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author | Jovina | 2012-08-08 12:36:14 +0530 |
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committer | Jovina | 2012-08-08 12:36:14 +0530 |
commit | 267a675b5f3b6edc08eb23af58fe8628836dd3f9 (patch) | |
tree | f380867d1953b95b62c947d46013288797b91534 | |
parent | 4e7075d23dfff0583c17afd1cceb9cc44164212c (diff) | |
download | sdes-stscripts-267a675b5f3b6edc08eb23af58fe8628836dd3f9.tar.gz sdes-stscripts-267a675b5f3b6edc08eb23af58fe8628836dd3f9.tar.bz2 sdes-stscripts-267a675b5f3b6edc08eb23af58fe8628836dd3f9.zip |
Removed ult_6.
-rw-r--r-- | ult/ult_6/marks1.txt | 5 | ||||
-rwxr-xr-x | ult/ult_6/results.sh | 3 | ||||
-rw-r--r-- | ult/ult_6/script.rst | 296 | ||||
-rw-r--r-- | ult/ult_6/students.txt | 5 | ||||
-rw-r--r-- | ult/ult_6/ult6.tex | 176 |
5 files changed, 0 insertions, 485 deletions
diff --git a/ult/ult_6/marks1.txt b/ult/ult_6/marks1.txt deleted file mode 100644 index 9a5299d..0000000 --- a/ult/ult_6/marks1.txt +++ /dev/null @@ -1,5 +0,0 @@ -5 89 92 85 -4 98 47 67 -1 67 82 76 -2 78 97 60 -3 67 68 69 diff --git a/ult/ult_6/results.sh b/ult/ult_6/results.sh deleted file mode 100755 index acdac84..0000000 --- a/ult/ult_6/results.sh +++ /dev/null @@ -1,3 +0,0 @@ -#!/bin/bash -mkdir ~/marks -cut -d " " -f 2- marks1.txt | paste -d " " students.txt - | sort > ~/marks/results.txt diff --git a/ult/ult_6/script.rst b/ult/ult_6/script.rst deleted file mode 100644 index 0413ada..0000000 --- a/ult/ult_6/script.rst +++ /dev/null @@ -1,296 +0,0 @@ -.. Objectives -.. ---------- - - .. At the end of this tutorial, you will be able to: - - .. 1. Prepare a simple shell script. - .. 2. Run a script successfully and print it's result. - .. 3. Understand what an environment variable is. - -.. Prerequisites -.. ------------- - -.. 1. Using Linux tools - Part 1 -.. 2. Using Linux tools - Part 2 -.. 3. Using Linux tools - Part 3 -.. 4. Using Linux tools - Part 4 -.. 5. Using Linux tools - Part 5 - - -Script ------- - -.. L1 - -{{{ Show the first slide containing title, name of the production -team along with the logo of MHRD }}} - -.. R1 - -Hello friends and Welcome to the tutorial on -'Using linux tools - Part 6'. - -.. L2 - -{{{ Show slide with objectives }}} - -.. R2 - -At the end of this tutorial, you will be able to, - - 1. Prepare a simple shell script. - #. Run a script successfully and print it's result. - #. Understand what an environment variable is. - -.. L3 - -{{{ Switch to the pre-requisite slide }}} - -.. R3 - -Before beginning this tutorial,we would suggest you to complete the -tutorial on "Using Linux tools from Part 1 to Part 5". - -Let us start with creating a simple shell script. -A shell script is simply a sequence of commands, that are put into a file, -instead of entering them one by one onto the shell. The script can then be -run, to run the sequence of commands in a single shot instead of manually -running, each of the individual commands. -For instance, let's say we wish to create a directory called ``marks`` in the -home folder and save the results of the students into a file -``results.txt``. - -.. R4 - -We open our editor and save the following text to ``results.sh`` - -.. L4 - -{{{ Open an editor and type the following }}} -:: - - #!/bin/bash - mkdir ~/marks - cut -d " " -f 2- marks1.txt | paste -d " " students.txt - | sort > ~/marks/results.txt - -.. R5 - -We can now run the script as, - -.. L5 - -{{{ Open the terminal }}} -:: - - ./results.sh - -.. R6 - -We get an error saying, Permission denied! Why? Can you think of the -reason? Yes, the file doesn't have execute permissions. -We make the file executable and then run it. - -.. L6 -:: - - chmod u+x results.sh - ./results.sh - -.. R7 - -We get back the prompt. We can check the contents of the file -``results.txt`` to see if the script has run. - -So, here, we have our first shell script. The first line of the script is used -to specify the interpreter or shell which should be used to execute the script. -In this case, we are asking it to use the bash shell. -Once, the script has run, we get back the prompt. Here, we had to manually check, -if the contents of the file are correct. It would be useful to have our script -print out messages. For this, we can use the ``echo`` command. We can edit our -``results.sh`` script, as follows. - -.. L7 - -{{{ Open an editor and type the following }}} -:: - - #!/bin/bash - mkdir ~/marks - cut -d " " -f 2- marks1.txt | paste -d " " students.txt - | sort > ~/marks/results.txt - echo "Results generated." - -.. R8 - -Now, on running the script, we get a message on the screen informing us, -when the script has run. - -Let's now say, that we wish to let the user decide the file to which the -results should be written to. The results file, should be specifiable by an -argument in the command line. We can do so, by editing the file, as below. - -.. L8 - -{{{ Make the necessary changes in the previous script }}} - -:: - - #!