I previously had installed QGIS 2.8 with the GRASS plugin on Ubuntu 14.04. Through a chain of events I ended up having to do a clean install of Ubuntu 15.04, and am attempting to re-install QGIS 2.8.
I have followed the instructions on the QGIS install page: my /etc/apt/sources.list is updated with the following lines:
deb (insert http header)qgis.org/ubuntugis vivid main deb-src (insert http header)qgis.org/ubuntugis vivid main deb (insert http header)ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu vivid main
My software ppa (displayed in the 'Other Software' tab of my "software and Updates" settings box) is set to "(insert http header)" "ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu"
The signing key in my settings 'Authentication' tab reads "DD45F6C3 2014-08-19 QGIS Archive Automatic Signing Key (2014) "
When I do an apt-get update followed by an apt-get install, however, it only downloads the old qgis 2.4 files. There's nothing I can find in my sources.list that calls for 2.4. How can I bypass the old software and make sure it downloads the new?