centos man page for squid

squid(8)						      System Manager's Manual							  squid(8)

NAME
       squid - HTTP web proxy caching server

SYNOPSIS
       squid [-dhisrvzCFNRSVYX] [-l facility ] [-f config-file ] [-[au] port ] [-k signal ] [-n service-name ] [-O command-line ]

DESCRIPTION
       squid  is  a  high-performance proxy caching server for web clients, supporting FTP, gopher, ICAP, ICP, HTCP and HTTP data objects.  Unlike
       traditional caching software, Squid handles all requests in a single, non-blocking process.

       Squid keeps meta data and especially hot objects cached in RAM, caches DNS lookups, supports non-blocking DNS lookups, and implements nega-
       tive caching of failed requests.

       Squid  supports	SSL,  extensive access controls, and full request logging.  By using the lightweight Internet Cache Protocols ICP, HTCP or
       CARP, Squid caches can be arranged in a hierarchy or mesh for additional bandwidth savings.

       Squid consists of a main server program squid , some optional programs for custom processing and authentication, and  some  management  and
       client tools.  When squid starts up, it spawns a configurable number of helper processes, each of which can perform parallel lookups.  This
       reduces the amount of time the cache waits for results.

       Squid is derived from the ARPA-funded Harvest Project.

       This manual page only lists the command line arguments.	For details on how to configure Squid  see  the  file  /etc/squid/squid.conf.docu-
       mented,	the  Squid  wiki  FAQ  and  examples  at  http://wiki.squid-cache.org/	,  or  the  configuration  manual  on  the Squid home page
       http://www.squid-cache.org/Doc/config/

OPTIONS
       -a port	   Specify HTTP port number where Squid should listen for requests, in addition to any http_port specifications in squid.conf

       -C	   Do not catch fatal signals.

       -d level    Write debugging to stderr also.

       -f file	   Use the given config-file instead of /etc/squid/squid.conf .  If the file name starts with a !  or | then it is assumed  to	be
		   an  external  command  or  command  line.   Can for example be used to pre-process the configuration before it is being read by
		   Squid.  To facilitate this Squid also understands the common #line notion to indicate the real source file.

       -F	   Don't serve any requests until store is rebuilt.

       -h	   Print help message.

       -i	   Install as a Windows Service (see -n option).

       -k reconfigure | rotate | shutdown | interrupt | kill | debug | check | parse
		   Parse configuration file, then send signal to running copy (except -k parse ) and exit.

       -l facility Use specified syslog facility. Implies -s

       -n name	   Specify Windows Service name to use for service operations, default is: Squid

       -N	   No daemon mode.

       -O options  Set Windows Service Command line options in Registry.

       -r	   Remove a Windows Service (see -n option).

       -R	   Do not set REUSEADDR on port.

       -s	   Enable logging to syslog. Also configurable in /etc/squid/squid.conf

       -S	   Double-check swap during rebuild.

       -u port	   Specify ICP port number (default: 3130), disable with 0.

       -v	   Print version and build details.

       -X	   Force full debugging.

       -Y	   Only return UDP_HIT or UDP_MISS_NOFETCH during fast reload.

       -z	   Create missing swap directories and other missing cache_dir structures, then exit. All cache_dir types  create  the	configured
		   top-level directory if it is missing. Other actions are type-specific. For example, ufs-based storage systems create missing L1
		   and L2 directories while Rock creates the missing database file.

		   This option does not enable validation of any present swap structures. Its focus is on creation of missing pieces.  If  nothing
		   is  missing, squid -z just exits. If you suspect cache_dir corruption, you must delete the top-level cache_dir directory before
		   running squid -z.

		   By default, squid -z runs in daemon mode (so that configuration macros and other SMP features work as expected). Use -N  option
		   to overwrite this.

FILES
       Squid configuration files located in /etc/squid/:

       squid.conf
	      The  main configuration file. You must initially make changes to this file for squid to work. For example, the default configuration
	      only allows access from RFC private LAN networks.  Some packaging distributions block even that.

       squid.conf.default
	      Reference copy of the configuration file. Always kept up to date with the version of Squid you are using.

	      Use this to look up the default configuration settings and syntax after upgrading.

       squid.conf.documented
	      Reference copy of the configuration file. Always kept up to date with the version of Squid you are using.

	      Use this to read the documentation for configuration options available in your build of Squid. The online  configuration	manual	is
	      also available for a full reference of options.  seehttp://www.squid-cache.org/Doc/config/

       cachemgr.conf
	      The main configuration file for the web cachemgr.cgi tools.

       msntauth.conf
	      The main configuration file for the Sample MSNT authenticator.

       errorpage.css
	      CSS  Stylesheet  to  control  the display of generated error pages.  Use this to set any company branding you need, it will apply to
	      every language Squid provides error pages for.

       Some files also located elsewhere:

       /etc/squid/mime.conf (mime_table)
	      MIME type mappings for FTP gatewaying

       /usr/share/squid/errors
	      Location of Squid error pages and templates.

AUTHOR
       Squid was written over many years by a changing team of developers and maintained in turn by Duane Wessels  <duane@squid-cache.org>  Henrik
       Nordstrom <hno@squid-cache.org> Amos Jeffries <amosjeffries@squid-cache.org>

       With  contributions  from  many	others in the Squid community.	see CONTRIBUTORS for a full list of individuals who contributed code.  see
       CREDITS for a list of major code contributing copyright holders.

COPYRIGHT
       This software product, SQUID, is developed by a team of individuals, and copyrighted (C) 2001 by the Regents of the University of  Califor-
       nia,  with  all	rights	reserved.  UCSD administered the NLANR Cache grants, NCR 9616602 and NCR 9521745 under which most of this code was
       developed.

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License  (version  2)	as
       published  by  the  Free Software Foundation.  It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       see the CREDITS file for further copyright licensing of third-party code contributions.

QUESTIONS
       Questions on the usage of this program can be sent to the Squid Users mailing list <squid-users@squid-cache.org>

REPORTING BUGS
       Bug reports need to be made in English.	See http://wiki.squid-cache.org/SquidFaq/BugReporting for details of what you need to include with
       your bug report.

       Report bugs or bug fixes using http://bugs.squid-cache.org/

       Report serious security bugs to Squid Bugs <squid-bugs@squid-cache.org>

       Report ideas for new improvements to the Squid Developers mailing list <squid-dev@squid-cache.org>

SEE ALSO
       cachemgr.cgi (8), squidclient (1), pam_auth (8), squid_ldap_auth (8), squid_ldap_group (8), ext_session_acl (8), squid_unix_group (8),
       The Squid FAQ wiki http://wiki.squid-cache.org/SquidFaq
       The Squid Configuration Manual http://www.squid-cache.org/Doc/config/

																	  squid(8)