Detailed description of the apache configuration file in linux

Article Title: Detailed description of the apache configuration file in linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

### Section 1: Global Environment
// The Apache version and operating system name are displayed when the server responds to the Host header information.
ServerTokens OS
// Set the root directory of the server
ServerRoot "/etc/httpd"
　　
# ScoreBoardFile run/httpd. scoreboard
　　
// Set the PidFile path used to run Apache
PidFile run/httpd. pid
　　
// If no data is received or sent in 300 seconds, the connection is closed.
Timeout 300
　　
// The Persistence function is not used, that is, the client can only respond to one file at a request
/We recommend that you set the value of this parameter to On, that is, the function of retaining connections is allowed.
KeepAlive Off
　　
// When using the keep connection function, set the maximum number of files that can be responded to by one request.
MaxKeepAliveRequests 100
　　
// When the connection persistence function is used, the two adjacent connections are disconnected after an interval of more than 15 seconds.
KeepAliveTimeout 15
　　
##
# Server-Pool Size Regulation (MPM specific)
##
# Prefork MPM
# StartServers: number of server processes to start
# MinSpareServers: minimum number of server processes which are kept spare
# MaxSpareServers: maximum number of server processes which are kept spare
# MaxClients: maximum number of server processes allowed to start
# MaxRequestsPerChild: maximum number of requests a server process serves
// Set parameters for using the Prefork MPM running mode. The running mode is the default mode of Red hat.
　　
　　
// Set the number of processes that run when the server is started
StartServers 8
　　
// Apache automatically adjusts the number of idle sub-processes according to the weight of the load during running.
// If there are less than five idle sub-processes, create a new sub-process to provide services to the customer.
MinSpareServers 5
　　
// If more than 20 idle sub-processes exist, create and delete sub-processes one by one to improve system performance.
MaxSpareServers 20
　　
// The number of connections at the same time cannot exceed 150
MaxClients 150
　　
// Limit the number of connection requests that each sub-process can process before processing the request ends to 1000.
MaxRequestsPerChild 1000
　　
　　
# Worker MPM
# StartServers: initial number of server processes to start
// Set parameters for running Worker MPM
　　
StartServers 2
MaxClients 150
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0
　　
　　
# Perchild MPM
# NumServers: constant number of server processes
// Set parameters for running with perchild MPM
　　
NumServers 5
StartThreads 5
MinSpareThreads 5
MaxSpareThreads 10
MaxThreadsPerChild 20
MaxRequestsPerChild 0
　　
　　
// Set the listening port of the server
# Listen 12.34.56.78: 80
Listen 202.112.85.101: 80
　　
#
# Load config files from the config directory "/etc/httpd/conf. d ".
// Include all configuration files ending with conf in the/etc/httpd/conf. d directory
Include conf. dpublic_html>
# AllowOverride FileInfo AuthConfig Limit
# Options MultiViews Indexes SymLinksIfOwnerMatch IncludesNoExec
#
# Order allow, deny
# Allow from all
#
#
# Order deny, allow
# Deny from all
#
#
　　
// When the server is running, search for page index.html index.htm. var.
DirectoryIndex index.html. var
　　
// Specify the name of the protected directory configuration file
AccessFileName. htaccess
　　
// Deny access to files starting with. ht, that is, ensure that. htaccess is not accessed
　　
Order allow, deny
Deny from all
　　
　　
// Specify the storage location for configuration files that process MIME-specific formats
TypesConfig/etc/mime. types
// Specify the default MIME file type as a plain text or HTML file
DefaultType text/plain
　　
// When the mod_mime_magic.c module is loaded, specify the storage location of the magic information code configuration file.
　　
# MIMEMagicFile/usr/share/magic. mime
MIMEMagicFile conf/magic
　　
　　
// Only record the IP address connected to the Apache server, not the host name
HostnameLookups Off
// Specify the location where error logs are stored
ErrorLog logs/error_log
// The detailed level of error information recorded is warn.
LogLevel warn
// Define the log format in Step 4
LogFormat "% h % l % u % t" % r "%> s % B" % {Referer} I "" % {User-Agent} I "" combined
LogFormat "% h % l % u % t" % r "%> s % B" common
LogFormat "% {Referer} I-> % U" referer
LogFormat "% {User-agent} I" agent
　　
// Specify the access log record format as combined (hybrid) and the location where the access log is stored
# CustomLog logs/access_log common
CustomLog logs/access_log combined
# CustomLog logs/referer_log referer
# CustomLog logs/agent_log agent
# CustomLog logs/access_log combined
　　
// Set the signature of the apache server version on the page generated by apache itself
ServerSignature On
　　
// Set the access alias of the content negotiation directory
Alias/icons/"/var/www/icons /"
// Set/var/www/icons/Access Permissions
　　
// MultiViews uses content negotiation to determine the nature of the webpage to be sent
Options Indexes MultiViews
AllowOverride None
Order allow, deny
Allow from all
　　
　　
// Set the webpage email service
Alias/webmail "/usr/share/squirrelmail"
　　
　　
Options Indexes MultiViews
AllowOverride None
Order allow, deny
Allow from all
　　

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