How to install v2rayA client for ubuntu 18.04
refer to "How to install v2rayA for ubuntu.md"
ref:
https://v2xtls.org/v2ray-linux%E5%AE%A2%E6%88%B7%E7%AB%AFv2raya%E4%B8%8B%E8%BD%BD%E5%AE%89%E8%A3%85%E5%8F%8A%E4%BD%BF%E7%94%A8%E6%95%99%E7%A8%8B-%E6%94%AF%E6%8C%81vmess-vless-ss-ssr-trojan-pingtunnel/