/bin/bash - mkdir ~/marks - cut -d " " -f 2- marks1.txt | paste -d " " students.txt - | sort > ~/marks/$1 - echo "Results generated." - - -{{{ Highlight the text ``$1`` }}} - -.. R9 - -The ``$1`` above, corresponds to the first command line argument to the -script. So, we can run the script as shown below, to save the results to -``grades.txt``. - -.. L9 -:: - - ./results.sh grades.txt - -.. R10 - -When we run the ``results.sh`` file, we are specifying the location of the -script by using ``./``. But for any of the other commands, -we didn't have to specify their locations. Why? The -shell has a set of locations where it searches, for the command that we are -trying to run. - -.. L10 - -.. L11 - -{{{ Show slide, PATH }}} - -.. R11 - -These set of locations are saved in an "environment" -variable called PATH.let us look at what the value of the PATH variable is. To view the -values of variables, we can use the echo command. - -.. L12 - -{{{ Switch to the terminal }}} -:: - - echo $PATH - -.. R12 - -So, these are all the paths that are searched, when looking to execute a -command. If we put the results.sh script in one of these locations, we -could simply run it, without using the ``./`` at the beginning. - -.. L13 - -{{{ Show slide, variables & comments }}} - -.. R13 - -As expected, it is possible to define our own variables inside our shell -scripts. For example, - -.. L14 - -{{{ Switch to the terminal }}} -:: - - name="FOSSEE" - -.. R14 - -It creates a new variable ``name`` whose value is ``FOSSEE``. To refer to this -variable, inside our shell script, we would refer to it, as ``$name``. -Note that, there is no space around the ``=`` sign. - -.. L15 -:: - - ls $name* - -.. R15 - -.. R16 - -It is possible to store the output of a command in a variable, by enclosing -the command in back-quotes. - -.. L16 -:: - - count=`wc -l wonderland.txt` - -.. R17 - -It saves the number of lines in the file ``wonderland.txt`` in the variable -count. - -The ``#`` character is used to comment out content from a shell script. -Anything that appears after the ``#`` character in a line, is ignored by -the bash shell. - -.. L18 - -.. L19 - -{{{ Switch to 'Summary' slide }}} - -.. R19 - -This brings us to the end of the end of this tutorial. -In this tutorial, we have learnt to, - - 1. Prepare a shell script. - #. Display the result of a script, using the ``echo`` command. - #. Use the environment variable ``PATH``. - #. Create variables and comment out content using the ``#`` sign. - -.. L20 - -{{{ Show self assessment questions slide }}} - -.. R20 - -Here are some self assessment questions for you to solve - - 1. Which sign is used to comment out content from a shell script. - - - $ - - % - - # - - * - - 2. How will you add directory ``/data/myscripts`` to the beginning of - the $PATH environment variable ? - -.. L21 - -{{{ Solution of self assessment questions on slide }}} - -.. R21 - -And the answers, - - 1. We use the ``#`` sign to comment out the content from a shell script. - - 2. In order to add a directory to the beginning of the $PATH variable,we - say, -:: - - $PATH=/data/myscripts:$PATH - -.. L22 - -{{{ Show the Thank you slide }}} - -.. R22 - -Hope you have enjoyed this tutorial and found it useful. -Thank you! - - diff --git a/ult/ult_6/students.txt b/ult/ult_6/students.txt deleted file mode 100644 index ddacd6b..0000000 --- a/ult/ult_6/students.txt +++ /dev/null @@ -1,5 +0,0 @@ -Hussain -Dilbert -Anne -Raul -Sven diff --git a/ult/ult_6/ult6.tex b/ult/ult_6/ult6.tex deleted file mode 100644 index 389a602..0000000 --- a/ult/ult_6/ult6.tex +++ /dev/null @@ -1,176 +0,0 @@ -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -% 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 VI} -\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 a simple shell script. -\item Run a script successfully and print it's result. -\item Understand what an environment variable is. -\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 -\end{itemize} -\end{frame} - -\begin{frame}[fragile] - \frametitle{\texttt{PATH}} - \begin{itemize} - \item The shell searches in a set of locations, for the command - \item Locations are saved in ``environment'' variable called PATH - \item \texttt{echo} can show the value of variables - \end{itemize} - \begin{lstlisting} - $ echo $PATH - \end{lstlisting} % $ - \begin{itemize} - \item Put \texttt{results.sh} in one of these locations - \item It can then be run without \texttt{./} - \end{itemize} -\end{frame} - -\begin{frame}[fragile] - \frametitle{Variables \& Comments} - \begin{lstlisting} - $ name=FOSSEE - $ count=`wc -l wonderland.txt` - $ echo $count # Shows the value of count - \end{lstlisting} % $ - \begin{itemize} - \item It is possible to create variables in shell scripts - \item Variables can be assigned with the output of commands - \item \alert{NOTE:} There is no space around the \texttt{=} sign - \item All text following the \texttt{\#} is considered a comment - \end{itemize} -\end{frame} - -\begin{frame} -\frametitle{Summary} -\label{sec-8} - - In this tutorial, we have learnt to, - - -\begin{itemize} -\item Prepare a shell script. -\item Display the result of a script, using the ``echo'' command. -\item Use the environment variable ``PATH''. -\item Create variables and comment out content using the ``\#'' sign. -\end{itemize} -\end{frame} - -\begin{frame}[fragile] -\frametitle{Evaluation} -\label{sec-9} - - -\begin{enumerate} -\item Which sign is used to comment out content from a shell script? -\begin{itemize} -\item \$ -\item \% -\item \# -\item * -\end{itemize} -\vspace{8pt} -\item How will you add directory ``/data/myscripts'' to the beginning of - the \$PATH environment variable ? -\end{enumerate} -\end{frame} -\begin{frame} -\frametitle{Solutions} -\label{sec-10} - - -\begin{enumerate} -\item `` \# '' -\vspace{15pt} -\item \$ PATH=/data/myscripts:\$PATH -\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} - - |