Linux Poison shows you how to disable ipv6 in Ubuntu Linux

IPV6 got many new exciting features but if you are on an IPV6 network, I don't think there is any benefit to having this protocol enabled.

First, check if IPv6 is enabled by running the following command. If the output is 0, it means its enabled. If it’s 1, then its disabled already.

  How to disable ipv6 in Ubuntu Linux