Upgrade 15.10 to 16.04 - unable to download repository

[Jim Breen]

Like some others I have run into this problem when attempting to upgrade.

ls -ld /etc/apt/sources.list.d/* gives:
-rw-r--r-- 1 root root 118 Sep 10 12:04 /etc/apt/sources.list.d/aheck-ubuntu-ppa-wily.list
-rw-r--r-- 1 root root 118 Sep 10 12:04 /etc/apt/sources.list.d/aheck-ubuntu-ppa-wily.list.save
-rw-r--r-- 1 root root 73 Sep 10 12:04 /etc/apt/sources.list.d/spideroakone.list
-rw-r--r-- 1 root root 73 Sep 10 12:04 /etc/apt/sources.list.d/spideroakone.list.save

sudo apt update (at the end) gives:

....
Hit http://security.ubuntu.com wily-security/multiverse Sources
Err http://ppa.launchpad.net wily/main amd64 Packages
404 Not Found
Hit http://security.ubuntu.com wily-security/main amd64 Packages
Err http://ppa.launchpad.net wily/main i386 Packages
404 Not Found
Hit http://security.ubuntu.com wily-security/restricted amd64 Packages
Ign http://ppa.launchpad.net wily/main Translation-en_AU
Hit http://security.ubuntu.com wily-security/universe amd64 Packages
Hit http://security.ubuntu.com wily-security/multiverse amd64 Packages
Ign http://ppa.launchpad.net wily/main Translation-en
Hit http://security.ubuntu.com wily-security/main i386 Packages
Hit http://security.ubuntu.com wily-security/restricted i386 Packages
Hit http://security.ubuntu.com wily-security/universe i386 Packages
Hit http://security.ubuntu.com wily-security/multiverse i386 Packages
Hit http://security.ubuntu.com wily-security/main Translation-en
Hit http://security.ubuntu.com wily-security/multiverse Translation-en
Hit http://security.ubuntu.com wily-security/restricted Translation-en
Hit http://security.ubuntu.com wily-security/universe Translation-en
Fetched 2,539 B in 12s (205 B/s)
W: GPG error: http://APT.spideroak.com release InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 573E3D1C51AE1B3D
W: Failed to fetch http://ppa.launchpad.net/aheck/ppa/ubuntu/dists/wily/main/binary-amd64/Packages 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/aheck/ppa/ubuntu/dists/wily/main/binary-i386/Packages 404 Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

Not that fussed about the SpiderOak client - I can remove it and start afresh, but the launchpad
stuff might be more serious.

[uRock]

You may have to go into Software Sources and disable the mentioned PPA.

[Jim Breen]

Many thanks. That seems to have done the trick. Now for a deep breath and The Upgrade....

[uRock]

Awesome! Hopefully the upgrade went well!

[Bucky Ball]

You can upgrade from the unsupported 15.10 to the supported 16.04? That's an innovation. Thought you might need to look here (https://help.ubuntu.com/community/EOLUpgrades).

Here's a release schedule (http://www.ubuntu.com/info/release-end-of-life) for your future reference.

Before upgrading you should switch off (disable) any PPAs you have installed manually and any video drivers, too, if you can get the machine to run on the open-source one. This will give you the easiest ride. You may find yourself picking through a haystack with a heap of leftover PPAs and drivers in an attempt to locate what is screwing up your upgrade otherwise (like now).

As 'vanilla' as you can get it before an upgrade is rule-of-thumb. Less problematic.