#Bash script to get ip address mac
# 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. 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/ How do I find it ? Also it should work on all the Linux flavours. So in this case I want the HWaddr for eth1 and not eth0. It does this by using the hostname -I command, which retrieves a list of IP addresses associated with the machine.The output of this command is then piped to the awk command, which prints the first field from the list. NOTE : I have changed the values of the output. The provided Bash script retrieves the IP address of the machine and displays it. UP BROADCAST RUNNING MULTICAST MTU:123 Metric:123
The third command will return the owners preferred address, which may either an IPv4 or an IPv6 address. The second command returns the resolved IPv6 address.
The first command returns the resolved IPv4 address. If the host points to a CNAME it will also get the IP in that case. TX packets:123 errors:123 dropped:123 overruns:123 carrier:123 All commands will resolve an IP address if the host still exists. I want to use only some of the informations that commands give. RX packets:123 errors:123 dropped:123 overruns:123 frame:123 Linux bash script to extract IP address - Stack Overflow I want to make big script on my Debian 7.3 ( something like translated and much more new user friendly enviroment ). UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:123 it has an inet address, I even don't want one having inet6). So is there a way I could get the MAC address for the first available interface that is Active.(i.e.
Also on OS X the interface names are different.Īlso the interface eth0 may be present but is unused. Currently I am using c program but I want to do this using shell script. Currently all the solution mentioned for getting the MAC address always use eth0.īut what if instead of eth0 my interfaces start with eth1. I want to get host name and (single) host address and save it to variable of type string using a bash shell script.
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