甲骨文掉ipv6的设置脚本

获取ipv6
AMD：dhclient -6 ens3
ARM：dhclient -6 enp0s6

脚本文件：

Debian_IPv6() {
 iName=$(ip add | grep "^2: " | awk -F'[ :]' '{print $3}')
 dhclient -6 $iName #临时开启IPv6
 echo $iName #人工查看网卡是否正确
 sed -i "$ a iface $iName inet6 dhcp" /etc/network/interfaces
 ifup $iName #重新启用网络接口，应用新的IPv6配置
 sleep 10s #等待10秒，确保IPv6已启用
 ip -6 route add default dev $iName #添加IPv6路由，优先使用IPv6连接
 ping -c 5 ipv6.google.com #ping 5次，自动停止ping
 pkill ping #停止正在执行的ping进程
 if [[ $(curl -sS -6 ifconfig.co) =~ ":" ]]; then
   echo "IPv6 is preferred."
 else
   echo "IPv4 is preferred."
 fi
}

Ubuntu_IPv6() {
 yamlName=$(find /etc/netplan/ -iname "*.yaml")
 iName=$(ip add | grep "^2: " | awk -F'[ :]' '{print $3}')
 dhclient -6 $iName
 MAC=$(ip add | grep "link/ether.*brd" | awk -F' ' '{print $2}')
 IPv6=$(ip add | grep "inet6.*global" | awk -F' ' '{print $2}')
 if [[ ${#IPv6} -lt 5 ]]; then echo "Can't IPv6"; exit 1; fi
 cp $yamlName /root/
 cat <<0099 >$yamlName
network:
   ethernets:
       ens3:
           dhcp4: true
           dhcp6: false
           match:
               macaddress: $MAC
           addresses:
             - $IPv6
           set-name: $iName
   version: 2
0099
 netplan apply
 sleep 10s #等待10秒，确保IPv6已启用
 ip -6 route add default dev $iName #添加IPv6路由，优先使用IPv6连接
 ping -c 5 ipv6.google.com #ping 5次，自动停止ping
 pkill ping #停止正在执行的ping进程
 if [[ $(curl -sS -6 ifconfig.co) =~ ":" ]]; then
   echo "IPv6 is preferred."
 else
   echo "IPv4 is preferred."
 fi
}

myOS=$(hostnamectl | sed -n 's_.*System: \(\S*\).*_\1_p')
#Ubuntu, Debian
if [[ "$myOS" =~ "Ubuntu" ]]; then
 echo "Ubuntu"
 Ubuntu_IPv6
elif [[ "$myOS" =~ "Debian" ]]; then
 echo "Debian"
 Debian_IPv6
fi