Nginx configuration and application of virtual host

One, nginx configuration file is divided into three parts, global configuration, I/O event configuration and HTTP configuration. "#" represents a comment, ending with ";" at the end of the configuration item

1. The global configuration includes nginx running user, number of working process, error log, PID storage location and other basic information

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Here the working process defaults to 1, if the server has more than one CPU or a multi-core processor, we can modify the number of worker processes to be the same as the number of CPU cores, but if the site traffic demand is not large, generally set to 1 is enough

2.I/O event configuration, using "events {}" to delimit the tag, to specify the nginx process I/O corresponding module, the number of links not a process, and so on. For versions 2.6 and above, it is recommended to use the Epoll model to improve performance; The number of connections per process is based on actual needs, typically below 10000, and 1024 by default.

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3.HTTP configuration, using "http {}" to delimit tags, including access logs, HTTP port, web directory, default character set, connection hold and its virtual host, PHP parsing, and a series of settings, most of which are included in the sub-definition tag "server {}"

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If you want to make changes to find the corresponding configuration item modification, then restart the Nginx service after modification

Second, the domain-based virtual web host

1. First we create two test pages for testing

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2. Next, modify the Nginx configuration file, add the following two server configuration items in the HTTP configuration, Note: the "{}" of the server configuration item must be paired, and end with ";" at the end of each line of configuration item, save exit and restart Nginx service

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3. Test, use domain name to access two websites, see if it can be used properly

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Nginx configuration and application of virtual host