## server_name 语法: ``` server_name name1 name2 name3 ...; ``` 示例1: ``` server_name www.baidu.com //精确匹配 ``` 示例2: ``` server_name *.baidu.com; //通配 ``` 示例3: ``` server_name www.baidu.com *baidu.com; ``` ## 四种写法 ``` server_name www.baidu.com; server_name *.baidu.com; server_name www.baidu.*; server_name ~^www\.baidu\.*$; ```