How Close IPv6 On Ubunutu Or Linux

Edit the /etc/sysctl.conf

vim /etc/sysctl.conf

add as below :

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

This command will apply immediately once executed.

sysctl -p 

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