rm -f /etc/sysctl.conf && echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf \ && echo "net.ipv6.conf.default.disable_ipv6 = 1" >> /etc/sysctl.conf \ && echo "net.ipv6.conf.lo.disable_ipv6 = 1" >> /etc/sysctl.conf \ && sysctl -p