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colhountech/disable ipv6 on ubuntu

Last active January 20, 2021 19:38
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disable ipv6 on ubuntu
# /etc/sysctl.conf:
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
# reboot
sudo reboot
# sudo vi /etc/default/grub
# add
GRUB_CMDLINE_LINUX_DEFAULT="quiet ipv6.disable=1"
# update grub
sudo update-grub
sudo reboot
# search for boot command line to confirm
grep Command /var/log/kern.log
# test if disabled
test -f /proc/net/if_inet6 && echo "ipv6 enabled" || echo "no ipv6"
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