How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

in How To

This tutorial will describes how to upgrade Ubuntu Server 12.04.x to Ubuntu Server 14.04 LTS. As we know, Ubuntu Server 14.04 is the latest version of ubuntu server edition that released by canonical few month ago.

NOTE : Before starting upgrade to latest version of ubuntu server, make sure you have full backups you data and everything important on your ubuntu server to other remote system or backup drive. If you are using Ubuntu on VPS make sure take a server snapshot at your provider before upgrading. And we do not grantees the following tutorial will work for you properly.

Step 1: Updating Ubuntu Repository and Install Update Manager

Make sure your current ubuntu server  is fully up to date, doing it with the following command:

sudo apt-get update

Install update manager core package with these command:

sudo apt-get install update-manager-core

Step 2: Check Current Version of Ubuntu Server and Kernel Version

Run the following command to check current version of ubuntu server and kernel information that used ubuntu server

lsb_release -a

lsb release ubuntu server 12 04 How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

uname -a

kernel version of ubuntu server 12.04 How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

On this case, we are using Ubuntu Server 12.04.4 and kernel 3.8.0-29-generic

Step 3: Upgrade to Ubuntu Server 14.04 LTS

Type the following command to upgrade the Ubuntu server 12.04.4 to Ubuntu Server 14.04 LTS :

sudo do-release-upgrade -d

After execute command do-release-upgrade, it will showing the upgrade tool like the screenshot on below. Answer ” Y ” to upgrade.

checking package manager and starting additional SSH How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

During the upgrade prosess, you may be asked “Disable SSH password authentication for root?” answer “No” if you want to disable SSH password authentication after the upgrading finish

disable ssh password How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

Next, you may be asked “Restart services during package upgrades without asking?” answer yes if you won’t be asked on each library update.

restarting service during upgrade How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

The end of the installation you will be prompted to remove any obsolete packages, Answer ‘y’ to continue and remove. Hit ‘d’ to see details of these packages.

remove obsolete packages How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

Once remove obsolete packages is complete, you will get message “System upgrade is complete”. Congratulations, your Ubuntu Server 12.04 has now been upgraded to the Ubuntu Server 14.04 LTS. To complete the upgrade, reboot your Ubuntu Server by answering ‘Y’.

system upgrade is complete How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

Step 4 : Checking Version of Ubuntu Server and Kernel Version After Upgrade

Once your Ubuntu Server has been rebooted successfully, you need to check the version of ubuntu server and kernel version with the command “lsb_release -a” and “uname -r”.

lsb_release -a

lsb release ubuntu server 14.04 How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

uname -r

check kernel version ubuntu server 14.04 How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

The commands will confirm the Ubuntu Server that you are using is Ubuntu Server 14.04 LTS.

Optional: If you get information “No LSB modules are available “ after execute the command “lsb_release -a” . Fix this problem by installing “lsb_core” package:

sudo apt-get update
sudo apt-get install lsb-core

install lsb core ubuntu server 14.04 How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

Now run again the command lsb_release -a to check for LSB modules. You should get information of LSB version like the following screenshot.

lsb_release a

checking lsb release How to Upgrade Ubuntu Server 12.04 to Ubuntu Server 14.04 LTS

On this tutorial we also included video step by step upgrading ubuntu server 12.04 to ubuntu server 14.04. The following video created by LinuxScoop, original video can found here

Link Reference:

 

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