$sudo apt-get install msttcorefontsThis will give you the core fonts, but if there are other TrueType fonts that you want installed, it is as easy as copying the font files to the ~/.fonts/ directory.
After installing new fonts, you will have to log out and log in again to be able to see and use the new fonts. If you want to avoid this, you can regenerate the fonts cache by issuing the following command:"
$sudo fc-cache -fv
Thanks to Carthik's Ubuntu blog.