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This article mainly explains "the installation and configuration of apache httpd". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's ideas to study and learn "the installation and configuration of apache httpd".

Installation package

Yum-y install httpd

Command

/ usr/sbin/httpd

Httpd: root:root lead process (master process)

Httpd: apche:ache worker process (work process)

Service

/ etc/init.d/httpd

Port:

80 tcp

443 ssl

The working root directory (equivalent to the program installation directory)

/ etc/httpd

/ etc/httpd/conf configuration file directory

/ etc/httpd/conf/httpd.conf main configuration file

/ etc/httpd/conf.d/*.conf these files are part of the main configuration file and are included with include in the main configuration file

/ etc/httpd/modules module directory

/ etc/httpd/logs-- > / var/log/httpd log directory

There are two types of log files: access _ log, error log: err_log

/ var/www/

Html static page directory

Cgi-bin

Welcome page:

/ etc/httpd/conf.d/welcome.conf

Do not display the welcome page

[root@LinuxTest named] # mv / etc/httpd/conf.d/welcome.conf / etc/httpd/conf.d/welcome.conf.bak

[root@LinuxTest named] # / etc/init.d/httpd restart

Stopping httpd: [OK]

Starting httpd: [OK]

Create a test page

Echo-e "

Hello world

Hello world

Welcome to our website

"> > / var/www/html/index.html

/ etc/httpd/conf/httpd.conf detailed explanation

It is mainly divided into three parts, the second part and the third part cannot be effective at the same time.

[root@LinuxTest named] # grep "Section" / etc/httpd/conf/httpd.conf

# Section 1: Global Environment

# Section 2: 'Main' server configuration

# Section 3: Virtual Hosts

Section 1:

The working directory of the ServerRoot "/ etc/httpd" server. Do not change it easily.

Wait timeout for unsuccessful establishment of Timeout 60 tcp connection

Whether KeepAlive Off uses persistent connections

Maximum number of requests per persistent connection for MaxKeepAliveRequests 100. zero means unlimited.

Length of disconnection of KeepAliveTimeout 15 long connections (in second)

MPM Multi Path Modules

Prefork A request is responded by a process

# StartServers: the number of processes that the number of server processes to start startup service is

# MinSpareServers: minimum number of idle processes in minimum number of server processes which are kept spare

# MaxSpareServers: maximum number of idle processes in maximum number of server processes which are kept spare

# ServerLimit: maximum value for MaxClients for the lifetime of the server specifies the online value of maxclients

# MaxClients: how many clients are allowed to connect at the same time in maximum number of server processes allowed to start

# MaxRequestsPerChild: maximum number of requests a server process serves the maximum number of requests per process

Worker A request is responded by a thread. Start multiple processes, each generating multiple threads

# StartServers: the number of processes in which initial number of server processes to start starts the service

# MaxClients: maximum number of maximum number of simultaneous client connections client connections

# MinSpareThreads: minimum number of worker threads which are kept spare minimum idle thread

# MaxSpareThreads: maximum number of worker threads which are kept spare maximum idle thread

# ThreadsPerChild: constant number of worker threads in each server process how many threads are generated by a process

# MaxRequestsPerChild: the number of requests per process in maximum number of requests a server process serves. 0 is unqualified.

Event one process processes multiple requests

Httpd-l lists the MPM models specified by the current httpd

Modify the startup default MPM model of HTTP

Vi / etc/sysconfig/httpd modify the configuration file of httpd

HTTPD=/usr/sbin/httpd.worker

The port on which the Listen 80 service listens. IP can be omitted. Not writing IP means listening to all addresses. Listen can have more than one

Section 2:

ServerAdmin root@localhost specifies the administrator email address, one for each site

The name of the ServerName www.example.com:80 server, which resolves IP to FQDN. Note: it is necessary in virtual hosts, especially those based on host names.

DocumentRoot "/ var/www/html" specifies the document root directory

Define the access rights of the root directory, etc.

Options Indexes FollowSymLinks is optional:

None does not support any options

Indexes (list the information in the directory, which is strongly not recommended in production, unless it is a download station)

Includes is not secure, allowing server-side inclusion (SSI)

FollowSymLinks follows symbolic links, allowing access to files pointed to by symbolic links. It is strongly not recommended to use the

SymLinksifOwnerMatch allows access to files executed by symbolic links, and is not recommended

ExecCGI allows execution of CGI scripts

MultiViews multi-function view (content negotiation mechanism), which is not recommended unless it supports multiple languages

All supports all options

AllowOverride None allows overrides, overriding the 2 options below. Optional: All,None,AuthConfig (based on account authentication)

Htpasswd creates a password file (Picture 2)

-c create a password file

-m md5 encryption

Htpasswd-c-m / etc/httpd/conf/htpasswd hadoop

Htpasswd-m / etc/httpd/conf/htpasswd hadoop

Order allow,deny order is used to define host-based access capabilities. (IP, network address or host-defined access control mechanism), allow and deny in order, order is critical

Allow from all

Or deny from all,allow from 192.168.56.0 go 24 (allow access to 56 network segments), or you can specify IP

DirectoryIndex index.html index.html.var specifies the default access page

It is not recommended whether HostnameLookups Off resolves IP to hostname in the log.

ErrorLog logs/error_log error log

LogLevel warn log level. Include: debug, info, notice, warn, error, crit,alert, emerg.

LogFormat specifies the log format

Section 3: (picture 3)

Profile syntax check: httpd-t checks profile syntax

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