How to get Times New Roman font in LibreOffice on Linux?

If using Ubuntu then you can also install all restricted software (like fonts, Java, Flash, MP3 support etc) with one package, "restricted" in this case means: that is legal if end-user installs it itself, but not legal (so restricted) if installed automatically by distribution itself (so it can't be installed by default). End-user must accept license terms - by selected "Yes" - I agree with license.

1. Ubuntu Software Center | Edit | Software Sources | "Other software" tab | check both partner repositories.
2. From terminal (or Software Center itself):
   sudo apt-get update
sudo apt-get install ubuntu-restricted-extras
3. After install restart LibreOffice to get accepted this fonts.

If you don't want to install of the restricted software, then in Software Center type in "Microsoft" and one of the search result is going to be Microsoft fonts. Install that package.
One additional info. In Ubuntu there should already be Liberation fonts. There are very very similar to Microsoft fonts and this Liberation fonts are free of use (no restriction). Check them out, I think professor will most probably not notice the difference: https://en.wikipedia.org/wiki/Liberation_fonts

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