![]() # getmacifup.sh: Print active NICs MAC addressesĪnd here's its output on a system with an ethernet and a wifi interface: $. You can then get the MAC address of that interface with: $ cat /sys/class/net/enp0s25/addressįor example, here's a simple bash script that prints MAC addresses for active interfaces: #!/bin/bash For example, here's how you can see if enp0s25 is up: $ cat /sys/class/net/enp0s25/operstate ![]() You can check if an interface is up looking at operstate in the device directory. a router / firewall the MAC address of the client is not in the tcp/ip headers at all, and You'd only get it in the form of contextual data actually passed from the client. once you have crossed a layer 3 barrier, i.e. Rep: It's technically none of your business what the mac address is. On a modern GNU/Linux system you can see the available network interfaces listing the content of /sys/class/net/, for example: $ ls /sys/class/net/ Distribution: Gentoo, RHEL, Fedora, Centos. How do I find it ? Also it should work on all the Linux flavours. Is there an easy way to view MAC address by hardware device I know you could sling together a whole bunch of Bash logic with sed to do this but I figure there has to be an easier way to get this info. So in this case I want the HWaddr for eth1 and not eth0. ![]() NOTE : I have changed the values of the output. UP BROADCAST RUNNING MULTICAST MTU:123 Metric:123 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:123 NetworkManager status STATE CONNECTIVITY WIFI-HW WIFI WWAN-HW WWAN 3- To get some informations. it has an inet address, I even don't want one having inet6). Ashutosh Maurya created a doc in the group: (LINUX ONLY). On Ethernet interfaces, this will be a MAC address in string representation, separated by colons. So is there a way I could get the MAC address for the first available interface that is Active.(i.e. Returns the low-level hardware address for this interface. Also on OS X the interface names are different.Īlso the interface eth0 may be present but is unused. Currently all the solution mentioned for getting the MAC address always use eth0.īut what if instead of eth0 my interfaces start with eth1.
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