CentOS+Nginx+PHP+MySql pvufweb 服务器安装配置
2010年1月19日星期二 | | |1、安装依赖
sudo -s
LANG=C
yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers libtool-ltdl libtool-ltdl-devel libmcrypt libmcrypt-devel
2、下载安装包
cd ~
mkdir software
cd software
wget http://sysoev.ru/nginx/nginx-0.8.15.tar.gz
wget http://www.php.net/get/php-5.2.10.tar.gz/from/this/mirror
wget http://blog.s135.com/soft/linux/nginx_php/phpfpm/php-5.2.10-fpm-0.5.11.diff.gz
wget http://dev.mysql.com/get/Downloads/MySQL-5.1/mysql-5.1.38.tar.gz/from/http://mysql.he.net/
wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.13.tar.gz
wget "http://downloads.sourceforge.net/mcrypt/libmcrypt-2.5.8.tar.gz?modtime=1171868460&big_mirror=0″
wget "http://downloads.sourceforge.net/mcrypt/mcrypt-2.6.8.tar.gz?modtime=1194463373&big_mirror=0″
wget http://pecl.php.net/get/memcache-2.2.5.tgz
wget "http://downloads.sourceforge.net/mhash/mhash-0.9.9.9.tar.gz?modtime=1175740843&big_mirror=0″
wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-7.9.tar.gz
wget http://bart.eaccelerator.net/source/0.9.5.3/eaccelerator-0.9.5.3.tar.bz2
wget http://pecl.php.net/get/PDO_MYSQL-1.0.2.tgz
wget http://blog.s135.com/soft/linux/nginx_php/imagick/ImageMagick.tar.gz
wget http://pecl.php.net/get/imagick-2.2.2.tgz
3、安装PHP 5.2.10(FastCGI模式)
tar zxvf libiconv-1.13.tar.gz
cd libiconv-1.13/
./configure –prefix=/usr/local
make
make install
cd ../tar zxvf libmcrypt-2.5.8.tar.gz
cd libmcrypt-2.5.8/
./configure
make
make install
/sbin/ldconfig
cd libltdl/
./configure –enable-ltdl-install
make
make install
cd ../../tar zxvf mhash-0.9.9.9.tar.gz
cd mhash-0.9.9.9/
./configure
make
make install
cd ../ln -s /usr/local/lib/libmcrypt.la /usr/lib/libmcrypt.la
ln -s /usr/local/lib/libmcrypt.so /usr/lib/libmcrypt.so
ln -s /usr/local/lib/libmcrypt.so.4 /usr/lib/libmcrypt.so.4
ln -s /usr/local/lib/libmcrypt.so.4.4.8 /usr/lib/libmcrypt.so.4.4.8
ln -s /usr/local/lib/libmhash.a /usr/lib/libmhash.a
ln -s /usr/local/lib/libmhash.la /usr/lib/libmhash.la
ln -s /usr/local/lib/libmhash.so /usr/lib/libmhash.so
ln -s /usr/local/lib/libmhash.so.2 /usr/lib/libmhash.so.2
ln -s /usr/local/lib/libmhash.so.2.0.1 /usr/lib/libmhash.so.2.0.1
ln -sf /usr/lib64/libltdl.a /usr/local/lib/libltdl.a
ln -s /usr/local/bin/libmcrypt-config /usr/bin/libmcrypt-configtar zxvf mcrypt-2.6.8.tar.gz
cd mcrypt-2.6.8/
/sbin/ldconfig
./configure
make
make install
cd ../
4、安装MySql
/usr/sbin/groupadd mysql
/usr/sbin/useradd -g mysql mysql
tar zxvf mysql-5.1.38.tar.gz
cd mysql-5.1.38/
./configure –prefix=/fse/server/mysql/ –enable-assembler –with-extra-charsets=complex –enable-thread-safe-client –with-big-tables –with-readline –with-ssl –with-embedded-server –enable-local-infile –with-plugins=innobase
make && make install
chmod +w /fse/server/mysql
chown -R mysql:mysql /fse/server/mysql
cd ../#创建MySql数据存放目录
mkdir -p /fse/data/db/
chown -R mysql:mysql /fse/data/#以mysql用户帐号的身份建立数据表
/fse/server/mysql/bin/mysql_install_db –basedir=/fse/server/mysql –datadir=/fse/data/db –user=mysql#创建my.cnf文件
vi /fse/data/my.cnf#将下面的内容复制到my.cnf
[client]
default-character-set = utf8
port = 3306
socket = /tmp/mysql.sock[mysql]
prompt="[\d]> "
no-auto-rehash[mysqld]
#default-character-set = utf8
user = mysql
port = 3306
socket = /tmp/mysql.sock
basedir = /fse/server/mysql
datadir = /fse/data/db
open_files_limit = 10240
back_log = 600
max_connections = 3000
