I want do_release_upgrade from 16.04 to 18.04 LTS but I receive update errors:
Error during update
A problem occurred during the update. This is usually some sort of
network problem, please check your network connection and retry.
W:The repository 'https://esm.ubuntu.com/infra/ubuntu
bionic-infra-security Release' does not have a Release file., W:Data
from such a repository can't be authenticated and is therefore
potentially dangerous to use., W:See apt-secure(8) manpage for
repository creation and user configuration details., W:The repository
'https://esm.ubuntu.com/infra/ubuntu bionic-infra-updates Release'
does not have a Release file., W:Data from such a repository can't be
authenticated and is therefore potentially dangerous to use., W:See
apt-secure(8) manpage for repository creation and user configuration
details., E:Failed to fetch
https://esm.ubuntu.com/infra/ubuntu/dists/bionic-infra-security/main/binary-amd64/Packages
, E:Failed to fetch
https://esm.ubuntu.com/infra/ubuntu/dists/bionic-infra-updates/main/binary-amd64/Packages
, E:Some index files failed to download. They have been ignored, or
old ones used instead.
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
=== Command terminated with exit status 1 (Mon May 3 12:47:38 2021) ===***
How can I fix this? Can I still do_release_upgrade after 30th april 2021?
greetz, Timo
esm.ubuntu.com
sources (they are invalid for bionic as it's still in standard support) and try again. – guiverc May 03 '21 at 10:54