Shell特殊变量:Shell $0, $#, $*, $@, $?, $$和命令行参数
https://www.cnblogs.com/davygeek/p/5670212.html
用shell脚本监控进程是否存在 不存在则启动的实例
https://www.cnblogs.com/zdz8207/p/3282352.html
Linux下的SecureCRT/XShell替代工具
https://www.jianshu.com/p/8fd4994eec8c
https://www.cnblogs.com/davygeek/p/5670212.html
https://www.cnblogs.com/zdz8207/p/3282352.html
https://www.jianshu.com/p/8fd4994eec8c