Comments on: How to Upgrade Ubuntu 18.04 LTS to Ubuntu 20.04 LTS

By: david

david — Fri, 02 Jul 2021 01:10:41 +0000

I updated successfully but got a message saying the Apache2 failed to start, then when I check NGINX, and it was active. I assume the default server is NGINX after upgrading instead of Apache2, should I stop NGINX and use Apache2, or leave NGINX as of now? If I leave NGINX, should I ignore the message about failed Apache2? Thank you so much!

By: Sundroid

Sundroid — Sun, 16 May 2021 06:15:24 +0000

Hi all, Is there anyway to upgrade Ubuntu from 18 to 20 without user interaction. Completely from a shell script. I am trying to avoid user interaction at this command
sudo do-release-upgrade -d

By: Pradeep Kumar

Pradeep Kumar — Wed, 03 Feb 2021 03:26:05 +0000

In reply to Chris Wilkinson. To resolve this issue, upgrade your ssh server and ssh-client (putty)

By: Chris Wilkinson

Chris Wilkinson — Tue, 19 Jan 2021 12:12:11 +0000

The upgrade went surprisingly well and the server seems to be working correctly but when I try to SSH (Putty) into the server I get:

Couldn’t agree a key exchange algorithm (available: curve25519-sha256, curve25519-libssh.org.ecdh-sha3-nistp256,ecdh-sha2-nistp384, endh-sha2-nistp521, diffie-hellman-group16-sha512,diffie-hellman-group18,diffie-hellman-group14-sha256)

Any ideas please?

By: Yogender Singh Dabas

Yogender Singh Dabas — Wed, 13 Jan 2021 05:39:27 +0000

Hi Pradeep!!
Thanks for providing this excellent, to the point, with screenshots and commands, a very helpful artical . . .

I updated UBUNTU 18.04 LTS to 20.04 LTS without any problem . . .over WiFi 2Mbps first I updated 18.04 LTS it took around half an hour.
after restart, I used SOFTWARE AND UPDATES here no upgrade appeared so I used >> then type “ALT+F2“, enter the command as “update-manager -c -d” and hit enter. . .

now it’s great to use 20.04 LTS all programmes BLENDER, MESHEYE, GIMP, MUSIC, WiFi are performing well and running excellent . .

Thanks!!

By: Swaminathan

Swaminathan — Sat, 02 Jan 2021 11:55:46 +0000

Worked perfectly

By: riries

riries — Mon, 14 Dec 2020 08:32:25 +0000

An unresolvable problem occurred while calculating the upgrade.

This was likely caused by:
* Unofficial software packages not provided by Ubuntu
Please use the tool ‘ppa-purge’ from the ppa-purge
package to remove software from a Launchpad PPA and
try the upgrade again.

If none of this applies, then please report this bug using the
command ‘ubuntu-bug ubuntu-release-upgrader-core’ in a terminal. If
you want to investigate this yourself the log files in
‘/var/log/dist-upgrade’ will contain details about the upgrade.
Specifically, look at ‘main.log’ and ‘apt.log’.

By: xavier

xavier — Thu, 19 Nov 2020 17:07:17 +0000

In reply to Jonecir Souza. Did you find a fix for the same?

By: xavier

xavier — Thu, 19 Nov 2020 17:06:13 +0000

In reply to Pradeep Kumar.

i am also getting the same error , even though upgraded all updated using sudo apt-get update && apt-get upgrade still i am facing error
Checking for a new Ubuntu release
Please install all available updates for your release before upgrading.

By: Daniel

Daniel — Sun, 15 Nov 2020 07:30:39 +0000

It works thanks you