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 negative 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.documented, 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:

       /usr/share/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

        * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
        *
        * Squid software is distributed under GPLv2+ license and includes
        * contributions from numerous individuals and organizations.
        * Please see the COPYING and CONTRIBUTORS files for details.

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)