Need help with IP and MAC addresses

Shell Programming and Scripting
1

Hi,
i am working on a project where i have to write a script to find out MAC addresses of the systems with given IP address.
Can anybody tell me which command i can use to find MAC address if you know IP address of the machine.
Thanks

2

User with root privileges:

ifconfig -a

Should give you ip address and mac address for all interfaces in your system.

3

Yes, i tried this one. but it gives me information (including MAC address) of ethernet interfaces only. but there are number of systems connected to it having ip address for e.g. 192.147.0.1 - 192.147.0.20 , 20 systems altogether. and i need to find MAC address for them individually...any help would be appreciated..
Thanks

4

Probably worth having a look here

5

Try 'arp -a'.

6

i checked arp -a it worked but fetching only systems present in my subnet. how to fetch info about everything?? is there a different command for it??