'winrar' is not recognized as an internal or external command, operable program or batch fil

'winrar' is not recognized as an internal or external command,
operable program or batch file.

默认安装完winrar后，命令行是不支持winrar命令的，会报以上错误。

解决办法：需要设置环境变量，path 值为 winrar的安装路径。

如果path里面设置过其他的环境变量，值里面各路径需要用分号隔开。