Since installing Ubuntu, I noticed that it has an old version of TeXLive, namely, TeXLive 2009. To get the latest version, I downloaded and installed TeXLive 2011 from CTAN. As this installs itself in a separate directory, I noticed that I now have two versions of TeXLive installed on my system.
My first question is, can I safely remove the old version using the Synaptic Package Manager, for example, without affecting the newer version, or do I need to uninstall both, and reinstall TeXLive 2011 by itself?
My second question is, does it really matter since I have done the proper thing, and set PATH to include the new version of TeXLive? Note that all works fine if I, for example, run pdflatex at the system prompt (that is, it uses the latest version).
My third question is, which version is KILE using? Is it using the first one it finds in the PATH, or is it still pointing to the old version?
Any help/advice would be appreciated.