How can I fix PPA Failed to fetch errors while running apt-get update on Ubuntu 14.04?

How can I fix the following errors I received during sudo apt-get update on Ubuntu 14.04 so I can upgrade to Ubuntu 16.04?

W: Failed to fetch 403 Forbidden
W: Failed to fetch 403 Forbidden

I have tried everything I can find on here relating to this issue & don't understand what I may be doing wrong. I am fairly new to Ubuntu / Linux systems so please bear with me & try to help me.

2 Answers

Try launch "Software & update" utility, and disable these PPA`s on tab "Other"

Wasted a lot of time on this today but figure it out.

If you're getting ppa.launchpad.net timeout issues and using docker, here is how to fix it:

1. Add this line: apt-get update --option Acquire::ForceIPv4=true --option Acquire::Retries=100 --option Acquire::http::Timeout=60
2. Replace: apt with apt-get everywhere.
3. On the host machine run this apt install dnsmasq