---------Installation
First install dependencies
yum -y install openssl openssl-devel
yum -y install pcre-devel
Download nginx
wget http://nginx.org/download/nginx-1.10. 0.tar.gz
Installation
Unzip first
tar -zxvf nginx-1.10.0.tar.gz
Then compile
cd nginx-1.10.0
./configure --prefix=/usr/local/nginx
make
make install
Start
/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
Stop
Check the process number first
ps -ef |grep nginx
root 12901 1 0 11: 26? 00:00:00 nginx: master proces ./nginx
nobody 12902 12901 0 11:26? 00:00 nginx: worker process
Stop calmly: Kill -S Quit 12901
Quick stop: kill - s TERM 12901/ kill -s INT 12901
Force stop: killall nginx
Restart
Verify whether the configuration file is correct,
Method 1: You must enter /usr/local/nginx/sbin/ to execute./nginx -t
Method 2: / usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf
Start restart
Method 1: You must enter /usr/local/nginx/sbin/ to execute ./nginx -s reload
Method 2: kill -HUP master title
Build nginx+tomcat environment
Add the following configuration in the nginx configuration file (simple example)
nginx is installed in the directory: /usr/local/nginx/
user nobody;
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
charset UTF-8;
sendfile on ;
access_log off;
error_log logs/host.error .log crit;
keepalive_timeout 65;
gzip on;
gzip_min_length 1000;
gzip_comp_level 4;
gzip_types text/plain text/css text/xml application/json application/x-javascript;
open_file_c ache max=655350 inactive=20s;
open_file_cache_valid 30s;
open_file_cache_min_uses 2;
#Stop flag, will not be accessed
#server 192.168.239.134:8080 down;
#Backup machine, all non-backup machines will be enabled after they hang up
#server 192.168.239.134: 8080 backup;
upstream tomcats {
fair;
server 192.168.239.134:8080 backup;
server 192.168.239.135:8080 weight=5;
server 192.168.239.136:8080 weight=2 max_fails=2 fail_timeout=60s;
}
Server {st Listen 80;
Server_name 192.168.239.135;
Access_log Logs /Host.Access.Log Combined;
local ife/data0/www; #tomcat's The deployment path was changed by me
index index.jsp index.jspx index.do;
##proxy_pass http://192.168.239.134:8080; #Tomcat service address
proxy_pass http://tomcats;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
---------Load balancing strategy
1, none Polling method (one at a time round), the default is
2. You can change the polling by weight (default is 1). The higher the weight value, the more requests are allocated
3. ip_hash performs hash operation according to the user's ip address to obtain the hash value, bind On a certain server, 续 The IP of the subsequent users will be locked on a certain server. At this time, the weight will fail.
4 and FAIR are third -party. According to their own algorithms, the load of the server is obtained.
5. url_hash third-party, performs hash operation based on the requested URL to bind the server
Install the third-party module
1. Download gnosek-nginx-upstream-fair-a18b409.tar.gz
2. Unzip tar -zxvf gnosek -nginx-upstream-fair-a18b409.tar.gz
3. Configure, enter the nginx decompression directory
./configure --prefix=/usr/local/nginx --add-module=/picclife/soft/nginx-upstream -fair
4. Compile, do not install, because we installed nginx before
make
5. Enter the objs directory
[root@zhanglw-5 objs]# ls
addon autoconf.err Makefile nginx nginx.8 ngx_auto_config.h ngx_auto_headers. h ngx_modules.c ngx_modules.o src
6. Replace nginx. Previously, our nginx was installed in the /usr/local/nginx directory
cp nginx /usr/local/nginx/sbin/
Stop nginx before replacing. Otherwise it cannot be replaced
The above has introduced the installation of nginx on Linux, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.


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