agreement, yes to all

After installation finished,
$java -version

java version "1.8.0_72"

Java(TM) SE Runtime Environment (build 1.8.0_72-b15)

Java HotSpot(TM) 64-Bit Server VM (build 25.72-b15, mixed mode)

Good luck!

upgrade ubuntu server 11.10 to 12.04LTS

ubuntu server 11.10

Distributor ID: Ubuntu
Description:    Ubuntu 11.10
Release:        11.10
Codename:       oneiric

codename is "Oneiric Ocelot"
https://help.ubuntu.com/community/PreciseUpgrades#Network_Upgrade_for_Ubuntu_Servers_.28Recommended.29

ubuntu page can help u for upgrade server

u can check codename using this command

$lsb_relese -a

Distributor ID: Ubuntu
Description:    Ubuntu 11.10
Release:        11.10
Codename:       oneiric

and upgrade command is

$do-release-upgrade

ref : http://www.howtoforge.com/how-to-upgrade-ubuntu-11.10-oneiric-ocelot-to-12.04-lts-precise-pangolin-desktop-and-server-p2

#this posting because ubuntu "apt-get install nodejs" is knocked on an open door