I'm running Ubuntu 13.04, and would like to upgrade to 14.04.
Entering the following commands gives me output indicating that it cannot be done.
$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 13.04 Release: 13.04 Codename: raring $ sudo do-release-upgrade Checking for a new Ubuntu release No new release found
How can this be done?
(I have the ISO file for 14.04 too, if that makes a difference)
As per the sugestion below, I tried this, to no avail?
$ sudo do-release-upgrade -d Checking for a new Ubuntu release No new release found
Further investigation revealed that updates were not working too.
$ sudo apt-get update # truncated E: Some index files failed to download. They have been ignored, or old ones used instead.
Are there any software sources that still host raring (13.04)?
Editing the software sources to point to
old-releases.ubuntu.com worked, enabling
sudo apt-get update && sudo apt-get dist-upgrade
To run as expected. However,
sudo do-release-upgrade -d
still yields the same result:
Checking for a new Ubuntu release No new release found