How to disable IPv6 on Linux

1. Ubuntu/Debian/Centos     Edit the /etc/sysctl.conf file.      – sudo nano /etc/sysctl.conf    Place the following entry to disable IPv6 for all adapters.      – net.ipv6.conf.all.disable_ipv6 = 1      – net.ipv6.conf.default.disable_ipv6 = 1      – net.ipv6.conf.lo.disable_ipv6 = 1    To reflect the changes execute the following command.      – sudo sysctl -p