Disable IPv6 on Ubuntu
Edit `/etc/sysctl.conf` and and add the following 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
After that run:
cat /proc/sys/net/ipv6/conf/all/disable_ipv6
If it reports `1` means you have disabled IPV6. If it reports `0` then continue to follow the guide.
Run command:
sysctl -p
you will see this in terminal:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
Run the following again:
cat /proc/sys/net/ipv6/conf/all/disable_ipv6