I had the same problem and
this post helped.
From the source linked above:
Quote:
Normal Ubuntu releases are supported for 9 months, whereas LTS (Long Term Support) releases are supported for 5 years. Once support is up for the version of Ubuntu you are using the repository is moved to another server and will no longer be available on the standard
http://archive.ubuntu.com/ubuntu/dist/ location.
The suggested remedy in the source linked above is to replace the relevant entries in the configuration file
/etc/apt/sources.list by running the following command at a terminal prompt (essentially a simple "search & replace" on steroids):
Code:
sudo sed -i -e 's/archive.ubuntu.com\|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list
*Note*: This worked with the repository server set to "Main server" but not if the server was set to the (in my case German) country server.
After running the above
sed command you can run
Code:
sudo apt-get update
to update all sources.
