Ubuntu – Failed to connect to https://changelogs.ubuntu.com/meta-release-development. Check your Internet connection or proxy settings

do-release-upgradeinternetnetworkingPROXYupgrade

When I want to upgrade Ubuntu from 18.04 Bionic Beaver to 18.10 to Cosmic Cuttlefish via terminal with sudo do-release-upgrade -d command it gives me warning:

Failed to connect to https://changelogs.ubuntu.com/meta-release-development. 
Check your Internet connection or proxy settings.

However I have internet connection, I write this question now from my Ubuntu computer.

How can I resolve this?

Best Answer

  • It seems like there is an issue about certificates:

    result of meta-release download: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:841)>
    

    As a workaround, I edited the file /usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py and added these lines to the beginning:

    import ssl
    ssl._create_default_https_context = ssl._create_unverified_context
    
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