Linux文件编码问题

Linux修改文件报错

今天修改nginx的配置文件时：

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    lua_package_path "/usr/local/openresty/lualib/?.lua;;";  
    lua_package_cpath "/usr/local/openresty/lualib/?.so;;"; 
    lua_shared_dict item_cache 150m;
    
    #tomcat server
    upstream tomcat-cluster {
        hash $request_uri;
        server 192.168.131.1:8081;
    }

    server {
        listen       8081;
        server_name  localhost;

	location /item {
            proxy_pass http://tomcat-cluster;
        }


        location ~ /api/item/(\d+) {
	    default_type application/json;
            content_by_lua_file lua/item.lua;
        }

        location / {
            root   html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}

报错：

nginx: [emerg] unknown directive "default_type application/json" in /usr/local/openresty/nginx/conf/nginx.conf:34

用idea打开发现文件乱码，解决方法：

   1.改成UTF-8编码

   2.用高级代码编辑器打开文档，如idea，vscode等