how to get your mac address linux debian

If (ioctl(sock, SIOCGIFCONF, &ifc) = -1) Ĭonst struct ifreq* const end = it + (ifc. It isnt that it NEVER works, it is just unpredictable. If you are only interested in the default IP address that connects to the internet, use a grep parameter to list that one. ip route list ip route list command usage in Ubuntu 17.10 It should display all available IP address including device names.

Or in GNOME, go to Settings > Wi-Fi or Network > Identity, and enter a custom MAC address. Launch ‘Terminal’ and enter the following command to list all the IP address. Int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP) Im using the following code to get the MAC address of eth0 into a variable for use in a filename, but it rarely every works. Dave McKay Mar 31, 2023, 11:00 am EDT 6 min read fatmawati achmad zaenuri/Shutterstock You can set a permanent new MAC address in the terminal using the macchanger utility and a systemctl unit file. 'We have not been faced with the need to satisfy someone else's requirements, and for this freedom we are grateful. If you're not sure, do ifconfig -a to show all connections. Keep up with the conversation with our apps for Mac, Windows and Linux. You also want to skip the loopback interface. Name of connection probably wlan0, but that can vary. The mac address will be obtained as a 6-octet binary array. ifconfig -a | grep -ioE '(.)/ & print $1'Ĭoreutils.You need to iterate over all the available interfaces on your machine, and use ioctl with SIOCGIFHWADDR flag to get the mac address. The same regex also works with PCREs ( -P). The -i makes the match case insensitive and the -o makes grep print only the matched portion. Here, I am looking for 5 repetitions of 2 letters or numbers followed by a colon, then any two characters.

There are various regular expressions that will pick these up.

How to get your mac address linux debian