topic "for" instructions in Operating System - Linux

"for" instructions

Alpha977 — Tue, 13 Mar 2007 10:06:37 GMT

Hello to all!

i need to "ping" some nodes in my network.
Ping from 192.168.0.1 to 192.168.0.255.

I'm think to do a "for" action like this pseduo-code:

for ( i = 1; i< 255; i++)
{
ping 192.168.0. + "i"
}

but i don't know how to put this into my Hp-UX (PA-RISC) shell.

How i can do?

Thanks to all!

Points for all reply

Re: "for" instructions

A. Clay Stephenson — Tue, 13 Mar 2007 10:12:24 GMT

#!/usr/bin/sh

typeset -i i=1
typeset PREFIX="192.168.0."
typeset IP=""
while [[ ${i} -lt 255 ]]
do
IP="${PREFIX}${i}"
ping ${IP}
((i += 1))
done

Re: "for" instructions

Peter Nikitka — Tue, 13 Mar 2007 10:17:24 GMT

Hi,
the semantic depends on your shell.
Posix (ksh):
typeset -i i=0
while [ i+=1 -lt 255 ]
do ping 192.168.0.$i
done

(T)csh:
set i=1
while ($i < 255)
ping 192.168.0.$i
@ i++
end

mfG Peter

Re: "for" instructions

Alpha977 — Tue, 13 Mar 2007 10:25:32 GMT

I need this!

Thanks to all!