Ubuntu 14.04 Disable IPv6

How to disable IPv6 in ubuntu 14.04/12.04

Edit /etc/sysctl.conf by nano/vim/gedit as sudo privileged mode

sudo nano /etc/sysctl.conf

and add the below lines at the end

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

and save the file and exit.

Execute the below command to update the latest

sudo sysctl -p

If you exexute " cat /proc/sys/net/ipv6/conf/all/disable_ipv6", you should get value 1. If you get 1, then IPv6 is disabled!

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