How to get both IPv4 and IPv6 dynamic address

Question

Running dhclient gets me an IPv4 address.

Running dhclient -6 gets me an IPv6 address.

And the man page says you can't combine v4 and v6. So how to get both v4 and v6 addresses at the same time?

Answer 1

You can issue both commands and have them run concurrently in one line like:

(dhclient &); (dhclient -6 &)

You could then add it to a BASH script or alike, named how you'd like. :)

More info on combining commands in Linux:

• http://www.comptechdoc.org/os/linux/manual2/runningcommands.html
• http://ubuntuforums.org/showthread.php?t=531589
• https://stackoverflow.com/questions/13077241/execute-combine-multiple-linux-commands-in-one-line

Answer 2

If they can't be combined, you'll have to make two separate calls of dhclient and if you want this to run with one command, you could wrap it in a little shell-script. You can find infos on Bash-scripting here.