Home / server / Questions / 477562
Accepted
Randomblue
Asked: 2013-02-12 02:34:27 +0800 CST

Extract ip, mask and gateway of a network interface separately

  • 772

I know that the command ifconfig will give you ip, mask and gateway of a given network interface. I want to "programmatically" extract each of those paramaters separately. At the moment the best solution I can think of is to do some parsing by using grep.

Are there ifconfig flags to single out ip, mask or gateway? Are there other *nix commands that will extract just one parameter of a given network interface?

interface

1 Answers

  1. Best Answer

    Theses are not very elaborates but seems to work at least:

    for bond0:

    Get the IP

    ifconfig | awk '/bond0/ { getline; print}' | awk '{print $2}' | awk 'BEGIN {FS=":"} ; {print $2}'

    Get the the broadcast address:

    ifconfig | awk '/bond0/ { getline; print}' | awk '{print $3}' | awk 'BEGIN {FS=":"} ; {print $2}'

    Get the netmask:

    ifconfig | awk '/bond0/ { getline; print}' | awk '{print $4}' | awk 'BEGIN {FS=":"} ; {print $2}'

    and for the Gateway:

    route | awk '/default/ { print $2}'

    sure someone will get there with something more simple or straighforward.

    Hope this helps.

    • 1