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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 (4.0-1) unstable; urgency=low The approx program no longer runs as an independent daemon; it is now run by inetd. Since the listening port and addresses can be specified in /etc/inetd.conf, the $port and $interface configuration parameters have been removed. Host access control using /etc/hosts.allow and /etc/hosts.deny is also supported by inetd. -- Eric Cooper <firstname.lastname@example.org> more»
Changing the location of the approx cache Move your cache where you want it, then replace the /var/cache/approx directory by a symlink: mv /var/cache/approx /somewhere ln -s /somewhere/approx /var/cache/approx You should use a subdirectory for the cache, not a top-level filesystem with a lost+found directory in it, to avoid complaints from the approx-gc program. Exporting 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»