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I'm trying to update an Ubuntu Server 16.04.1 LTS to 18.04.1 LTS.

I've updated/upgraded everything before starting the migration progress with:

sudo do-release-upgrade -d

which I've already run successfully on other servers.

BTW, it's blocking somewhere in the middle, stating that:

Failed to fetch
http://security.ubuntu.com/ubuntu/pool/universe/w/webkit2gtk/libwebkit2gtk-4.0-37-gtk2_2.20.2-0ubuntu0.18.04.1_amd64.deb
Connessione non riuscita [IP: 91.189.91.23 80]

("Connessione non riuscita" means "Can't connect to")

The port is open, the IP is reachable, the telnet on port 80 is ok:

telnet 91.189.91.23 80
Trying 91.189.91.23...
Connected to 91.189.91.23.
Escape character is '^]'.

What could be the culprit?

Should I disable other PPAs as described in this answer?

Zanna
  • 72,312
Andrea Ligios
  • 113

2 Answers2

1

After the nth retry, I've run 

sudo apt-get dist-upgrade

and it completed the migration to 18.04 :|

I still don't know what happened.

Andrea Ligios
  • 113
1

Disable all PPA and Make sure that sourcelist /etc/apt/source.list contains only official repositories.

In Some cases if you are using firewall which block specific words in domain can block particular package from downloading ,you will stuck with that. Make sure that you allow traffic from that domain or you can whitelist particular URL.

KK Patel
  • 19,753