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Full Discussion: Shell script to ping a range of IPs
Top Forums Shell Programming and Scripting Shell script to ping a range of IPs Post 302364356 by Scrutinizer on Thursday 22nd of October 2009 09:49:26 PM
Old 10-22-2009
This script is a bit more elaborate as it will perform the probes in parallel, so it doesn't take much time
Code:
probe () {
  ping -c1 -w5 $1 >&- 2>&- || touch /tmp/pingfail.$1
}
rm /tmp/pingfail.* 2>&-
for i in $(seq 1 50); do
  probe 192.168.0.$i &
done;
wait
for failip in /tmp/pingfail.*; do
  echo ${failip#*.}
done|sort -nt. -k1,1 -k2,2 -k3,3 -k4,4
rm /tmp/pingfail.* 2>&-

You'd have to check if the ping on your system supports these options or use something equivalent, so that the ping stops after a number of seconds:

My man ping:

-c count
Stop after sending count ECHO_REQUEST packets. With deadline option, ping waits for count
ECHO_REPLY packets, until the timeout expires.

-w deadline
Specify a timeout, in seconds, before ping exits regardless of how many packets have been
sent or received. In this case ping does not stop after count packet are sent, it waits
either for deadline expire or until count probes are answered or for some error notification
from network.
Last edited by Scrutinizer; 10-22-2009 at 11:01 PM..
 

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LEARN ABOUT DEBIAN

grepcidr

GREPCIDR(1)						      General Commands Manual						       GREPCIDR(1)

NAME

       grepcidr -- Filter IP addresses matching IPv4 CIDR/network specification

SYNOPSIS

       grepcidr [-V]  [-c]  [-v]  [-e pattern | -f file]

DESCRIPTION

       This manual page documents briefly the grepcidr command.

       This manual page was written for the Debian distribution because the original program does not have a manual page.

       grepcidr  can  be  used to filter a list of IP addresses against one or more Classless Inter-Domain Routing (CIDR) specifications, or arbi-
       trary networks specified by an address range. As with grep, there are options to invert matching and load patterns from a  file.   grepcidr
       is capable of comparing thousands or even millions of IPs to networks with little memory usage and in reasonable computation time.

OPTIONS

       -V	 Show software version

       -c	 Display count of the matching lines, instead of showing the lines

       -v	 Invert the sense of matching, to select non-matching IP addresses

       -e	 Specify pattern(s) on command-line

       -f	 Obtain CIDR and range pattern(s) from file

EXAMPLES

       grepcidr -f ournetworks blocklist > abuse.log

       Find our customers that show up in blocklists

       grepcidr 127.0.0.0/8 iplog

       Searches for any localnet IP addresses inside the iplog file

       grepcidr "192.168.0.1-192.168.10.13" iplog

       Searches for IPs matching indicated range in the iplog file

       script | grepcidr -vf whitelist > blacklist

       Create a blacklist, with whitelisted networks removed (inverse)

       grepcidr -f list1 list2

       Cross-reference two lists, outputs IPs common to both lists

AUTHOR

       This  manual  page  was written by Ryan Finnie ryan@finnie.org for the Debian system (but may be used by others).  Permission is granted to
       copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later  version  published	by
       the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.

																       GREPCIDR(1)
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