To install the Microsoft Core Fonts package in Ubuntu, run the following in your terminal:

sudo apt-get install msttcorefonts

And then this should go away and get them. Lovely.

NB, if this doesn’t take immediate effect, you can rebuild the font cache by running

sudo fc-cache -fv

Now, the Tahoma font is excluded these days from this package, so you’ll need to install that one manually, by following the instructions found here