\frametitle{Pipes}
\begin{columns}
\begin{column}{0.48\columnwidth}
\begin{block}{Problem}
Count .txt files:
\begin{itemize}
\item \texttt{ls} shows files
\item \texttt{grep} filters
\item \texttt{wc -l} counts
\end{itemize}

How to connect?
\end{block}
\end{column}
\begin{column}{0.48\columnwidth}
\begin{exampleblock}{Solution}\label{sec:orgc7d8ba1}
Use pipes (\texttt{|})

\begin{verbatim}
ls -l | grep txt | wc -l
\end{verbatim}
\end{exampleblock}
\end{column}
\end{columns}
\begin{alertblock}<2->{Philosophy}
"Do one thing well" — combine simple tools for complex tasks
\end{alertblock}
