5 WIP
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4.html
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@ -219,7 +219,7 @@ USER Benutzername</code></pre>
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</section>
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<section style="font-size: .6em">
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<section style="font-size: .7em">
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<pre><code>#!/bin/bash
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clear
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echo "Diese Infos werden von mysystem.sh bereitgestellt."
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126
5.html
126
5.html
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@ -40,7 +40,7 @@
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<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
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<h1>LINUX</h1>
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<h3>Das universelle Betriebssystem</h3>
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<p>Eine Einführung - Teil 4
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<p>Eine Einführung - Teil 5
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<p>
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<small>Deutsche Angestellten Akademie</small>
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</p>
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@ -51,25 +51,119 @@
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</section>
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<section>
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<h2>vim und emacs</h2>
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<h3>Die mächtigen Unix Editoren</h3>
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<h2>Bash scripting - Fortsetzung</h2>
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</section>
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<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
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<h3>vim</h3>
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<ul>
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<li class="fragment">ein Editor für die shell </li>
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<li class="fragment">immer da, oft in der alten Variante „vi“ </li>
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<li class="fragment">Vi IMproved</li>
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<li class="fragment">komplett per Kürzel steuerbar </li>
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<li class="fragment">umfassend anpassbar </li>
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<li class="fragment">erweiterbar </li>
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<li class="fragment">syntax highlighting </li>
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<li class="fragment">vim ist einfach cool ;-)</li>
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</ul>
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<section>
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<h3>LINKS</h3>
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<p>http://tldp.org/LDP/abs/html/complexfunct.html
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<p>http://programmingexamples.wikidot.com/bash-scripting#toc24
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<p>https://wiki.ubuntuusers.de/Shell/Bash-Skripting-Guide_für_Anfänger/#Quoting
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<div>
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- script kontrolle ( strg-z etc )
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- input
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- parameter
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- functions
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- kontrollstrukturen
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-
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</section>
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<section>
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<h3>Variablen</h3>
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<pre><code>#!/bin/bash
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x=10 #NICHT x = 10 -> keine Leerzeichen!
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X=20 #variablen sind Case Sensitive
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$y= #NULL variable
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echo "x = $x"
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echo "X = $X"
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echo "y = $y"</code></pre>
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</section>
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<section>
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<h3>Kommentare</h3>
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<pre><code>
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#!/bin/bash
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# Diese Zeile ist ein Kommentar
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echo "A comment will follow." # Comment here.
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echo "The # here does not begin a comment."
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echo 'The # here does not begin a comment.'
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echo The \# here does not begin a comment.
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echo The # here begins a comment.
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echo ${PATH#*:} # Parameter substitution, not a comment.
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echo $(( 2#101011 )) # Base conversion, not a comment.
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</code>
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</pre>
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</section>
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<section>
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<h3>Quotes</h3>
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<ul>
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<li class="fragment ">Double Quotes: " " -Anything enclose in double quotes removed meaning of that characters (except \ and $).</li>
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<li class="fragment ">Single quotes: ' ' - Enclosed in single quotes remains unchanged.</li>
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<li class="fragment ">Back quote: ` ` - To execute command</li>
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</ul>
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</section>
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<section>
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<h3>Input - Output redirection</h3>
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<ul>
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<li class="fragment "> > : output in Datei. Best. Datei wird überschrieben!</li>
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<li class="fragment "> >> : output an Datei anhängen.</li>
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<li class="fragment "> < : Kommando Input aus Datei lesen</li>
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</ul>
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<pre><code>#!/bin/bash
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echo "ls > file_list"
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ls > file_list
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echo "ls -la >> file_list"
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ls -la >> file_list
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echo "cat < file_list"
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cat < file_list</code></pre>
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</section>
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<section>
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- arithmetik
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let "m = 4 * 1024";echo $m
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let "m += 15"
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let "m -= 3"
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let "m /= 5"
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let "m %= 10"
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let "m++"
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let "m--"
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let "k = (m < 9) ? 0 : 1"
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condition ? value-if-true : value-if-false
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Floating Poin:
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echo "32.0 + 1.4" | bc
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echo `expr $m + 18`
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m=`expr $m + 18`
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(( m *= 4 ))
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</section>
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<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
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</section>
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<section>
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<h3>Die 5 Level eines Vim Magiers</h3>
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<ul>
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@ -0,0 +1,17 @@
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#!/bin/bash
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suf=$1
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if [ $# -gt 0 ]
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then
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for f in *.$suf; do
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bn=`basename "$f" .$suf | sed 's/IMG_//'`
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new=$bn.$suf
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echo "neuer Dateiname:"
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echo $new
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mv "$f" $new
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done
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else
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echo "Kein Suffix gegeben!!"
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echo "Verwendung: strip-space.sh SUFFIX"
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echo "Beende ...."
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exit 1
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fi
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@ -0,0 +1,8 @@
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#!/bin/bash
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x=10 #NOT x = 10 no spaces
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X=20 #variables are case sensitive
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$y= #NULL variable
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echo "x = $x"
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echo "X = $X"
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echo "y = $y"
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@ -0,0 +1,10 @@
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#!/bin/bash
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# This line is a comment.
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echo "A comment will follow." # Comment here.
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echo "The # here does not begin a comment."
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echo 'The # here does not begin a comment.'
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echo The \# here does not begin a comment.
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echo The # here begins a comment.
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echo ${PATH#*:} # Parameter substitution, not a comment.
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echo $(( 2#101011 )) # Base conversion, not a comment.
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@ -0,0 +1,28 @@
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#!/bin/bash
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# Beispiel für Rekursive Funktion
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#Funktions-Definition
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function sum() {
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if [ -z "$2" ]; then
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#Rückgabewert
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echo $1
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else
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a=$1;
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#Parameter werden nach links verschoben : orkus <- $1 , $1 <- $2
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shift;
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#Funktion ruft sich selbst auf - Rekursion
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#Ergebnis. b == 2
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b=`sum $@`
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echo `expr $a + $b` # <- 1 + 2
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fi
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}
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# Funktions-Aufruf mit 2 Parametern
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sum 1 2
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# Script to create simple menus and take action according to that selected
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# menu item
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#
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while :
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do
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clear
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echo "-------------------------------------"
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echo " Main Menu "
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echo "-------------------------------------"
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echo "[1] Show Todays date/time"
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echo "[2] Show files in current directory"
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echo "[3] Show calendar"
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echo "[4] Start editor to write letters"
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echo "[5] Exit/Stop"
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echo "======================="
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echo -n "Enter your menu choice [1-5]: "
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read yourch
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case $yourch in
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1) echo "Today is `date` , press a key. . ." ; read ;;
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2) echo "Files in `pwd`" ; ls -l ; echo "Press a key. . ." ; read ;;
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3) cal ; echo "Press a key. . ." ; read ;;
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4) vi ;;
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5) exit 0 ;;
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*) echo "Opps!!! Please select choice 1,2,3,4, or 5";
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echo "Press a key. . ." ; read ;;
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esac
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done
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