Provided by: squid-openssl_5.6-1ubuntu3_amd64 bug


       squid - HTTP web proxy caching server


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


       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 ,  or  the  configuration  manual  on  the  Squid  home  page


       -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.

                   Parent  process  does  not  exit  until  its children have finished. It has no
                   effect with -N which does not fork/exit at startup.

       --kid roleID
                   Play a given SMP kid process role, with a given ID. Do not use this option. It
                   is meant for the master process use only.

       -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), returning control to the caller before
                   cache_dirs are fully initialized. If run from init scripts or daemon managers,
                   the  caller  often  needs  to  wait  for the initialization to complete before
                   proceeding further.  Use --foreground option to prevent  premature  exits.  To
                   disable daemon mode, use -N option.


       Squid configuration files located in /etc/squid/:

              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.

              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.

              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.  see

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

              The main configuration file for the Sample MSNT authenticator.

              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

              Location of Squid error pages and templates.


       Squid  was written over many years by a changing team of developers and maintained in turn
       by Duane  Wessels  <>  Henrik  Nordstrom  <>  Amos
       Jeffries <>

       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 (C) 1996-2022 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 on the usage of this program can be sent to the Squid Users mailing list <squid->


       Bug    reports    need    to    be    made    in    English.     See    http://wiki.squid-  for  details  of  what  you need to include with your bug

       Report bugs or bug fixes using

       Report serious security bugs to Squid Bugs <>

       Report  ideas  for  new  improvements  to  the  Squid  Developers  mailing  list   <squid->


       cachemgr.cgi    (8),   squidclient   (1),   basic_pam_auth   (8),   basic_ldap_auth   (8),
       ext_ldap_group_acl (8), ext_session_acl (8), ext_unix_group_acl (8),
       The Squid FAQ wiki
       The Squid Configuration Manual