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When a package is requested, the cache checks whether it already has the requested version, in which case it sends the package to the user immediately. If not, it downloads the package while streaming it to the user at the same time. A local copy is then kept for use by other users.
Apt-cacher has been optimized for best utilization of network bandwidth and efficiency even on slow low-memory servers. Multiple ways of installation are possible: as a stand-alone HTTP proxy, as a daemon executed by inetd or as a CGI program (deprecated). Client machines are configured by changing APT's proxy configuration or modification of access URLs in sources.list.
The package includes utilities to clean the cache (removing obsolete package files), generate usage reports and import existing package files. Optional features include a simple package checksum verification framework and IPv6 support. Experimental features include support for FTP, HTTPS (proxying only), Debian Bugs SOAP requests as well as the simultaneous caching of different repositories (e.g Debian and Ubuntu).
Apt-cacher can be used as a replacement for apt-proxy, with no need to modify client's /etc/apt/sources.list files (and even reusing its config and cached data), or as an alternative to approx.
apt-cacher for Debian --------------------- SECURITY: The most important question is how much the local users can be entrusted. Since the cached data is (gently) cleaned once a day by a script that parses Packages*/Sources* files, this step may be sensitive to DOS attacks through malicious files. Though the risk is low, make sure that you limit the site access (see allowed_locations directive) t more»
apt-cacher (1.7.1) unstable; urgency=low * New option concurrent_import_limit to control maximum number of index files that are processed simultaneously (to limit CPU load on slower systems) * Workarounds for perl versions < 5.10.0. If you are running perl < 5.10.0 and wish to use the more efficient \K based regexp, install Regexp::Keep from CPAN. -- Mark Hindley <mark@hi more»
APT-CACHER(8) APT-CACHER(8) NAME apt-cacher - caching proxy for Debian packages SYNOPSIS Server: apt-cacher [-i|-d] [-c configfile ] [-p pidfile] [-r directory] [-R retries] [config_option=foo] [-h|--help] Client: http://apt-cacher.server:3142[/apt-cacher]/ [mirror] / [distribution] DESCRIPTION Apt-cach more»
apt-cacher (1.7.6) unstable; urgency=low * Fix missing argument to $r->header when disk_usage_lim more»
This package was debianized by Jonathan Oxer firstname.lastname@example.org on Fri, 5 Apr 2002 23:30:07 +1000. It more»