The first time I installed LaTeX was in /usr/share/texmf-texlive (~600MB).
Yesterday I installed TeX Live from apt-get, I simply don't know where it has been installed (~1GB).
Today I installed Tex Live from tug.org (~4.5GB). It's in /usr/local/texlive/2013.
However both Kyle and TeXMaker are still using the first installation.
How can I choose which version to use?