How to disable ipv6 in ubuntu linux

FREQUENTLY ASKED QUESTIONS (Ubuntu)
Q: How to disable IPv6 in ubuntu linux?

Disable IPv6 if you do not use in your network.
Edit the sysctl configuration file in /etc/ directory 



user@ubuntu:~$ sudo vi /etc/sysctl.conf
#Add the below line to bottom of the "sysctl.conf" file
net.ipv6.conf.all.disable_ipv6=1
#(save the file)
click to enlarge (disable ipv6 in ubuntu)
And now reboot your ubuntu machine
user@ubuntu:~$ sudo reboot


Verify the IPv6 is disabled
user@ubuntu:~$ ifconfig                 (verify ipv6 address is not showing)





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