Backup Linux Package

A way to save your linux package and restore it for new installation.

Step One – Get a list of installed packages

Once you have your machine set up more or less as you want it, export the list of installed packages to a file like this:

dpkg --get-selections > package.list
Step Two – keep the list safe!

Keeping the list safe is more important than keeping it up to date. I keep mine in my DropBox account with a few other essential items. Using DropBox means I can grab the file via the web if I need it in a hurry. Not much point if I needed to install DropBox before I could access the file!

Step Three – Recover

Bring everything back in one massive update if things go wrong:

sudo dpkg --set-selections > package.list 
sudo apt-get dselect-upgrade

Source: http://radio.javaranch.com/davo/2011/03/09/1299682981215.html

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