sysctl
sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=1
sudo sysctl -p
or append the following lines to /etc/sysctl.conf
sudo nano /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.lo.disable_ipv6=1
and apply changes (or reboot)
sudo sysctl -p
grub
Add the following param ipv6.disable=1 to /etc/default/grub
sudo nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash ipv6.disable=1"
GRUB_CMDLINE_LINUX="ipv6.disable=1"
and apply changes
sudo update-grub
Apply grub changes in Arch Linux
sudo grub-mkconfig -o /boot/grub/grub.cfg