Oracle的e2.1.micro免费实例安装tailscale后，设置为出口节点（Exit Node）

ubuntu@:~$ echo 'net.ipv4.ip_forward = 1' | sudo tee /etc/sysctl.d/99-tailscale.conf
net.ipv4.ip_forward = 1
ubuntu@:~$
echo 'net.ipv6.conf.all.forwarding = 1' | sudo tee -a /etc/sysctl.d/99-tailscale.conf
net.ipv6.conf.all.forwarding = 1
ubuntu@:~$ sudo sysctl -p /etc/sysctl.d/99-tailscale.conf
net.ipv4.ip_forward = 1
net.ipv6.conf.all.forwarding = 1
ubuntu@:~$ sudo tailscale set --advertise-exit-node
ubuntu@:~$

• /etc/sysctl.d/99-tailscale.conf 是独立配置文件
• 它不会污染 /etc/sysctl.conf，而是新建一个专门给 Tailscale 用的配置文件：
• 以后你一看文件名就知道这是给 Tailscale 出口节点用的。