+\begin{frame}[fragile]
+ \begin{lstlisting}
+Host nas
+ HostName 192.168.0.102
+ Identityfile ~/.ssh/nas
+
+Host github.com
+ HostName github.com
+ Identityfile ~/.ssh/github
+
+Host werk
+ User johndoe
+ HostName ssh.tunnel.werk.com
+ ForwardX11 yes
+ Port 2222
+ Identityfile ~/.ssh/werk
+
+Host muziekserver
+ User gebruiker
+ HostName muziek.dyndns.com
+ IdentityFile ~/.ssh/mpi
+ LocalForward 8123 localhost:8123
+ AddressFamily inet
+ \end{lstlisting}
+\end{frame}