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see also [http://www-128.ibm.com/developerworks/library/l-bash2.html]
=== Don't do this at home, kids: ===
bash fork-bomb (will turn your computer into a bomb). may be prevented by using ulimits or other stuff.
<pre>
:(){(:&:)};:
</pre>
[[Category:Programming]]
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Revision as of 16:55, 20 March 2006
Question from Pastebin
#!/bin/bash IPS=$(ifconfig | awk '/inet/ { print $2 }' | awk -F ":" '{ print $2 }') NUMIPS=$(echo $IPS | wc -w) COUNT=1 for i in $IPS do export IP$COUNT=$i COUNT=`expr $COUNT + 1` done # ----------------- # I need to display all ips like this to user: # # 1. 123.123.123.123 # 2. 22.22.22.22 # 3. 32.32.32.222 # # Please choose which IP address to use: # Prompt user here
< planetxm> on Efnet #debian 02:33, 25 Feb 2005 (CET)
Answer
#!/bin/bash # IPS=$(ifconfig | awk '/inet/ { print $2 }' | awk -F ":" '{ print $2 }') IPS="192.168.23.5 47.45.56.11 189.67.24.21" count=1 for IP in $IPS; do IP[$count]=$IP; echo "Found IP $count - ${IP[count]}"; count=`echo $count+1 | bc` done read -p "Which IP do you want to use? (number)" choice IPCHOICE=${IP[$choice]} echo "Your choice was $choice - Setting IP to $IPCHOICE " # ifconfig ...
mutante 02:33, 25 Feb 2005 (CET)
Schwanzersatzfaktor-Berechnung
Das folgende Shell-Script (by unbekannt) errechnet den Schwanzersatz-Faktor eines Linux-Rechners:
#!/bin/sh LC_ALL=C echo `uptime|grep days|sed 's/.*up \([0-9]*\) day.*/\1\/10+/'; \ cat /proc/cpuinfo|grep MHz|awk '{print $4"/30 +";}'; free|grep '^Mem' \ |awk '{print $3"/1024/3+"}'; df -P -k -x nfs | grep -v 1k \ | awk '{if ($1 ~ "/dev/(scsi|sd)"){ s+= $2} s+= $2;} END \ {print s/1024/50"/15+70";}'`|bc|sed 's/\(.$\)/.\1cm/'
from [1]
see also Schwanzersatzfaktor
For each file or directory
for mydir in web* do if [ -d "$mydir" ] then rm -r ./$mydir/generic/ cp -r ./generic/ $mydir echo "$mydir - done" fi done
see also [2]
Don't do this at home, kids:
bash fork-bomb (will turn your computer into a bomb). may be prevented by using ulimits or other stuff.
:(){(:&:)};: