Installing Nginx on CentOS 6, Compiling and Installing Nginx on Linux

Preface

Recently I deployed a django project to a new server, and this server was given a CentOS 6 system. The official repos are very old, and the yum manager was broken by ops, so I couldn't load the EPEL repo. If I wanted to use nginx I could only compile and install it myself~

Download nginx source

First, download the installation files from Nginx's official website. Link: http://nginx.org/ The version I used is: nginx-1.12.1.tar.gz

Install the environment required for compilation

Install gcc

Installing nginx requires first compiling the source code downloaded from the official website. Compilation depends on a gcc environment. If there is no gcc environment, you need to install it:

yum install gcc-c++

Install PCRE pcre-devel

PCRE (Perl Compatible Regular Expressions) is a Perl library that includes a Perl-compatible regular expression library. Nginx's http module uses pcre to parse regular expressions, so you need to install the pcre library on Linux. pcre-devel is a secondary development library for developing with pcre. Nginx also needs this library. Command:

yum install -y pcre pcre-devel

Install zlib

The zlib library provides many compression and decompression methods. Nginx uses zlib to gzip the contents of http packets, so you need to install the zlib library on CentOS.

yum install -y zlib zlib-devel

Install OpenSSL

OpenSSL is a powerful Secure Sockets Layer cryptographic library, covering major cryptographic algorithms, commonly used key and certificate encapsulation management functions, and the SSL protocol, and providing a rich set of applications for testing or other purposes. Nginx not only supports the http protocol, but also supports https (that is, transmitting http over the ssl protocol), so you need to install the OpenSSL library on CentOS.

yum install -y openssl openssl-devel

Only after installing the above four items can you proceed to install Nginx.

Install nginx

Extract

tar zxvf nginx-1.12.1.tar.gz

Compile

cd nginx-1.12.1
./configure
make
make install

After executing the above commands, Nginx installation is complete, but the extracted directory is not the installation directory. Use the following command to find the installation directory. After installation on this machine, the installation directory is: /usr/local/nginx

whereis nginx

Start and stop nginx

Starting and stopping nginx must be executed in the sbin directory of the installation directory. You can also execute it from outside, but you need to write the full path.

# 启动
/usr/local/nginx/sbin/nginx

# 停止
# 下面命令当于先查出nginx进程id再使用kill命令强制杀掉进程。
/usr/local/nginx/sbin/nginx -s stop
# 下面命令待nginx进程处理任务完毕进行停止
/usr/local/nginx/sbin/nginx -s quit

Reload the configuration file

Reload the configuration file. After nginx's configuration file nginx.conf is modified, to make the configuration take effect you need to restart nginx. Using -s reload, you don't need to stop nginx first and then start nginx for the configuration information to take effect in nginx.

/usr/local/nginx/sbin/nginx -s reload

Recommended nginx restart order: Restarting nginx is equivalent to stopping first then starting, i.e. execute the stop command first then the start command.

/usr/local/nginx/sbin/nginx -s quit
/usr/local/nginx/sbin/nginx

PS: It is recommended to add /usr/local/nginx/sbin/ to the environment variables, so you don't have to enter the full path when using nginx.

Set up startup on boot

Edit: /etc/rc.local Add a line: /usr/local/nginx/sbin/nginx

Set execute permission:

chmod 755 rc.local