Fetch the Gateway Ip Address

netstat -nr | awk 'BEGIN {while ($3!="0.0.0.0") getline; print $2}'
This is to fetch the Gateway Ip Address of a machine. Use the below format to put the value in a variable if you wish to find the gateway ip in a script GATEWAY=$(netstat -nr | awk 'BEGIN {while ($3!="0.0.0.0") getline; print $2}')

1
2010-03-07 01:47:55

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What Others Think

Well unfortunately this did not work on my BSD box... but you could us this instead. For FreeBSD either of these will work. awk -F '"' '/defaultrouter/{print $2}' /etc/rc.conf netstat -nr | awk '/default/{ print $2}' Now on Mac OS X it get's a little trickier because IPv6 is enabled by default. The following works for me. netstat -nr | awk '/default/{ print $2;exit}' Oh on FreeBSD there's a third option if your are running bash but it can get messy. This reads the file into the shell as an include script Remember bash is not installed by default on and BSD. . /etc/rc.conf echo $defaultrouter Cheers, Mikel King
mikelking · 432 weeks and 3 days ago
Pretty cool, I should have actually used the subject line "Fetch the Gateway Ip Address on Linux" ...
freethinker · 432 weeks and 3 days ago

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