max_connect_errors = 6000
table_cache = 614
external-locking = FALSE
max_allowed_packet = 32M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 300
thread_concurrency = 8
query_cache_size = 32M
query_cache_limit = 2M
query_cache_min_res_unit = 2k
default-storage-engine = MyISAM
default_table_type = MyISAM
thread_stack = 192K
transaction_isolation = READ-COMMITTED
tmp_table_size = 246M
max_heap_table_size = 246M
long_query_time = 1
log_long_format
log-bin = /fse/data/binlog
binlog_cache_size = 4M
binlog_format = MIXED
max_binlog_cache_size = 8M
max_binlog_size = 512M
expire_logs_days = 7
key_buffer_size = 256M
read_buffer_size = 1M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 64M
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_max_extra_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recoverskip-name-resolve
master-connect-retry = 10
slave-skip-errors = 1032,1062,126,1114,1146,1048,1396server-id = 1
innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 2048M
innodb_data_file_path = ibdata1:1024M:autoextend
innodb_file_io_threads = 4
innodb_thread_concurrency = 8
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 16M
innodb_log_file_size = 128M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
innodb_file_per_table = 0
[mysqldump]
quick
max_allowed_packet = 32M
#创建管理脚本
vi /fse/data/mysql#输入以下内容
#!/bin/shmysql_port=3306
mysql_username="root"
mysql_password="123456″function_start_mysql()
{
printf "Starting MySQL…\n"
/bin/sh /fse/server/mysql/bin/mysqld_safe –defaults-file=/fse/data/my.cnf 2>&1 > /dev/null &
}function_stop_mysql()
{
printf "Stoping MySQL…\n"
/fse/server/mysql/bin/mysqladmin -u ${mysql_username} -p${mysql_password} -S /tmp/mysql.sock shutdown
}function_restart_mysql()
{
printf "Restarting MySQL…\n"
function_stop_mysql
sleep 5
function_start_mysql
}function_kill_mysql()
{
kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')
kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')
}if [ "$1" = "start" ]; then
function_start_mysql
elif [ "$1" = "stop" ]; then
function_stop_mysql
elif [ "$1" = "restart" ]; then
function_restart_mysql
elif [ "$1" = "kill" ]; then
function_kill_mysql
else
printf "Usage: /fse/data/mysql {start|stop|restart|kill}\n"
fi#赋予脚本执行权限
chmod +x /fse/data/mysql
#启动mysql
/fse/data/mysql start#登录MySql
/fse/server/mysql/bin/mysql -u root -p -S /tmp/mysql.sock#修改
GRANT ALL PRIVILEGES ON *.* TO 'admin'@'localhost' IDENTIFIED BY '12345678′;
GRANT ALL PRIVILEGES ON *.* TO 'admin'@'127.0.0.1′ IDENTIFIED BY '12345678′;
5、编译安装PHP(FastCGI模式)
tar zxvf php-5.2.10.tar.gz
gzip -cd php-5.2.10-fpm-0.5.11.diff.gz | patch -d php-5.2.10 -p1
cd php-5.2.10/
./configure –prefix=/fse/server/php –with-config-file-path=/fse/server/php/etc –with-mysql=/fse/server/mysql –with-mysqli=/fse/server/mysql/bin/mysql_config –with-iconv-dir=/usr/local –with-freetype-dir –with-jpeg-dir –with-png-dir –with-zlib –with-libxml-dir=/usr –enable-xml –disable-rpath –enable-discard-path –enable-safe-mode –enable-bcmath –enable-shmop –enable-sysvsem –enable-inline-optimization –with-curl –with-curlwrappers –enable-mbregex –enable-fastcgi –enable-fpm –enable-force-cgi-redirect –enable-mbstring –with-mcrypt –with-gd –enable-gd-native-ttf –with-openssl –with-mhash –enable-pcntl –enable-sockets –with-ldap –with-ldap-sasl –with-xmlrpc –enable-zip –enable-soap –without-pear
