find PCs in a network 
Thursday, June 5, 2008, 10:51 - Network, Programming
Posted by Administrator
for i in $(seq 2 254); do ping -c 1 192.168.0.$i | grep -q rtt && echo "found 192.168.0.$i"; done

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bash network calculation 
Friday, January 18, 2008, 17:02 - Programming
Posted by Administrator
IP='130.10.10.10'
NETMASK='255.255.252.0'

l="${IP%.*}";r="${IP#*.}";n="${NETMASK%.*}";m="${NETMASK#*.}"

SUBNET=$((${IP%%.*}&${NETMASK%%.*})).\
       $((${r%%.*}&${m%%.*})).\
       $((${l##*.}&${n##*.})).\
       $((${IP##*.}&${NETMASK##*.}))

l="${SUBNET%.*}";r="${SUBNET#*.}"

BROADCAST=$((${SUBNET%%.*}|256+~${NETMASK%%.*})).\
          $((${r%%.*}|256+~${m%%.*})).\
          $((${l##*.}|256+~${n##*.})).\
          $((${SUBNET##*.}|256+~${NETMASK##*.}))
SUBNET is 130.10.8.0
BROADCAST is 130.10.11.255

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date with unix timestamp 
Wednesday, December 5, 2007, 10:39 - Programming
Posted by Administrator
date in unix timestamp: date +%s

convert unix timestamp to date: date --date "Jan 1, 1970 00:00:00 +0000 + $1 seconds"

set date with unix timestamp: date -s "Jan 1, 1970 00:00:00 +0000 + $1 seconds"


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quick base64 encode/decode 
Wednesday, November 14, 2007, 16:52 - Programming
Posted by Administrator
perl -MMIME::Base64 -e 'print encode_base64("string");'

perl -MMIME::Base64 -e 'print decode_base64("c3RyaW5n");'

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usbmonitor libusb usbsniff 
Thursday, October 18, 2007, 15:26 - Programming
Posted by Administrator
Linux Kernel:

modprobe usbmon
mount -t debugfs none_debugs /sys/kernel/debug
cat /sys/kernel/debug/usbmon/<x>t (x=Gerätenummer 1,2,3,...)

libusb with radare/libusbsniff:
LD_PRELOAD=/usr/lib/libusbsniff.so ./my-usb-program


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