Few weeks back we showed you how to upgrade to Ubuntu 12.04 from 10.04. That tutorial showed you how to do it from Ubuntu Desktop. Doing it from the desktop is easy and is the best option for new users. To read that post, click here.
However, Ubuntu can also be upgraded via the command console and for some users, this method is the easiest and fastest. This brief tutorial will show you how to upgrade Ubuntu via the command console if you prefer this method.
Objectives:
- Upgrade to Ubuntu 12.04 (Precise Pangolin) from Ubuntu 10.04 (Lucid Lynx) via the Terminal
- Enjoy!
To get started, press Ctrl – Alt – T on your keyboard to open the Terminal. When it opens, run the commands below to install update-manager-core if isn’t already installed.
sudo apt-get install update-manager-core
Next, run the commands below to open update-manager’s release upgrade file.
sudo vi /etc/update-manager/release-upgrades
Then, change the line below from prompt=lts to prompt=normal. To change it, scroll down to the line press the X key on the keyboard to delete each character. Then hit the I key and begin typing the new line. When you’re done, press Esc key, then type :wq to save and exit.
Next, run the commands below to update all packages installed before you upgrade.
sudo apt-get update && sudo apt-get upgrade
Finally, run the commands below to begin the upgrade process.
sudo do-release-upgrade
When ask if you want to continue with the upgrade, type Y for yes.
Enjoy!
In my case, the above steps appeared to suceed until I tried “sudo do-release-upgrade”. Terminal:
#> sudo do-release-upgrade
Checking for a new ubuntu release
Failed Upgrade tool signature
Failed Upgrade tool
Done downloading Failed to fetch
Fetching the upgrade failed. There may be a network problem.
Any ideas?
Cheers,
Rob
I got the same error as Robz
These instructions fail, packages no longer on the server, lots of 404 failures
Before you do the do-release-upgrade, change the release-upgrades file back to the original as prompt=lts and then run do-release-upgrade.
It atleast started the upgrade process
This worked for me! Thanks a lot!
root@pcz-ee205855-2:~# do-release-upgrade
Traceback (most recent call last):
File “/usr/bin/do-release-upgrade”, line 10, in
from UpdateManager.Core.DistUpgradeFetcherCore import DistUpgradeFetcherCore
File “/usr/lib/python2.6/dist-packages/UpdateManager/Core/DistUpgradeFetcherCore.py”, line 34, in
import GnuPGInterface
ImportError: No module named GnuPGInterface
I tried this, but then got the following message:
An unresolvable problem occurred while calculating the upgrade:
E:Error, pkgProblemResolver::Resolve generated breaks, this may be
caused by held packages.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu
If none of this applies, then please report this bug against the
‘update-manager’ package and include the files in
/var/log/dist-upgrade/ in the bug report.
Restoring original system state
Aborting
Reading package lists… Done
Building dependency tree
Reading state information… Done
Building data structures… Done
Any idea what I can do ? I tried to install it before via the update manager but it always got stuck.
This fails at the last step. Probably because 10.04 is an LTS release.
I got:
Failed Upgrade tool signature
Failed Upgrade tool
Failed to fetch
Fetching the upgrade failed. There may be a network problem.
I got it to work by NOT changing the prompt=normal.
It should be prompt=lts
Thank you , very helpful to me