make ZEND_EXTRA_LIBS='-liconv'
make install
cp php.ini-dist /fse/server/php/etc/php.ini
cd ../
curl http://pear.php.net/go-pear | /fse/server/php/bin/php
6、编译安装PHP5扩展模块
tar zxvf memcache-2.2.5.tgz
cd memcache-2.2.5/
/fse/server/php/bin/phpize
./configure –with-php-config=/fse/server/php/bin/php-config
make
make install
cd ../tar jxvf eaccelerator-0.9.5.3.tar.bz2
cd eaccelerator-0.9.5.3/
/fse/server/php/bin/phpize
./configure –enable-eaccelerator=shared –with-php-config=/fse/server/php/bin/php-config
make
make install
cd ../tar zxvf PDO_MYSQL-1.0.2.tgz
cd PDO_MYSQL-1.0.2/
/fse/server/php/bin/phpize
./configure –with-php-config=/fse/server/php/bin/php-config –with-pdo-mysql=/fse/server/mysql
make
make install
cd ../tar zxvf ImageMagick.tar.gz
cd ImageMagick-6.5.1-2/
./configure
make
make install
cd ../tar zxvf imagick-2.2.2.tgz
cd imagick-2.2.2/
/fse/server/php/bin/phpize
./configure –with-php-config=/fse/server/php/bin/php-config
make
make install
cd ../
7、修改php.ini
sed -i 's#extension_dir = "./"#extension_dir = "/fse/server/php/lib/php/extensions/no-debug-non-zts-20060613/"\nextension = "memcache.so"\nextension = "pdo_mysql.so"\nextension = "imagick.so"\n#' /fse/server/php/etc/php.ini
sed -i 's#output_buffering = Off#output_buffering = On#' /fse/server/php/etc/php.ini
sed -i "s#; always_populate_raw_post_data = On#always_populate_raw_post_data = On#g" /fse/server/php/etc/php.ini
8、配置eAccelerator加速PHP
mkdir -p /fse/server/eaccelerator_cache
vi /fse/server/php/etc/php.ini#在php.ini 末尾(shift+g)追加以下内容
[eaccelerator]
zend_extension="/fse/server/php/lib/php/extensions/no-debug-non-zts-20060613/eaccelerator.so"
eaccelerator.shm_size="64″
eaccelerator.cache_dir="/fse/server/eaccelerator_cache"
eaccelerator.enable="1″
eaccelerator.optimizer="1″
eaccelerator.check_mtime="1″
eaccelerator.debug="0″
eaccelerator.filter=""
eaccelerator.shm_max="0″
eaccelerator.shm_ttl="3600″
eaccelerator.shm_prune_period="3600″
eaccelerator.shm_only="0″
eaccelerator.compress="1″
eaccelerator.compress_level="9″
9、创建www用户和组、虚拟主机目录
/usr/sbin/groupadd www
/usr/sbin/useradd -g www www
mkdir -p /fse/www
chmod +w /fse/www
chown -R www:www /fse/www
10、创建php-fpm配置文件 [php-fpm是为PHP的一个FastCGI管理补丁,可以平滑变更php.ini配置而无需重启php-cgi]
#在/fse/server/php/etc/目录中创建php-fpm.conf文件
rm -f /fse/server/php/etc/php-fpm.conf
vi /fse/server/php/etc/php-fpm.conf#输入以下内容
<?xml version="1.0″ ?>
<configuration>All relative paths in this config are relative to php's install prefix
<section name="global_options">
Pid file
<value name="pid_file">/fse/server/php/logs/php-fpm.pid</value>Error log file
<value name="error_log">/fse/server/php/logs/php-fpm.log</value>Log level
<value name="log_level">notice</value>When this amount of php processes exited with SIGSEGV or SIGBUS …
<value name="emergency_restart_threshold">10</value>… in a less than this interval of time, a graceful restart will be initiated.
Useful to work around accidental curruptions in accelerator's shared memory.
<value name="emergency_restart_interval">1m</value>Time limit on waiting child's reaction on signals from master
<value name="process_control_timeout">5s</value>Set to 'no' to debug fpm
<value name="daemonize">yes</value></section>
<workers>
<section name="pool">
Name of pool. Used in logs and stats.
<value name="name">default</value>Address to accept fastcgi requests on.
