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Approx saves time and network bandwidth if you need to install or upgrade .deb packages for a number of machines on a local network. Each package is downloaded from a remote site only once, regardless of how many local clients install it. The approx cache typically requires a few gigabytes of disk space.
Approx also simplifies the administration of client machines: repository locations need only be changed in approx's configuration file, not in every client's /etc/apt/sources.list file.
Approx can be used as a replacement for apt-proxy, with no need to modify clients' /etc/apt/sources.list files, or as an alternative to apt-cacher.
Concurrency control issues in approx Eric Cooper <email@example.com> June 2008 The priorities for dealing with concurrency in approx are: 1. ensure correctness (no corrupt files delivered to clients or stored in the cache) 2. maintain good performance (minimize delays due to serialization, minimize number of downloads from remote repositories) There are two sources of potential confli more»
approx (4.4-1) unstable; urgency=low The configuration file for approx can now be specified on the command line (i.e., the /etc/inetd.conf entry) using the "-c" or "--config" option. The pathname of the cache directory can now be specified in the configuration file using the $cache parameter. -- Eric Cooper <firstname.lastname@example.org> Tue, 13 Jul 2010 17:49:35 -0400 approx (4.0-1) unstable; urgenc more»
Changing the temporary directory used by approx The TMPDIR environment variable can be used to specify the temporary directory used by approx. Please see the section on "Passing environment variables to approx", below. Exporting a local package repository This is supported with file URLs. Note that the syntax for file URLs requires 3 leading slashes (two for the URL syntax, and one fo more»
APPROX.CONF(5) APPROX.CONF(5) NAME approx.conf - co more»
APPROX-GC(8) APPROX-GC(8) NAME approx-gc - garb more»
APPROX-IMPORT(8) APPROX-IMPORT(8) NAME approx-import - more»
APPROX-UPDATE(8) APPROX-UPDATE(8) NAME approx-update - more»
APPROX(8) APPROX(8) NAME approx - proxy s more»