This step-by-step information reveals the best way to improve Ubuntu 18.04 LTS server to 20.04 LTS over an SSH connection or in any other case.

Ubuntu 20.04 LTS is launched with new kernel and new options. If you’re working an Ubuntu server, you could be questioning about upgrading to Ubuntu 20.04 LTS server.

On this tutorial, I’ll present you the steps to improve Ubuntu server model from 18.04 to 20.04 LTS.

Upgrading to Ubuntu 20.04 LTS server from 18.04

How to upgrade the Ubuntu server from 18.04 to 20.04?

Earlier than you go on upgrading your server, it is best to preserve just a few factor in thoughts.

The server improve course of might take half an hour or extra and this may lead to downtime. If you’re working an internet service like WordPress or another public dealing with service, be ready on your companies to be offline for a while.

That is why it is best to solely improve to the brand new model when it’s actually crucial.

Second factor is to make a backup of your server. I take advantage of Linode cloud platform for my servers and making a backup of all the server picture is only a matter of some clicks.

With that in thoughts, let’s see the best way to improve to Ubuntu 20.04 server.

I’m utilizing root for working the instructions. If you’re not logged in as root.

Step 1: Replace your system

Log in to your Ubuntu server. If you happen to it’s a distant system, use SSH to log in. I imply you already know the best way to entry your server, proper?

Replace your Ubuntu server first for any pending software program replace:

apt replace && apt dist-upgrade -y

Step 2: Configure Replace Supervisor

Ubuntu supplies an important software known as Replace Supervisor for upgrading your system to a more moderen model.

Usually, it ought to already be put in however do confirm that your Ubuntu server has replace supervisor software put in:

apt set up update-manager-core

Subsequent, it is best to examine the content material of the /and many others/update-manager/release-upgrades file and make it possible for the final line is Immediate=lts and it’s commented out.

Which means that your Ubuntu system will likely be up to date to a brand new steady LTS model. It appears one thing like this:

How to upgrade the Ubuntu server from 18.04 to 20.04?

Step 3: Improve Ubuntu server to a brand new LTS model

After getting made certain of that, you may improve your Ubuntu 18.04 server to Ubuntu 20.04 LTS with this command:

do-release-upgrade

You may even see a message like this that claims it can not discover a new model to improve to.

Checking for a brand new Ubuntu launch
There is no such thing as a improvement model of an LTS accessible.
To improve to the newest non-LTS develoment launch
set Immediate=regular in /and many others/update-manager/release-upgrades.

If you happen to do, you may power the improve with -d choice like this:

do-release-upgrade -d

The -d choice forces to search for improvement launch which is 20.04 at current.

The remainder of the process is principally urgent enter to what it calls for.

Upgrading Ubuntu server over SSH connection? Listen!

If you’re utilizing SSH to log in to your system, it is best to see a warning message like this:

This session seems to be working beneath ssh. It’s not really useful
to carry out a improve over ssh at the moment as a result of in case of failure it
is more durable to get well.

See, the model improve process wants your enter at a number of steps. If you’re doing it over SSH and your connection will get disconnect, what occurs to the improve? Will it cling? How will it obtain the crucial person enter to proceed with the improve?

Don’t fear. Ubuntu is clever. The do-release-upgrade software takes care of this. It routinely opens a brand new ssh session at port 1022 with display screen. In case you have customized firewall, it’s essential to open the port 1022.

iptables -I INPUT -p tcp –dport 1022 -j ACCEPT

If you happen to get disconnected from the server in the course of the improve, you may reconnect and get well the session by connecting to your server by ssh however at port 1022 like this:

ssh [email protected]_ip_address -p 1022

If you happen to don’t see the improve process working, use the display screen command like this:

display screen -x

Observe the on display screen directions and you ought to be upgraded to the brand new server in round 20-30 minutes (and even much less).

I observed that it took appreciable time on the step the place it upgrades LXD. I nearly thought that my SSH connection hanged.

How to upgrade the Ubuntu server from 18.04 to 20.04?Takes a very long time at this display screen

And in the event you screens just like the one above the place you could have to choose, press tab to modify between the alternatives and enter to verify your enter.

After the improve completes, it’s a must to restart your Ubuntu server. You’ll be able to confirm that you’re utilizing Ubuntu 20.04 with lsb_release -a command:

lsb_release -a
No LSB modules can be found.
Distributor ID: Ubuntu
Description: Ubuntu 20.04 LTS
Launch: 20.04
Codename: focal

I hope you favored this fast little tutorial useful in upgrading to Ubuntu 20.04 LTS server.

Have questions? Please be happy to ask.

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