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How to upgrade the Ubuntu server from 18.04 to 20.04?

How to upgrade the Ubuntu server from 18.04 to 20.04?



This step-by-step data reveals one of the best ways to enhance Ubuntu 18.04 LTS server to 20.04 LTS over an SSH connection or in some other case.

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

On this tutorial, I’ll current you the steps to enhance Ubuntu server mannequin 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?

Sooner than you go on upgrading your server, it’s best to protect just some consider ideas.

The server enhance course of may take half an hour or additional and this may occasionally result in downtime. If you happen to’re working an web service like WordPress or one other public coping with service, be prepared in your firms to be offline for some time.

That’s the reason it’s best to solely enhance to the model new mannequin when it is really essential.

Second issue is to make a backup of your server. I make the most of Linode cloud platform for my servers and making a backup of all of the server image is simply a matter of some clicks.

With that in ideas, let’s see one of the best ways to enhance to Ubuntu 20.04 server.

I am using root for working the directions. If you happen to’re not logged in as root.

Step 1: Exchange your system

Log in to your Ubuntu server. If you happen to occur to it’s a distant system, use SSH to log in. I suggest you already know one of the best ways to entry your server, correct?

Exchange your Ubuntu server first for any pending software program program exchange:

apt exchange && apt dist-upgrade -y

Step 2: Configure Exchange Supervisor

Ubuntu provides an necessary software program often called Exchange Supervisor for upgrading your system to a extra moderen mannequin.

Often, it should already be put in nevertheless do affirm that your Ubuntu server has exchange supervisor software program put in:

apt arrange update-manager-core

Subsequent, it’s best to look at the content material materials of the /and plenty of others/update-manager/release-upgrades file and make it attainable for the ultimate line is Fast=lts and it is commented out.

Which signifies that your Ubuntu system will seemingly be updated to a model new regular LTS mannequin. It seems one factor like this:

How to upgrade the Ubuntu server from 18.04 to 20.04?

Step 3: Enhance Ubuntu server to a model new LTS mannequin

After getting made sure of that, it’s possible you’ll enhance your Ubuntu 18.04 server to Ubuntu 20.04 LTS with this command:


Chances are you’ll even see a message like this that claims it cannot uncover a brand new mannequin to enhance to.

Checking for a model new Ubuntu launch
There isn’t a such factor as a enchancment mannequin of an LTS accessible.
To enhance to the most recent non-LTS develoment launch
set Fast=common in /and plenty of others/update-manager/release-upgrades.

If you happen to occur to do, it’s possible you’ll energy the enhance with -d alternative like this:

do-release-upgrade -d

The -d alternative forces to seek for enchancment launch which is 20.04 at present.

The rest of the method is principally pressing enter to what it requires.

Upgrading Ubuntu server over SSH connection? Pay attention!

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

This session appears to be working beneath ssh. It is not likely helpful
to hold out a enhance over ssh for the time being because of in case of failure it
is extra sturdy to get effectively.

See, the mannequin enhance course of needs your enter at a variety of steps. If you happen to’re doing it over SSH and your connection will get disconnect, what happens to the enhance? Will it cling? How will it get hold of the essential particular person enter to proceed with the enhance?

Don’t worry. Ubuntu is intelligent. The do-release-upgrade software program takes care of this. It routinely opens a model new ssh session at port 1022 with show display. In case you have got personalized firewall, it is important to open the port 1022.

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

If you happen to occur to get disconnected from the server in the midst of the enhance, it’s possible you’ll reconnect and get effectively the session by connecting to your server by ssh nevertheless at port 1022 like this:

ssh [email protected]_ip_address -p 1022

If you happen to occur to don’t see the enhance course of working, use the show display command like this:

show display -x

Observe the on show display instructions and also you should be upgraded to the model new server in spherical 20-30 minutes (and even a lot much less).

I noticed that it took considerable time on the step the place it upgrades LXD. I almost thought that my SSH connection hanged.

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

And within the occasion you screens identical to the one above the place you might have to decide on, press tab to change between the options and enter to confirm your enter.

After the enhance completes, it is a should to restart your Ubuntu server. You can affirm that you just’re using Ubuntu 20.04 with lsb_release -a command:

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

I hope you favored this quick little tutorial helpful in upgrading to Ubuntu 20.04 LTS server.

Have questions? Please be blissful to ask.


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