Apt-Cacher NG is a caching HTTP download proxy for software packages, primarily made for Debian/Ubuntu clients but also usable with OpenSUSE and Cygwin archive mirrors.
The main principle is that a central machine hosts the proxy for a local
network, and clients configure their APT setup to download through it.
Apt-Cacher NG keeps a copy of all useful data that passes through it, and when
a similar request is made, the cached copy of the data is delivered without
being re-downloaded.
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