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How can I get unformatted ip address information in the shell?

rated 0 times [ 4] [ 0] / answers: 1 / hits: 2480 / 3 Years ago, tue, june 1, 2021, 2:16:51

I'm writing a shell script which needs information on the state of the network connection - the basic stuff like ip address, subnet, netmask and so on.

I could just use ifconfig and sed/grep for the information, but I was hoping there was a cleaner way to do this - possibly using the ip command, or similar utilities.

I'm looking for something which could give the following results:

$ (magic command) ip

192.168.1.1

$ (magic command) netmask

255.255.255.0

$ (magic command) subnet

192.168.0.0

and possibly similar things for network gateway/dns servers.

Does such a command exist? Perhaps there's an --unformatted flag for ip or ifconfig? Am I too hopeful/naive?

Thanks :)

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anatta

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2 Years ago

answered 3 Years ago onbean · Accepted Answer

You can also use ifdata to get information without parsing output of ip with grep, awk or other tools:

[~]$ ifdata -pa eth0

192.168.246.161

[~]$ ifdata -pn eth0

255.255.240.0

[~]$ ifdata

Usage: ifdata [options] iface

     -e   Reports interface existence via return code

     -p   Print out the whole config of iface

    -pe   Print out yes or no according to existence

    -pa   Print out the address

    -pn   Print netmask

    -pN   Print network address

    -pb   Print broadcast

    -pm   Print mtu

    -ph   Print out the hardware address

    -pf   Print flags

    -si   Print all statistics on input

   -sip   Print # of in packets

   -sib   Print # of in bytes

   -sie   Print # of in errors

   -sid   Print # of in drops

   -sif   Print # of in fifo overruns

   -sic   Print # of in compress

   -sim   Print # of in multicast

    -so   Print all statistics on output

   -sop   Print # of out packets

   -sob   Print # of out bytes

   -soe   Print # of out errors

   -sod   Print # of out drops

   -sof   Print # of out fifo overruns

   -sox   Print # of out collisions

   -soc   Print # of out carrier loss

   -som   Print # of out multicast

  -bips   Print # of incoming bytes per second

  -bops   Print # of outgoing bytes per second