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====== Create an Apt Repository Mirror with apt-mirror ======

The goal of this guide is to set up a local Debian package mirror using the ''%%apt-mirror%%'' tool and Apache to serve the files.

===== Install apt-mirror =====

The version of ''%%apt-mirror%%'' that is included in the Debian repositories is old and broken, so we need to use a forked version that is not broken. [[https://github.com/Stifler6996/apt-mirror|Stifler6996 on GitHub provides a non-broken version]] that we will use today.

So first we will install Git to clone the repository:

<code>apt install -y git</code>

Then we will find a suitable spot to install apt-mirror, clone the repository, and then symlink it to ''%%/usr/local/bin%%'' so it's easy to call:

<code>
cd /usr/local/src
git clone https://github.com/Stifler6996/apt-mirror
ln -s /usr/local/src/apt-mirror/apt-mirror /usr/local/bin
</code>

===== Configuring apt-mirror =====

Now we need to set up apt-mirror to download our repositories. Before continuing, make sure you have a sizeable disk mounted somewhere on this system to store the downloaded repositories. For the sake of this demo I'm assuming you have a disk mounted at ''%%/srv/repos%%'', but if you want them stored elsewhere then just change that path to match your config.

Thankfully apt-mirror is easy to configure. It's basically just creating ''%%/etc/apt/mirror.list%%'' with the sources entries you want and some options telling apt-mirror how to behave. Below is an example that will copy the major Debian repositories:

<code>
############# config ##################
#
set base_path    /var/spool/apt-mirror
#
set mirror_path  /opt/repos/ubuntu
# set skel_path    $base_path/skel
# set var_path     $base_path/var
# set cleanscript $var_path/clean.sh
set defaultarch  amd64
# set postmirror_script $var_path/postmirror.sh
# set run_postmirror 0
set nthreads     20
set _tilde 0
#
############# end config ##############

# Debian 11 (Bullseye)
... repos ...

clean ...
</code>

===== Install Apache =====

Install Apache:

<code>apt install -y apache2</code>