\documentclass{article}
\usepackage[semibold]{libertine-type1}
\usepackage{lipsum}
\begin{document}

\section*{Regular}
\lipsum[1]

\section*{Italic}
\textit{\lipsum[2]}

\section*{Bold}
\textbf{\lipsum[3]}

\section*{Bold Italic}
\textbf{\textit{\lipsum[4]}}

\section*{Small Caps Regular}
\textsc{\lipsum[5]}

\section*{Small Caps Italic}
\textsc{\textit{\lipsum[6]}}

\section*{Small Caps Bold}
\textsc{\textbf{\lipsum[7]}}

\section*{Small Caps Bold Italic}
\textsc{\textbf{\textit{\lipsum[8]}}}


\end{document}