whenever a broadcast packet is sent by a box request for an IP, a DHCP server a resonse acknowledging the request. Any packet sniffing tool like tcpdump or wireshark can capture those packets and report about them. So if u could write a script to chk those we hav a monitoring script in place to find unsolicited DHCP servers in your network...
:) :)

" diff " and ' rsync ' commands should probably help you write a script for comparision and keeping sync between directories...

below is for getting only IP using CUT

wget -q checkip.dyndns.org -O index.html && cat index.html|cut -d ' ' -f 6 | cut -d '<' -f 1

I am not sure if SED is the string manipulator to use for this kind of outputs.

I used cut and Below command could work for you..

wget -q checkip.dyndns.org -O index.html && cat index.html | cut -d '>' -f 7 | cut -d '<' -f 1

Cheers,
blue_raptor

hey,

i guess the issue is not with existence of /bin/sh file but with character '^M' that is present in the script. If you see the error it says something like " /bin/sh^M " so let me guess did u copy the script from windows file to unix box?
if so then before executing type teh below command-

#dos2unix <script_name>

cheers,
blue_raptor