1.1. help命令
a. 帮助查看其他命令的使用方法，类型linux下man
b. 示例： help help
x210 # help help help [command ...] - show help information (for 'command') 'help' prints online help for the monitor commands. Without arguments, it prints a short usage message for all commands. To get detailed help information for specific commands you can type 'help' with one or more command names as arguments. x210 #