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In Ubuntu/Debian are apt-get install/upgrade calls cached on a transparent proxy(That is setup with squid).

While I would like to think they are (to save bandwidth in a large network) I haven't found anything that verifies or denies this. Also keep in mind most of my repositories are are setup to use HTTP (which should be cache-able).

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up vote 2 down vote accepted

apt-mirror does this...that's it's sole purpose

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Thanks the app is pretty awesome – RC1140 Jan 12 '11 at 8:11

apt uses standard HTTP GET requests, which should be cached by Squid the same way as normal browsing.

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