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Full Discussion: Compare IP addresses and increment
Top Forums Shell Programming and Scripting Compare IP addresses and increment Post 302859807 by Manu1234567 on Thursday 3rd of October 2013 11:58:01 PM
Old 10-04-2013
Compare IP addresses and increment
Basically, I have 2 files with IP address. For example 134.123.3.234 in the first file and 134.123.3.235 in the second. Now I want to create a file with a IP address with IP 134.123.3.236...(max 254). So i have to check files which IP address in previous two files and base on that to create a new file with the next IP address which is 134.123.3.236. I wanted to check last number of IP...If it is 254 then increment +1 to third number....


Code:
for ip in {0..254}
do
if "192.168.${ip}.${j}" > $file
 echo "192.168.${ip}.${j}"> Newfile.txt
for j in {0..254}
 do
if "192.168.${ip}.${j}">$file then 
echo "192.168.${ip}.${j}"> Newfile1.txt
done
done

Basically, this code is not correct. Have no idea how to solve this problem. Hope you will help me....thanks.
Last edited by Don Cragun; 10-04-2013 at 01:36 AM.. Reason: Add CODE tags
 

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LEARN ABOUT FREEBSD

nos-tun

NOS-TUN(8)						    BSD System Manager's Manual 						NOS-TUN(8)

NAME

     nos-tun -- implement ``nos'' or ``ka9q'' style IP over IP tunnel

SYNOPSIS

     nos-tun -t tunnel -s source -d destination -p protocol_number [source] target

DESCRIPTION

     The nos-tun utility is used to establish an nos style tunnel, (also known as ka9q or IP-IP tunnel) using a tun(4) kernel interface.

     Tunnel is the name of the tunnel device /dev/tun0 for example.

     Source and destination are the addresses used on the tunnel device.  If you configure the tunnel against a cisco router, use a netmask of
     ``255.255.255.252'' on the cisco.	This is because the tunnel is a point-to-point interface in the FreeBSD end, a concept cisco does not
     really implement.

     Protocol number sets tunnel mode.	Original KA9Q NOS uses 94 but many people use 4 on the worldwide backbone of ampr.org.

     Target is the address of the remote tunnel device, this must match the source address set on the remote end.

EXAMPLES

     This end, a FreeBSD box on address 192.168.59.34:

	   nos-tun -t /dev/tun0 -s 192.168.61.1 -d 192.168.61.2 192.168.56.45

     Remote cisco on address 192.168.56.45:

	   interface tunnel 0
	   ip address 192.168.61.2 255.255.255.252
	   tunnel mode nos
	   tunnel destination 192.168.59.34
	   tunnel source 192.168.56.45

AUTHORS

     Nickolay N. Dudorov <nnd@itfs.nsk.su> wrote the program, Poul-Henning Kamp <phk@FreeBSD.org> wrote the man-page.  Isao SEKI
     <iseki@gongon.com> added a new flag, IP protocol number.

BUGS

     We do not allow for setting our source address for multihomed machines.

BSD
								  April 11, 1998							       BSD
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