Beispiele für Unix-Skript-Programmierung und reguläre Ausdrücke

20161020/regular-expressions.log

+cassini/home/peter/bo/2016ws/es/20161020> echo "Hello, world!" | grep "^H[aeiou]"
+Hello, world!
+cassini/home/peter/bo/2016ws/es/20161020> echo "HEllo, world!" | grep "^H[aeiou]"
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hxllo, world!" | grep "^H[aeiou]"
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hxllo, world!" | grep "^H[^xyz]"
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hello, world!" | grep "^H[^xyz]"
+Hello, world!
+cassini/home/peter/bo/2016ws/es/20161020> cat xkcd.sh
+#!/bin/sh
+echo -n "http:"
+curl -s http://xkcd.com \
+  | grep "img src="  \
+  | grep -v "terrible_small_logo" \
+  | grep -v "Selected Comics" \
+  | sed -e 's/^[^"]*"//' \
+  | sed -e 's/".*$//'
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hello, world!" | sed -e 's/ll/xx/'
+Hexxo, world!
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hello, world!" | sed -e 's/ll//'
+Heo, world!
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hello, world!" | sed -e 's/^ll//'
+Hello, world!
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hello, world!" | sed -e 's/^.*ll//'
+o, world!
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hello, world!" | sed -e 's/^[aeiou]*ll//'
+Hello, world!
+cassini/home/peter/bo/2016ws/es/20161020> echo "Hello, world!" | sed -e 's/^[Haeiou]*ll//'
+o, world!
+cassini/home/peter/bo/2016ws/es/20161020>

20161020/xkcd.sh

+#!/bin/sh
+echo -n "http:"
+curl -s http://xkcd.com \
+  | grep "img src="  \
+  | grep -v "terrible_small_logo" \
+  | grep -v "Selected Comics" \
+  | sed -e 's/^[^"]*"//' \
+  | sed -e 's/".*$//'