wget -N https://mhyidc.com/IPv6_Check_Ver2.sh&&chmod 0755 IPv6_Check_Ver2.sh&&bash IPv6_Check_Ver2.sh
ip a add 优选的ipv6 dev eth0 添加ip
ip a del 优选ipv6 dev eth0删除某个ipv6来源：https://www.nodeseek.com/post-90970-1
wget -N https://mhyidc.com/IPv6_Check_Ver2.sh&&chmod 0755 IPv6_Check_Ver2.sh&&bash IPv6_Check_Ver2.sh
ip a add 优选的ipv6 dev eth0 添加ip
ip a del 优选ipv6 dev eth0删除某个ipv6来源：https://www.nodeseek.com/post-90970-1
