Ubuntu 14 to 16.04 upgrade fail
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Ubuntu 14 to 16.04 upgrade fail

hi. I got this error when upgrading to ubuntu 16.04

Err http://ppa.launchpad.net xenial/main amd64 Packages
404 Not Found
Err http://ppa.launchpad.net xenial/main i386 Packages
404 Not Found
Ign http://ppa.launchpad.net xenial/main Translation-en
Hit http://download.webmin.com sarge Release.gpg
Hit http://download.webmin.com sarge Release
Hit http://download.webmin.com sarge/contrib amd64 Packages
Hit http://download.webmin.com sarge/contrib i386 Packages
Err http://download.webmin.com sarge/contrib Translation-en

Err http://download.webmin.com sarge/contrib Translation-en

Err http://download.webmin.com sarge/contrib Translation-en

Err http://download.webmin.com sarge/contrib Translation-en

Ign http://download.webmin.com sarge/contrib Translation-en
Fetched 0 B in 0s (0 B/s)

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:Failed to fetch
http://ppa.launchpad.net/mc3man/trusty-media/ubuntu/dists/xenial/main/binary-amd64/Packages
404 Not Found
, W:Failed to fetch
http://ppa.launchpad.net/mc3man/trusty-media/ubuntu/dists/xenial/main/binary-i386/Packages
404 Not Found
, E:Some index files failed to download. They have been ignored, or
old ones used instead.

anyone know where to fix ?

Noobies in Linux

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