Provided by: auto-apt-proxy_13.4_all bug


       auto-apt-proxy - autodetect common APT proxy setups



       auto-apt-proxy [COMMAND [ARGS ...]]


       auto-apt-proxy is an APT proxy autodetector, and detects common setups by checking
       localhost, your gateway and other "interesting" machines on your network for well-known
       APT proxies such as apt-cacher-ng and others.

       When called with no arguments, auto-apt-proxy simply prints the address of a detected
       proxy to the standard output. This package installs an APT configuration file that makes
       APT use auto-apt-proxy to detect a proxy on every invocation of APT.

       When called with arguments, they are assumed to be a command. Such command will be
       executed with the common environment variables used for specifying HTTP proxies
       (http_proxy, HTTP_PROXY) set to the detected proxy. This way the executed command will be
       able to transparently use any detected APT proxy. Note that for this to work, any programs
       invoked by the given command must have their own support for detecting HTTP proxies from
       those environment variables, and for using them.


       When your apt proxy is installed on localhost or your default gateway, it should Just
       Work.  If you install it somewhere else, you can create an explicit SRV record to tell
       auto-apt-proxy about it.

       Suppose your corporate domain is "", and apt-cacher-ng is installed on
       "", and auto-apt-proxy is installed on

       The appropriate SRV record in dnsmasq.conf would look like this:


       The appropriate nsd/bind zonefile entry would look like this (untested):

           _apt_proxy._tcp.@  IN SRV 0 0 3142 apt-cacher-ng.@

       As an alternative to an SRV record, one can also define a special hostname which needs to
       be resolved via DNS or local /etc/hosts file, called apt-proxy.  For example, if your
       network has a local apt proxy at, then add this line to /etc/hosts:



       By default, auto-apt-proxy will cache its results for 60 seconds.

       To disable the cache, set the `AUTO_APT_PROXY_NO_CACHE` environment variable to any non-
       empty string.


       $ auto-apt-proxy

       Just prints the detected APT proxy

       $ auto-apt-proxy debootstrap sid /my/chroot

       Creates a new Debian chroot downloading packages from the local proxy.


       Copyright (C) 2016-2020 Antonio Terceiro

       This program is free software: you can redistribute it and/or modify it under the terms of
       the GNU General Public License as published by the Free Software Foundation, either
       version 3 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
       without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program.
       If not, see <>.

                                            2021-08-22                          auto-apt-proxy(1)