I am trying to install pgrouting on ubuntu 14.04 like this:
Add pgRouting launchpad repository
sudo apt-add-repository -y ppa:ubuntugis/ppa
sudo apt-add-repository -y ppa:georepublic/pgrouting
sudo apt-get update
Install pgRouting package (for Ubuntu 14.04)
sudo apt-get install postgresql-9.3-pgrouting
But "apt-get update" fails with:
W: Failed to fetch http://ppa.launchpad.net/ubuntugis/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/ubuntugis/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
How should I fix this?