3

Try to upgrade ubuntu to 20.04 from 18.04, but software updater doesn't show the upgrade option. So I tried to do that in command line.

after do the following commands:

sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
sudo do-release-upgrade -d -f DistUpgradeViewGtk3

get outcome

sudo do-release-upgrade -d -f DistUpgradeViewGtk3
Checking for a new Ubuntu release
Failed to connect to https://changelogs.ubuntu.com/meta-release-development. Check your Internet connection or proxy settings
Upgrades to the development release are only 
available from the latest supported release.

any ideas for that? Thanks

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5
  • 1
    The -d option means you want the development release. But 20.04 has already been released. So, you shouldn't need it. Can you try removing that option?
    – Ray
    Nov 2, 2020 at 5:50
  • 1
    Hey Ray, I tried your method, just got the output sudo do-release-upgrade -f DistUpgradeViewGtk3 Checking for a new Ubuntu release Failed to connect to https://changelogs.ubuntu.com/meta-release. Check your Internet connection or proxy settings No new release found. can't let it work...
    – Tony
    Nov 2, 2020 at 21:01
  • Good to hear you solved your problem! If you're interested, you might as well copy your solution into an answer and indicate it is the "answer" so that it "closes" the question.
    – Ray
    Nov 3, 2020 at 3:18
  • @Ray Thanks buddy, but I got another problem that the network-manager is not running, did search online for a while, still not got it :(
    – Tony
    Nov 3, 2020 at 4:54
  • I'm not sure if this helps, but since Ubuntu 18.04 (I think), Ubuntu has switched to netplan. You can still use Network Manager with it, but for servers I look after, I gave up with Network Manager and made it use netplan instead. Perhaps you can take a look to see if that will help? See this or search for "Ubuntu netplan" and anything will probably be more helpful than me. Good luck!
    – Ray
    Nov 3, 2020 at 10:11

2 Answers 2

Reset to default
15

Just solve it, it seems like my openssl got problems. So I follow https://github.com/openssl/openssl/issues/5845 to let the Software Updater work again.

actually, after fixed the SSL, it still shows

Failed to connect to https://changelogs.ubuntu.com/meta-release. Check your Internet connection or proxy settings
No new release found.

then I found https://ubuntu-mate.community/t/cant-update-upgrade-anymore-um-18-04-v2-lts/19745/3
which edited /etc/update-manager/meta-release

https://changelogs.ubuntu.com/meta-release  
https://changelogs.ubuntu.com/meta-release-lts

TO

http://changelogs.ubuntu.com/meta-release  
http://changelogs.ubuntu.com/meta-release-lts

then works well!

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1
  • it doesn't work for me!
    – Azade
    Apr 24, 2023 at 18:53
0

First, enable debug logs:

$ DEBUG_UPDATE_MANAGER=1 do-release-upgrade
...
result of meta-release download: '<urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1131)>'
...

So in my case, the connection failed due to the certification of the proxy. Then change /usr/bin/do-release-upgrade to ignore this check.

Insert this code at the beginning of /usr/bin/do-release-upgrade file but after the 'future' line:

from __future__ import print_function

import ssl

try:
    _create_unverified_https_context = ssl._create_unverified_context
except AttributeError:
    pass
else:
    ssl._create_default_https_context = _create_unverified_https_context

ok, now it works!

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