squid - proxy caching server
squid [ -dhsvzCDFNRVYX ] [ -l facility ] [ -f config-file ] [ -[ au ]
port ] [ -k signal ]
squid is a high-performance proxy caching server for web clients, sup-
porting FTP, gopher, and HTTP data objects. Unlike traditional caching
software, squid handles all requests in a single, non-blocking, I/O-
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 log-
ging. By using the lightweight Internet Cache Protocol, squid caches
can be arranged in a hierarchy or mesh for additional bandwidth sav-
squid consists of a main server program squid, a Domain Name System
lookup program dnsserver, some optional programs for rewriting requests
and performing authentication, and some management and client tools.
When squid starts up, it spawns a configurable number of dnsserver pro-
cesses, each of which can perform a single, blocking Domain Name System
(DNS) lookup. This reduces the amount of time the cache waits for DNS
squid is derived from the ARPA-funded Harvest Project http://har-
This manual page only lists the command line arguments. For details on
how to configure squid see the file /etc/squid/squid.conf, the Squid
FAQ and the documentation at the squid home page http://www.squid-
Specify HTTP port number (default: 3128).
Write debugging to stderr also.
Use the given config-file instead of /etc/squid/squid.conf
-h Print help message.
-k reconfigure | rotate | shutdown | interrupt | kill | debug | check |
Parse configuration file, then send signal to running copy
(except -k parse) and exit.
-s Enable logging to syslog.
Use specified syslog facility. implies -s
Specify ICP port number (default: 3130), disable with 0.
-v Print version.
-z Create swap directories
-C Do not catch fatal signals.
-D Disable initial DNS tests.
-F Don’t serve any requests until store is rebuilt.
-N No daemon mode.
-R Do not set REUSEADDR on port.
-V Virtual host httpd-accelerator.
-X Force full debugging.
-Y Only return UDP_HIT or UDP_MISS_NOFETCH during fast reload.
The main configuration file. You must initially make changes to
this file for squid to work. For example, the default configu-
ration does not allow access from any browser.
Reference copy of the configuration file. Always kept up to date
with the version of Squid you are using. Use this to look up
configuration syntax after upgrading.
MIME type mappings for FTP gatewaying
Error page templates
cachemgr.cgi(8), pam_auth(8), squid_ldap_auth(8), squid_ldap_group(8),
The Squid FAQ
squid 2.5.STABLE10 2005-04-25 squid(8)
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