xetex fontspec error ubuntu

Question

I'm using a custom style (not made by me) for a report and when I compile it using PdfLatex it works fine. However, when I want to use the house style fonts I have to compile it with XeLatex and I get an error:

! fontspec error: "font-not-found"
!
! The font "BookmanOldStyle" cannot be found.

(I get this error for multiple font styles but I won't include them here for brevity)

I've looked at similar questions but none of the answers have been able to help me or steer me in the right direction.

A MWE:

\documentclass[print]{tudelft-report}

\begin{document}

\chapter{Font test}
House style

\end{document}

! Note that you need this custom style! (see line 61)

Answer 1

This is because different fonts are used when compiling using PDFLaTeX or XeLaTeX. Quoting from the style definition file:

\ifxetex
    %% If the document is compiled with XeLaTeX, we load the TU Delft house
    %% style fonts: Bookman Old Style (serif) for titles and Tahoma (sans-serif)
    %% for text. Even if the nativefonts option was specified, we need these
    %% fonts for the cover.
    \newfontfamily\tudrmfamily[
        Path = fonts/,
        Extension = .ttf,
        BoldFont = *-Bold,
        ItalicFont = *-Italic,
        BoldItalicFont = *-BoldItalic
    ]{BookmanOldStyle}
    \newfontfamily\tudsffamily[
        Path = fonts/,
        Extension = .ttf,
        BoldFont = *-Bold,
        ItalicFont = *,
        ItalicFeatures = FakeSlant,
        BoldItalicFont = *-Bold,
        BoldItalicFeatures = FakeSlant
    ]{Tahoma} \else
    %% If the document is not compiled with XeLaTeX, we need to use the native
    %% fonts.
    \@nativefontstrue
    \newcommand*\tudrmfamily{\rmfamily}
    \newcommand*\tudsffamily{\sffamily} \fi

The error you get suggests the specified font is not installed on your system. A casual Google search hints that you might be able to download it, e.g. from http://fontzone.net/font-details/bookman-old-style . Additionally, fonts are provided in the subfolder of the one you linked: https://github.com/praseodym/tudelft-report-latex