一、什么是nginx
Nginx ("engine x") 是一个高性能的HTTP和反向代理服务器，也是一个IMAP/POP3/SMTP服务器。
二、优点
占有内存少，并发能力强
三、如何用
nginx安装教程：http://www.runoob.com/linux/nginx-install-setup.html
安装过程中肯能遇到的问题：
1）[error] open() ＂/usr/local/nginx/logs/nginx.pid＂
解决方法：[root@localhost nginx]# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
2）invalid PID number ""
解决方法：将nginx/conf/nginx.conf配置中的pid /home/djy/public/nginx/nginx/nginx.pid;这一行注释了
3）有时候进程会被占用
查看进程：
ps -ef | grep nginx
杀掉进程：
1、删除对应的程序进程即可
kill -9 1116
2、如果确认就只有nginx占用，也可以直接结束nginx的所有进程
killall -9 nginx
nginx.conf参考：
1 user 用户名 所属的分组; 2 worker_processes 2; #设置值和CPU核心数一致 3 error_log /home/djy/public/nginx/nginx/logs/nginx_error.log crit; #日志位置和日志级别 4 5 #Specifies the value for maximum file descriptors that can be opened by this process. 6 worker_rlimit_nofile 65535; 7 events 8 { 9 use epoll; 10 worker_connections 65535; 11 } 12 http 13 { 14 include mime.types; 15 default_type application/octet-stream; 16 log_format main '$remote_addr - $remote_user [$time_local] "$request" ' 17 '$status $body_bytes_sent "$http_referer" ' 18 '"$http_user_agent" $http_x_forwarded_for'; 19 20 #charset gb2312; 21 22 server_names_hash_bucket_size 128; 23 client_header_buffer_size 32k; 24 large_client_header_buffers 4 32k; 25 client_max_body_size 8m; 26 27 sendfile on; 28 tcp_nopush on; 29 keepalive_timeout 60; 30 tcp_nodelay on; 31 fastcgi_connect_timeout 300; 32 fastcgi_send_timeout 300; 33 fastcgi_read_timeout 300; 34 fastcgi_buffer_size 64k; 35 fastcgi_buffers 4 64k; 36 fastcgi_busy_buffers_size 128k; 37 fastcgi_temp_file_write_size 128k; 38 gzip on; 39 gzip_min_length 1k; 40 gzip_buffers 4 16k; 41 gzip_http_version 1.0; 42 gzip_comp_level 2; 43 gzip_types text/plain application/x-javascript text/css application/xml; 44 gzip_vary on; 45 46 #limit_zone crawler $binary_remote_addr 10m; 47 #下面是server虚拟主机的配置 48 server { 49 listen 80; 50 server_name localhost; 51 52 location /resource_static/ { 53 add_header 'Access-Control-Allow-Origin' '*'; 54 add_header 'Access-Control-Allow-Credentials' 'true'; 55 add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; 56 add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; 57 root /home/djy/; 58 } 59 60 } 61 62 }
以上配置完成后，以下两个命令要配合使用才能正常访问：
/home/djy/public/nginx/nginx/sbin/nginx -s reload # 重新载入配置文件
/home/djy/public/nginx/nginx/sbin/nginx -s reopen # 重启 Nginx
四、uploadFile+nginx实现上传图片（Windows/Linux均可用）
参考地址：http://blog.csdn.net/u010191243/article/details/50596793