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diff --git a/ult/ult_7/ult7.tex b/ult/ult_7/ult7.tex new file mode 100644 index 0000000..a306272 --- /dev/null +++ b/ult/ult_7/ult7.tex @@ -0,0 +1,202 @@ +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% Using Linux Tools +% +% Author: FOSSEE +% Copyright (c) 2009, FOSSEE, IIT Bombay +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +\documentclass[12pt,compress]{beamer} + +\mode<presentation> +{ + \usetheme{Warsaw} + \useoutertheme{infolines} + \setbeamercovered{transparent} +} + +\usepackage[english]{babel} +\usepackage[latin1]{inputenc} +%\usepackage{times} +\usepackage[T1]{fontenc} + +% Taken from Fernando's slides. +\usepackage{ae,aecompl} +\usepackage{mathpazo,courier,euler} +\usepackage[scaled=.95]{helvet} + +\definecolor{darkgreen}{rgb}{0,0.5,0} + +\usepackage{listings} +\lstset{language=sh, + basicstyle=\ttfamily\bfseries, + commentstyle=\color{red}\itshape, + stringstyle=\color{darkgreen}, + showstringspaces=false, + keywordstyle=\color{blue}\bfseries} + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +% DOCUMENT STARTS +\begin{document} + +\begin{frame} + +\begin{center} +\vspace{12pt} +\textcolor{blue}{\huge Using Linux Tools\\Part VII} +\end{center} +\vspace{18pt} +\begin{center} +\vspace{10pt} +\includegraphics[scale=0.95]{../images/fossee-logo.png}\\ +\vspace{5pt} +\scriptsize Developed by FOSSEE Team, IIT-Bombay. \\ +\scriptsize Funded by National Mission on Education through ICT\\ +\scriptsize MHRD,Govt. of India\\ +\includegraphics[scale=0.30]{../images/iitb-logo.png}\\ +\end{center} +\end{frame} +\begin{frame} +\frametitle{Objectives} +\label{sec-2} + +At the end of this tutorial, you will be able to, +\begin{itemize} +\item Prepare scripts using 'Control Operators'. +\item Understand what 'Environment Variables' are. +\end{itemize} +\end{frame} + +\begin{frame} +\frametitle{Pre-requisite} +\label{sec-3} + +Spoken tutorial on - +\begin{itemize} +\item Using Linux tools -- Part I +\item Using Linux tools -- Part II +\item Using Linux tools -- Part III +\item Using Linux tools -- Part IV +\item Using Linux tools -- Part V +\item Using Linux tools -- Part VI +\end{itemize} +\end{frame} + +\begin{frame}[fragile] + \frametitle{\texttt{if}} + \begin{itemize} + \item Print message if directory exists in \texttt{pwd} + \end{itemize} + \begin{lstlisting} + #!/bin/bash + if test -d $1 + then + echo "Yes, the directory" \ + $1 "is present" + fi + \end{lstlisting} % $ +\end{frame} + +\begin{frame}[fragile] + \frametitle{\texttt{[ ]} - alias for \texttt{test}} + \begin{itemize} + \item Square brackets (\texttt{[]}) can be used instead of + \texttt{test} + \item + \end{itemize} + \begin{lstlisting} + #!/bin/bash + if [ $1 -lt 0 ] + then + echo "number is negative" + else + echo "number is non-negative" + fi + \end{lstlisting} % $ + \begin{itemize} + \item \alert{spacing is important, when using the square brackets} + \end{itemize} +\end{frame} + +\begin{frame}[fragile] + \frametitle{\texttt{for}} + \begin{block}{Problem} + Given a set of \texttt{.mp3} files, that have names beginning with + numbers followed by their names --- \texttt{08 - Society.mp3} --- + rename the files to have just the names. Also replace any spaces + in the name with hyphens. + \end{block} + \begin{itemize} + \item Loop over the list of files + \item Process the names, to get new names + \item Rename the files + \end{itemize} +\end{frame} + +\begin{frame}[fragile] + \frametitle{Environment Variables} + \begin{itemize} + \item Pass information from shell to programs running in it + \item Behavior of programs can change based on values of variables + \item Environment variables vs. Shell variables + \item Shell variables -- only current instance of the shell + \item Environment variables -- valid for the whole session + \item Convention -- environment variables are UPPER CASE + \end{itemize} +\end{frame} + +\begin{frame} +\frametitle{Summary} +\label{sec-8} + + In this tutorial, we have learnt to, + + +\begin{itemize} +\item Prepare scripts using control structures like ``if'', ``if-else'', + ``for'' and ``while''. +\item Use 'environment variables'. +\item Export a variable to the environment of all the processes, using + the ``export'' command. +\end{itemize} +\end{frame} +\begin{frame}[fragile] +\frametitle{Evaluation} +\label{sec-9} + + +\begin{enumerate} +\item Print the text ``dog man'' in such a way that the prompt + continues after the text. +\vspace{8pt} +\item How can you add a new path variable ``/data/myscripts'' to \$PATH variable ? +\end{enumerate} +\end{frame} +\begin{frame} +\frametitle{Solutions} +\label{sec-10} + + +\begin{enumerate} +\item \$ echo -n dog man +\vspace{15pt} +\item \$ export PATH=\$PATH://data/myscripts +\end{enumerate} +\end{frame} +\begin{frame} + + \begin{block}{} + \begin{center} + \textcolor{blue}{\Large THANK YOU!} + \end{center} + \end{block} +\begin{block}{} + \begin{center} + For more Information, visit our website\\ + \url{http://fossee.in/} + \end{center} + \end{block} +\end{frame} + +\end{document} + + |