Comment 8 for bug 967182

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Maria Geller (mariageller67-deactivatedaccount) wrote : Re: Flash plugin 11.2.202.228 breaks firefox and chromium in Precise and Oneiric

I should have mentioned that anything that uses apt for installation, like apt-get or aptitude or synaptic or even the "software centre" downloads the debs into /var/cache/apt/archives. So all you need do to keep a copy of a package deb is to make a dir to hold your stuff e.g.

sudo mkdir -p /usr/local/backup

and then copy the file(s) in e.g.

sudo cp /var/cache/apt/archives/adobe-flash*11.1.102.63*.deb /usr/local/backup

to install one or more .deb or you do e.g.

sudo dpkg -i /usr/local/backup/adobe-flash*11.1.102.63*.deb

Easy as that. The point about only having files in /usr that came from a .deb cannot be stressed enough. If you manually copy stuff in, it will break something sooner or later. It is an absolute CERTAINTY.