simple bash

A good and compact Bash reference

Another good introduction. More complete.

A Very Simple example:

#!/bin/bash

i=0
while [ $i -lt 400 ]; do
   printf "%i : %b\n" "$i" "\0$i"
   let "i++"
done

Getting the script path

SCRIPT_PATH="${BASH_SOURCE[0]}";
if([ -h "${SCRIPT_PATH}" ]) then
 while([ -h "${SCRIPT_PATH}" ]) do SCRIPT_PATH=`readlink "${SCRIPT_PATH}"`; done
fi                                                                                                                                           
pushd . > /dev/null
cd `dirname ${SCRIPT_PATH}` > /dev/null
SCRIPT_PATH=`pwd`;
popd  > /dev/null

Wireless evolution to 4G

Nice summary here: http://www.edn.com/contents/images/6648778f1.pdf