给定IP地址，在同一子网中查找接口

Question

I'm trying to create a bash script and a small part of it requires figuring out if, given an IP address of another computer, what interface is on that same network.

So if my computer is has the following interfaces (not including lo):

eth0      Link encap:Ethernet  HWaddr XX
          inet addr:192.168.0.100  Bcast:192.168.0.255  Mask:255.255.255.0

wlan0     Link encap:Ethernet  HWaddr XX
          inet addr:192.168.5.100  Bcast:192.168.5.255  Mask:255.255.255.0

and I know that there is a computer at the following address:

192.168.0.101

is there a simple way to extract the answer eth0 ?

PS This question is NOT asking about getting the the interface given the address of my own computer like this post is .

Answer 1

no, the name eth0 is not broadcasted in any way, so there is no way to get it remotely. it is just a name that is only internally used. You'd have to log into the remote machine (ssh) and get the info using for example ifconfig .

if you need the macaddress of the remote machine (on your network) use arp:

arp 192.168.0.101