Q. Can you tell me how can I find out MAC address under Linux or FreeBSD server?
A. A mac address is acronym for media access control address, is a unique address assigned to almost all-networking hardware such as Ethernet cards, router etc. Most layer 2 network protocols use one of three numbering spaces managed by the IEEE: MAC-48, EUI-48, and EUI-64, which are designed to be globally unique. (see mac address at wikipedia for more information).
Following command work with Linux and other UNIX oses:
ifconfig command
Ifconfig is used to configure the kernel-resident network interfaces.
In order to find out MAC address of system you can use ifconfig command as follows:
$ /sbin/ifconfig | grep HWaddr
Output:
eth0 Link encap:Ethernet HWaddr 00:0F:EA:91:04:07
OR
$ /sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:0F:EA:91:04:07
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20f:eaff:fe91:407/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:60400 errors:0 dropped:0 overruns:0 frame:0
TX packets:109216 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:69273219 (66.0 MiB) TX bytes:14285799 (13.6 MiB)
Interrupt:18 Base address:0xc000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:3869 errors:0 dropped:0 overruns:0 frame:0
TX packets:3869 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:396498 (387.2 KiB) TX bytes:396498 (387.2 KiB)
OR as a root user type following command:
# grep eth0 /var/log/dmesg
eth0: RealTek RTL8139 at 0xc000, 00:0f:ea:91:04:07, IRQ 18 eth0: Identified 8139 chip type 'RTL-8100B/8139D' eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
FreeBSD example
# ifconfig
Output:
lnc0: flags=108843 mtu 1500
inet 74.xx.yy.zzz netmask 0xfffffff0 broadcast 74.xx.yyy.zzz
ether 00:0c:29:b8:92:8b
plip0: flags=108810 mtu 1500
lo0: flags=8049 mtu 16384
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
inet6 ::1 prefixlen 128
inet 127.0.0.1 netmask 0xff000000
See also:
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If your FreeBSD machine is up too long, the dmesg might have cycled and is not visible. The ifconfig command does not display the HW address in FreeBSD. The sysctl command does not hold the value, so, I am basically lost. :(
thank you
Use
ifconfig -a
because that will show you the MAC address even if you’re not connected.
Thanks for the help.
Just want to know how would I find out the MAC address of a linux machine on my network(remotely)?
Thanks in advance.
Now,
ifconfig | grep ether
OutPut:
ether 00:90:7c:5d:0b:24
ether 00:c9:c2:87:94:83
ether 00:05:58:57:e5:74
how to get same thing(00:90:7c:5d:0b:24) in windows operating system
using PHP