Valid syntax is 'ip.ad.re.ss:port' or just 'port' or '/path/to/unix/socket'
<value name="listen_address">127.0.0.1:9000</value><value name="listen_options">
Set listen(2) backlog
<value name="backlog">-1</value>Set permissions for unix socket, if one used.
In Linux read/write permissions must be set in order to allow connections from web server.
Many BSD-derrived systems allow connections regardless of permissions.
<value name="owner"></value>
<value name="group"></value>
<value name="mode">0666</value>
</value>Additional php.ini defines, specific to this pool of workers.
<value name="php_defines">
<value name="sendmail_path">/usr/sbin/sendmail -t -i</value>
<value name="display_errors">1</value>
</value>Unix user of processes
<value name="user">www</value>Unix group of processes
<value name="group">www</value>Process manager settings
<value name="pm">Sets style of controling worker process count.
Valid values are 'static' and 'apache-like'
<value name="style">static</value>Sets the limit on the number of simultaneous requests that will be served.
Equivalent to Apache MaxClients directive.
Equivalent to PHP_FCGI_CHILDREN environment in original php.fcgi
Used with any pm_style.
<value name="max_children">128</value>Settings group for 'apache-like' pm style
<value name="apache_like">Sets the number of server processes created on startup.
Used only when 'apache-like' pm_style is selected
<value name="StartServers">20</value>Sets the desired minimum number of idle server processes.
Used only when 'apache-like' pm_style is selected
<value name="MinSpareServers">5</value>Sets the desired maximum number of idle server processes.
Used only when 'apache-like' pm_style is selected
<value name="MaxSpareServers">35</value></value>
</value>
The timeout (in seconds) for serving a single request after which the worker process will be terminated
Should be used when 'max_execution_time' ini option does not stop script execution for some reason
'0s' means 'off'
<value name="request_terminate_timeout">0s</value>The timeout (in seconds) for serving of single request after which a php backtrace will be dumped to slow.log file
'0s' means 'off'
<value name="request_slowlog_timeout">0s</value>The log file for slow requests
<value name="slowlog">logs/slow.log</value>Set open file desc rlimit
<value name="rlimit_files">65535</value>Set max core size rlimit
<value name="rlimit_core">0</value>Chroot to this directory at the start, absolute path
<value name="chroot"></value>Chdir to this directory at the start, absolute path
<value name="chdir"></value>Redirect workers' stdout and stderr into main error log.
If not set, they will be redirected to /dev/null, according to FastCGI specs
<value name="catch_workers_output">yes</value>How much requests each process should execute before respawn.
Useful to work around memory leaks in 3rd party libraries.
For endless request processing please specify 0
Equivalent to PHP_FCGI_MAX_REQUESTS
<value name="max_requests">102400</value>Comma separated list of ipv4 addresses of FastCGI clients that allowed to connect.
Equivalent to FCGI_WEB_SERVER_ADDRS environment in original php.fcgi (5.2.2+)
Makes sense only with AF_INET listening socket.
<value name="allowed_clients">127.0.0.1</value>Pass environment variables like LD_LIBRARY_PATH
All $VARIABLEs are taken from current environment
<value name="environment">
<value name="HOSTNAME">$HOSTNAME</value>
<value name="PATH">/usr/local/bin:/usr/bin:/bin</value>
<value name="TMP">/tmp</value>
<value name="TMPDIR">/tmp</value>
<value name="TEMP">/tmp</value>
<value name="OSTYPE">$OSTYPE</value>
<value name="MACHTYPE">$MACHTYPE</value>
<value name="MALLOC_CHECK_">2</value>
</value></section>
</workers>
</configuration>
11、启动php-cgi进程,监听127.0.0.1的9000端口,进程数为200(如果服务器内存小于3GB,可以只开启64个进程),用户为www:
ulimit -SHn 65535
