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Most of us will install our GNU/Linux system once or twice and then use the excellent package management systems to upgrade when new releases of our chosen distribution come out. Users of Debian and Debian-based systems (such as Ubuntu) will be quite used to the idea that you only need to install it once. But what happens when you want to replicate one Debian system on another machine? Do you use cloning tools? Yes you can but only if the hardware is similar on the two machines. What if one has an Intel Pentium-based processor and the other has an AMD64? In that case what you need is some way to replicate the package selection but use the appropriate ones for the new architecture. Enter dpkg. Read the article at Free Software Magazine.
A few typed lines works better than thousands of mouse clicks.
I've used the same get-selections/set-selections when upgrading as well. I wanted to do encrypted LVM, and used the get/set to make sure that all the same package names (get/set does NOT set versions, just names) were at least _attempted_.
Anything that isn't there any more just won't be selected by name. Much of those kinds of things are covered by dependencies anyway.
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I've used the same get-selections/set-selections when upgrading as well. I wanted to do encrypted LVM, and used the get/set to make sure that all the same package names (get/set does NOT set versions, just names) were at least _attempted_.
Anything that isn't there any more just won't be selected by name. Much of those kinds of things are covered by dependencies anyway.