Upgrade from 20.10 to 21.04


Been running mate 20.10 for quite some time. Now wanting to upgrade to 21.04, but not being offered the upgrade. Followed the support article, software is up to date. Components for 21.04 are installed, but mate still identies as 20.10.

Already removed other repositories, to no avail.

Any help would be appreciated.

Welcome to the Ubuntu MATE community!

What output of cat /etc/os-release and grep ^deb -r /etc/apt/ --include=*.list do you have?

On current stage you can run the upgrade from 20.10 to 21.04 by specifying -d flag in

update-manager -cd


sudo do-release-upgrade -d

After upgrade you can install all new packages with

sudo apt-get update
sudo apt-get dist-upgrade

Hi Norbert,

Thank you for the welcome and see the output of the two commands below:

$ cat /etc/os-release:
VERSION="20.10 (Groovy Gorilla)"
PRETTY_NAME="Ubuntu 20.10"
$ grep ^deb -r /etc/apt --include=*.list
/etc/apt/sources.list.d/yann1ck-ubuntu-onedrive-groovy.list:deb httpppa.launchpad net/yann1ck/onedrive/ubuntu/ groovy main
/etc/apt/sources.list:deb httpnl.archive.ubuntu com /ubuntu/ groovy main restricted
/etc/apt/sources.list:deb httpnl.archive.ubuntu com/ubuntu/ groovy-updates main restricted
/etc/apt/sources.list:deb httpnl.archive.ubuntu com/ubuntu/ groovy universe
/etc/apt/sources.list:deb httpnl.archive.ubuntu com/ubuntu/ groovy-updates universe
/etc/apt/sources.list:deb httpnl.archive.ubuntu com/ubuntu/ groovy multiverse
/etc/apt/sources.list:deb httpnl.archive.ubuntu com/ubuntu/ groovy-updates multiverse
/etc/apt/sources.list:deb httpnl.archive.ubuntu com/ubuntu/ groovy-backports main restricted universe multiverse
/etc/apt/sources.list:deb httpsecurity.ubuntu com/ubuntu groovy-security main restricted
/etc/apt/sources.list:deb httpsecurity.ubuntu com/ubuntu groovy-security universe
/etc/apt/sources.list:deb httpsecurity.ubuntu com/ubuntu groovy-security multiverse

Using the update-manager -cd seems to trigger the OS upgrade, did not try that, because in the FAQ the d option should not be used anymore after the 22nd of april.

(Changed URLs because I can only post two links as a new user)

Thanks, upgrading now!


Can't upgrade to 21.04. Done sudo do-release-upgrade -d (and all the other updates

Please select other and more official mirror using software-properties-gtk and then retry.

Why You Can’t Upgrade to Ubuntu 21.04 (For Now)

Thank you Norbert. I did actually switch to Main Uk Server yesterday, and you were right, everything working...but why?

Seems like server-side issue. Maybe mirror was syncing or temporarily disabled. Thus was sending 403 status to users.

Thank you very much for your help Norbert, All working fine now and I'll maybe just stick to Main Uk Server next upgrade



I upgraded my Ubuntu MATE from version 20.10 to 21.04. During the upgrade, I got a message saying that the "postfix" package could not be installed, and then another:

After that, the last two steps of the update: cleaning and reboot did not happen. Recovery doesn't seem to have started either. However, "Welcome" shows that the current version of my Ubuntu MATE is 21.04. How can I check if the update has run correctly? Thanks.

Welcome to the Ubuntu MATE community, Pstrokaty!

In such case I would recommend to run the following set of commands:

sudo apt-get update # update package lists (you shouldn't have 'groovy' here)

sudo dpkg --configure -a # resume interrupted configuration tasks
sudo apt-get install -f # resume installation of broken packages

sudo apt-get upgrade # run package upgrade
sudo apt-get dist-upgrade # run package upgrade again with new dependencies
1 Like

I ran "sudo update-manager -cd" without the quotes & it prompted me to upgrade to 21.04 & said something about testing I assume this is a dev build but I'm not sure, I made a system image the other day using clonezilla after my last major change to the configuration so if it goes belly up no biggie I'll restore, one doesn't simply update the OS on their NAS & VPC server without a system image anyway dev version or not haha.

1 question though can anyone tell me if you can upgrade from a dev to final build?

If I could do with upgrading to 21.04 and the live disc works fine, is it safe to go ahead yet?

That's a line from a film, is it not?

"Is it safe?!"

P.S. 21.04 looks so beautiful it really needs to be on my computer!