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How to get back IPV6 back

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I'm afraid that I've done an incredibly stupid thing. First. I removed IPV6 from my system. Second, I upgraded to Ubuntu13.04. Third, I misplaced the instructions for deleting IPV6. Now, I evidently need IPV6 and don't know how to reverse my past sins can someone help me out? I think that I removed ipV6 by changing a configuration file and then remaking Grub.

I can't even find the configuration file in 13.04.

posted May 20, 2013 by anonymous

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Why do you feel that you need IPv6? Ubuntu doesn't need it. It doesn't need a network at all.
commented May 21, 2013 by anonymous

1 Answer

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I don't know how you could disable ipV6 using grub when it boots up, and although I haven't done it myself, my google seach found a way (/etc/sysctl.conf) doing that. If you haven done this way, you just need to undo it.
http://linuxpoison.blogspot.tw/2010/10/how-to-disable-ipv6-in-ubuntu-linux.html

In the worst case (like me who don't have enough knowledge for a sophisticated way) I would just reinstall it after making a backup, or install it to another HD and attach the current HD after installation to copy any files, just like I do every time when I upgrade a Linux system. So I guess it's not an end of the world.

answer May 21, 2013 by anonymous
1.You can add "ipv6.disable=1" to the kernel common-line to disable ipv6.
2.You have to edit "/etc/default/grub" and run "update-grub".
commented May 21, 2013 by anonymous
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