Detailed Instruction on how to make virtual packages

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http://askubuntu.com – The problem is that I have vanilla TeXlive installed from the internet. However when I want to install a program like LyX, it says this: The following NEW packages will be installed: dvipng latex-beamer latex-xcolor lmodern lyx lyx-common pgf preview-latex-style prosper ps2eps tex-common texlive-base texlive-binaries texlive-common texlive-doc-base texlive-extra-utils texlive-font-utils texlive-fonts-recommended texlive-fonts-recommended-doc texlive-generic-extra texlive-generic-recommended texlive-latex-base texlive-latex-base-doc texlive-latex-extra texlive-latex-extra-doc tex (HowTos)