Write an error-checking shell script (编写自动检测脚本)

[Hephaest]

The SSR server needs regular maintenance and error troubleshooting.
Despite this part can be done by manual checking, an automation shell script is always a better way.

SSR 服务器不是搭建完就完事了，需要定期维护和错误排查。
这个过程可以手动实现也可以通过执行定时脚本实现。