Ensure that you have the upgrade tool installed:
$ sudo apt install update-manager-core
Reading package lists... Done
Building dependency tree
Reading state information... Done
update-manager-core is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Run the upgrade tool. In my case it didn't work:
$ sudo do-release-upgrade
Checking for a new Ubuntu release
No new release found
Edit configuration to allow upgrades to non-LTS versions (change "lts" -> "normal"):
$ sudo nano /etc/update-manager/release-upgrades
Try again:
$ sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [198 B]
Get:2 Upgrade tool [1 147 kB]
Fetched 1 148 kB in 0s (0 B/s)
authenticate 'utopic.tar.gz' against 'utopic.tar.gz.gpg'
extracting 'utopic.tar.gz'
...
Don't forget to re-enable repositories which could have been disabled after the upgrade.
Thanks. Took 20 minutes of searching to find the solution to this. Had the same error with "No release found." Is it that big of an issue to go back and forth between LTS and normal releases?
ReplyDeleteI think it's the intented behaviour -- if you are using an LTS you want to upgrade only to the next LTS version.
ReplyDeletehttp://askubuntu.com/a/461235/7064
https://help.ubuntu.com/community/PreciseUpgrades#Network_Upgrade_for_Ubuntu_Servers_.28Recommended.29
Very awesome. Thanks, Victor!
ReplyDelete