How to install nginx in centos

CentOS Installing Nginx requires following the following steps: Installing dependencies such as development tools, pcre-devel, and openssl-devel. Download the Nginx source code package, unzip it and compile and install it, and specify the installation path to /usr/local/nginx. Create Nginx users and user groups and set permissions. Modify the configuration file nginx.conf and configure the listening port and domain name/IP address. Start the Nginx service. Common errors need to be paid attention to, such as dependency issues, port conflicts, and configuration file errors. Performance optimization needs to be adjusted according to specific circumstances, such as turning on cache and adjusting the number of worker processes.

How to install Nginx in CentOS? Don't be fooled by those tutorials!

Many tutorials tell you to solve the Nginx installation on CentOS with a few simple commands, but this often ignores potential problems and better solutions. In fact, this thing is not that simple, and there are a lot of tricks inside. Let’s talk about it. Not only will you teach you how to pretend, but you will also understand why you pretend like this and how to avoid those crazy mistakes.

First of all, you have to understand that Nginx is not just a web server, it is a high-performance web server, and there are many things you can do. You have to figure out what you need, is it a simple static file server, or does it need to support dynamic languages ​​such as PHP and Python? This directly affects your installation steps.

Many tutorials directly tell you that using yum install nginx is done. This is indeed convenient, but the problem is that the Nginx version in yum 's source may be older, and may not be as safe and performance as the latest version. Therefore, I recommend you to compile and install it from the source code. Although this is a little troublesome, it will give you a deeper understanding of Nginx and better control of the installation process.

Lay the foundation first:

You need to make sure your CentOS system has been updated to the latest version and execute yum update . This can avoid many dependency problems. Then, you need to install some necessary development tools, such as gcc , make , pcre-devel , openssl-devel , etc. These tools are essential for compiling Nginx. The specific commands are:

 <code class="bash">yum groupinstall "Development Tools" yum install pcre-devel openssl-devel</code>

Core part: Compile and install Nginx

Download the source code package of Nginx, and you can download the latest stable version from the official website. After decompression, enter the decompression directory and execute the following command:

 <code class="bash">./configure --prefix=/usr/local/nginx --with-http_ssl_module --with-http_gzip_static_module make make install</code>

Here I used the --prefix parameter to specify the installation path to avoid conflicts with the packages that come with the system. --with-http_ssl_module and --with-http_gzip_static_module enable SSL and gzip compression modules respectively, which is very important for improving website performance. Remember, you can add more modules according to your actual needs.

The compilation process may be longer, so wait patiently. After compiling, you need to create Nginx users and user groups and set permissions:

 <code class="bash">groupadd -r nginx useradd -r -g nginx -s /sbin/nologin nginx chown -R nginx:nginx /usr/local/nginx</code>

Configure Nginx

The configuration file is usually located in /usr/local/nginx/conf/nginx.conf . This file is very important and you need to modify it according to your needs. At the very least, you need to modify listen and server_name instructions in server block. The listen directive specifies the port to listen, usually port 80; server_name directive specifies your domain name or IP address.

Start, stop and restart Nginx

After the installation is complete, you can start, stop and restart Nginx with the following commands:

 <code class="bash">/usr/local/nginx/sbin/nginx -s start #启动/usr/local/nginx/sbin/nginx -s stop #停止/usr/local/nginx/sbin/nginx -s reload #重启</code>

FAQs and pitfalls:

• Dependency problem: If there is a dependency problem during compilation, you need to install the corresponding dependency package. If you look carefully at the error message, you will find the missing dependencies.
• Port conflict: Ensure that port 80 is not occupied by other programs. If occupied, you need to modify the Nginx listening port, or close the program that occupies port 80.
• Configuration file error: Configuration file error is a common reason why Nginx cannot start. Double-check the configuration file to make sure the syntax is correct and the configuration items meet your needs.

Performance optimization:

There is too much content in this aspect, such as turning on cache, using the appropriate number of worker processes, adjusting keepalive parameters, etc., all of which need to be adjusted according to your actual situation. Remember, performance optimization is an ongoing process that requires constant testing and adjustment.

In short, installing Nginx is not just a few simple commands. You need to understand how it works and configure and optimize according to your actual needs. This article is just an introduction, and you need to explore deeper knowledge yourself. Remember, practice brings true knowledge! Only by doing more and trying more can you become a true Nginx master.

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