Linux repositories inspector


Apr 2012


caching proxy server for Debian archive files


approx.conf - configuration file for approx proxy server




Each non-blank line of the configuration file should contain a name/value pair, separated by white space. Comments start with a "#" character and continue to the end of the line.
Names that begin with the "$" character are reserved for use as configuration parameters. The following parameters are currently defined:
$cache Specifies the location of the approx cache directory (default: /var/cache/approx). It and all its subdirectories must be owned by the approx server (see also the $user and $group parameters, below.)
$interval Specifies the time in minutes after which a cached file will be considered too old to deliver without first checking with the remote repository for a newer version (default: 60)
$max_rate Specifies the maximum download rate from remote repositories, in bytes per second (default: unlimited). The value may be suffixed with "K", "M", or "G" to indicate kilobytes, megabytes, or gigabytes per second, respectively.
$max_redirects Specifies the maximum number of HTTP redirections that will be followed when downloading a remote file (default: 5)
$user, $group Specifies the user and group that owns the files in the approx cache (default: approx)
$syslog Specifies the syslog(3) facility to use when logging (default: daemon)
$pdiffs Specifies whether to support IndexFile diffs (default: true)
$offline Specifies whether to deliver (possibly out-of-date) cached files when they cannot be downloaded from remote repositories (default: false)
$max_wait Specifies how many seconds an approx(8) process will wait for a concurrent download of a file to complete, before attempting to download the file itself (default: 10)
$curl_path Specifies the path to the curl binary (default: /usr/bin/curl)
$verbose Specifies whether informational messages should be printed in the log (default: false)
$debug Specifies whether debugging messages should be printed in the log (default: false)
The other name/value pairs are used to map distribution names to remote repositories. For example,


The port on which approx(8) listens is not specified in this file, but in /etc/inetd.conf. The default value is 9999, for compatibility with apt-proxy(8), but it may be changed by running the command
dpkg-reconfigure approx


Eric Cooper <>
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