I've got a couple machine here that I want to have share their lists of available packages and downloaded package binaries. To this end, I've had one of them share its /var/cache/apt directory and NFS mounted it on the other.
Unfortunately, this doesn't quite work. When I update the list of available packages on one machine, the other one doesn't see the update. Based on the apt-cache man page, I suspect that the missing piece may be in /var/log/dpkg, but I would expect sharing that directory would confuse the two boxes regarding who has what installed. (They are not intended to have the same sets of installed packages, I just don't care to be redownloading files that overlap between the two.)
