\documentclass{article}
\usepackage{fontspec}
\setmainfont{Inconsolata}

\begin{document}
normal \emph{italic}, \textbf{bold} and \textbf{\emph{bold italic}}.
\end{document}

% 0 fago % fc-list|grep Incon
% /usr/share/fonts/inconsolata/Inconsolata.otf: Inconsolata:style=Medium
% /usr/share/texmf-dist/fonts/opentype/public/inconsolata/Inconsolata.otf: Inconsolata:style=Medium
% /usr/share/texmf-dist/fonts/type1/public/inconsolata/Inconsolata.pfb: Inconsolata:style=Regular