Before Upgrading You need to remember the following point
Take comple backup of your system before upgrading .Now you need to upgraded Ubuntu Edgy Machine to Ubuntu Feisty.
We can Use Two methods to upgrade Ubuntu Edgy to Ubuntu Feisty
1) Using GUI
2) Using apt-get
Upgrading Ubuntu Edgy to Ubuntu Feisty
Method 1 -- Using GUI
If you want to upgrade using GUI use the following command
gksu “update-manager -c ”
“-c” switch tells it to look for upgrades at all.
You should see the following screen here Now you can see 7.04 is available for upgrade click on upgrade
Now you should see the release notes as follows here you need to click on upgrade
Once you click on upgrade you might get the error "Authentication failed"
You need to fix the above error for this open the terminal and type the "gpg" and press enter once you see the following message
gpg:Go ahead and type your message ...
Press Ctrl+C and then start the install process again.
Now you should see the following screen downloading upgrade tool
You need to enter root password and click ok
Preparing the upgrade in progress
You need to confirm the upgrade process by clicking "Start Upgrade"
Download in progress for all the required packages for Upgrade
Installation in progress
If you click on Terminal to see detailed installation in progress
Cleaning Up is in Progress
You need to restart the system to complete the Upgrade by clicking "Restart Now"
Method 2 -- Using apt-get
Edit your /etc/apt/sources.list as root. Change every occurrence of edgy to feisty.
Use any prefered editor. If you have a CD-ROM line in your file, then remove it.
sudo vi /etc/apt/sources.list
use the following Simple command
sudo sed -e ’s/\edgy/ feisty/g’ -i /etc/apt/sources.list
Now you need to update the source list using the following command
sudo apt-get update
Upgrade using the following command
sudo apt-get dist-upgrade
Double check your process was finished properly using the following commd
sudo apt-get -f install
sudo dpkg --configure -a
Now you need to Reboot your machine to take your new ubuntu 7.04 installation to effect all changes.
Testing Your Upgrade
You can check the ubuntu version installed using the following command
sudo lsb_release -a
Output Looks like below
Distributor ID: Ubuntu
Description: Ubuntu feisty (development branch)
Just type the following command in your terminal
Output Lokks like below
Ubuntu feisty (development branch) \n \l