ITzoo.de - Admin-FAQ

For-Schleife

#!/bin/bash for i in $( ls ); do    echo item: $i done     

While-Schleife

#!/bin/bash  COUNTER=0 while [  $COUNTER -lt 10 ]; do    echo The counter is $COUNTER    let COUNTER=COUNTER+1  done     

While-Schleife zum generieren von code

While-Schleife zum ersetzen von IP in Apache-Config

grep -rl 1.2.3.4 /etc/apache2/ | while read i; do sed -i 's/1.2.3.4/4.3.2.1/g' $i; done

Until-Schleife

#!/bin/bash  COUNTER=20 until [  $COUNTER -lt 10 ]; do    echo COUNTER $COUNTER    let COUNTER-=1 done     

If-Anweisung

if [ "$1" = "text" ]; then
echo "True"
else
echo "False"
fi

If-Anweisung zum Test auf Lockfile

(alles eine Zeile ohne Umbruch)

LOCKFILE="/var/lock/script.lock" ; COMMAND="svn up /var/www/"; date;

 if [ ! -f "$LOCKFILE" ] ; then echo "creating lockfile...";

 touch $LOCKFILE; echo "running command \"$COMMAND\"..."; $COMMAND;

 echo "removing lockfile..."; rm $LOCKFILE;

 else echo "lockfile already exists...-not- running command \"$COMMAND\""; fi