/fse/server/php/sbin/php-fpm start#注:php-fpm还有其他参数,包括:start|stop|quit|restart|reload|logrotate,修改php.ini后不重启php-cgi,重新加载配置文件使用reload
12、安装Nginx
#安装Nginx所需的pcre库
tar zxvf pcre-7.9.tar.gz
cd pcre-7.9/
./configure
make && make install
cd ../#安装Nginx
tar zxvf nginx-0.8.15.tar.gz
cd nginx-0.8.15/
./configure –user=www –group=www –prefix=/fse/server/nginx –with-http_stub_status_module –with-http_ssl_module
make && make install
cd ../#创建Nginx日志目录
mkdir -p /fse/logs
chmod +w /fse/logs
chown -R www:www /fse/logs#创建Nginx配置文件
rm -f /fse/server/nginx/conf/nginx.conf
vi /fse/server/nginx/conf/nginx.conf#nginx.conf中输入以下内容
user www www;worker_processes 8;
error_log /fse/logs/nginx_error.log crit;
pid /fse/server/nginx/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 65535;events
{
use epoll;
worker_connections 65535;
}http
{
include mime.types;
default_type application/octet-stream;#charset gb2312;
server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 8m;
sendfile on;
tcp_nopush on;keepalive_timeout 60;
tcp_nodelay on;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 64k;
fastcgi_buffers 4 64k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 128k;gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;#limit_zone crawler $binary_remote_addr 10m;
server
{
listen 80;
server_name localhost;
index index.html index.htm index.php;
root /fse/www;location ~ .*\.(php|php5)?$
{
#fastcgi_pass unix:/tmp/php-cgi.sock;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fcgi.conf;
}log_format wwwlogs '$remote_addr – $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" $http_x_forwarded_for';
access_log /fse/logs/wwwlogs.log wwwlogs;
}}
#在/fse/server/nginx/conf/目录中创建fcgi.conf文件
vi /fse/server/nginx/conf/fcgi.conf#在fcgi.conf中输入以下内容
fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;# PHP only, required if PHP was built with –enable-force-cgi-redirect
fastcgi_param REDIRECT_STATUS 200;
13、启动Nginx
ulimit -SHn 65535
/fse/server/nginx/sbin/nginx
14、配置开机自动启动Nginx + PHP
vi /etc/rc.local
#在末尾增加以下内容
ulimit -SHn 65535
/fse/server/php/sbin/php-fpm start
/fse/server/nginx/sbin/nginx
15、优化Linux内核参数
vi /etc/sysctl.conf
#在末尾追加以下内容
# Add
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog = 32768
net.core.somaxconn = 32768net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2net.ipv4.tcp_tw_recycle = 1
#net.ipv4.tcp_tw_len = 1
net.ipv4.tcp_tw_reuse = 1net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800#net.ipv4.tcp_fin_timeout = 30
#net.ipv4.tcp_keepalive_time = 120
net.ipv4.ip_local_port_range = 1024 65535#让配置立即生效
/sbin/sysctl -p
16、在不停止Nginx服务的情况下平滑变更Nginx配置
#修改/fse/server/nginx/conf/nginx.conf配置文件后,请执行以下命令检查配置文件是否正确
/usr/local/webserver/nginx/sbin/nginx -t如果屏幕显示以下两行信息,说明配置文件正确:
the configuration file /fse/server/nginx/conf/nginx.conf syntax is ok
the configuration file /fse/server/nginx/conf/nginx.conf was tested successfully这时,输入以下命令查看Nginx主进程号
ps -ef | grep "nginx: master process" | grep -v "grep" | awk -F ' ' '{print $2}'屏幕显示的即为Nginx主进程号,例如:
6302
这时,执行以下命令即可使修改过的Nginx配置文件生效:kill -HUP 6302
或者无需这么麻烦,找到Nginx的Pid文件:
kill -HUP `cat /usr/local/webserver/nginx/nginx.pid`
17、编写每天定时切割Nginx日志的脚本
#创建脚本/fse/server/nginx/sbin/cut_nginx_log.sh
vi /fse/server/nginx/sbin/cut_nginx_log.sh#输入以下内容
#!/bin/bash
# This script run at 00:00# The Nginx logs path
logs_path="/fse/server/nginx/logs/"mkdir -p ${logs_path}$(date -d "yesterday" +"%Y")/$(date -d "yesterday" +"%m")/
mv ${logs_path}access.log ${logs_path}$(date -d "yesterday" +"%Y")/$(date -d "yesterday" +"%m")/access_$(date -d "yesterday" +"%Y%m%d").log
kill -USR1 `cat /fse/server/nginx/nginx.pid`#设置crontab,每天凌晨00:00切割nginx访问日志
crontab -e
00 00 * * * /bin/bash /fse/server/nginx/sbin/cut_nginx_log.sh
嗯嗯,通过以上步骤服务器基本就搞定了,有没有出现不能访问的情况呢?如果是,那请检查一下防火墙是否开启… 如开启了防火墙执行一下命令就可以了:
iptables -I INPUT -p tcp –dport 80 -j ACCEPT