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Accepted
Karlom
Asked: 2017-06-27 06:56:10 +0800 CST

How to define localhost IP as 10.0.2.2?

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On my Ubuntu PC, I need to use 10.0.2.2 instead of 127.0.0.1 to be able to let Android emulator to connect to web server running on localhost. So wondering how can I define the new IP?

I edited /etc/hosts and added

10.0.2.2    localhost
10.0.2.2    subdomain.localhost

Instead and restarted the hosts using /etc/init.d/hostname.sh. But ifconfig still does not show the new ip. How can I fix this?

networking

1 Answers

  1. Best Answer

    You don't need to change /etc/hosts or machine hostname. These are just for name resolution. You need to bring up a loopback interface with this ip. So we will bring a copy of loopback (lo:1) with this ip:

    $ sudo ifconfig lo:1 10.0.2.2 up

    Then you can use ifconfig to see if its up. It will appear like:

    lo:1      Link encap:Local Loopback  
          inet addr:10.0.2.2  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1

    You can use ssh to this ip.

    To make this permanent you can add it to /etc/rc.local .

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