Every now and than we get requests from users who mention that they have installed True Type Font on Linux but Maya's Create text feature is not picking them up.
The main reason this occurs is because Maya only uses the Type 1 .PFA fonts. These are postscript fonts. So to get TTF format to work you will need to get them converted. There are a couple of tools to get this done.
The first option is simple but involves uploading your current TTF to a online server which converts them and makes it available for download.
While this is easy to use I would use caution if the fonts you are converting were purchased.
The second option is to download a simple little application from http://ttf2pt1.sourceforge.net/ which will allow to locally convert your TTF to PFA on your Linux box.
I have used this application plenty of times without many issues getting fonts converted. I generally run a simple command like.
ttf2pt1 -e location_off.tff
This will convert the TTF and save the PFA into the same directory. After that you simply need to copy the file into one of the following directories.
Hope this helps!