I’m using some older Windows programs – abandonware stuff by this point – on Ubuntu Mate via Wine.  I needed to install some custom fonts for these programs to use and had a bit of a time finding straightforward instructions on doing so.  Turns out it’s easy.  The fonts I needed are TrueType, so that’s all I’ve tested with.

Navigate to home/YOURUSERHOME/.wine/drive_c/windows/fonts

You will have to enable hidden files in order to see the .wine directory, and if you haven’t done so already you’ll need to open the fonts directory as administrator (from the windows directory right click the fonts directory and choose Open as Administrator).  Dump your font(s) into that directory.  Then open a prompt and enter:

sudo fc-cache -fv

This will rebuild the font information caches for fontconfig system.  Then you should be good to go.

“Some index files failed to download.”  That’s the error I got upon running apt-get update, after having Ubuntu Mate notify me that some of my updates are, er, out of date.  The indexes that failed to download were related to Flux, which I really liked having on my Windows machines.  Turns out that, as of this writing, the repository of Vivid Vervet (Ubuntu 15) for Flux ain’t there.  Take a look for yourself and see.  I suppose I could install an older version, but since I wasn’t interested in getting into any compatibility issues I decided to bail on Flux for now.

But I couldn’t uninstall Flux.  It isn’t installed.  I need to get rid of the repository information.  You’d think that would be as simple as remove-apt-repository blah blah, since adding it is a simple add-apt-repository, but nope.  There’s no remove-apt-repository.  Ultimately I opened the path /etc/apt/sources.list.d as admin, and removed the associated list and save files.  Reran apt-get update and voila – both the errors and the nag referring to out of date updates disappeared.