[Nottingham] Preserving a list of packages installed (Ubuntu but could be general!)

[Peter Chang]

On Thu, 28 Sep 2006, Simon Huggins wrote:

> On Thu, Sep 28, 2006 at 07:38:32PM +0100, Peter Chang wrote:
> > $ dpkg -l > olddeb.lis
> 
> dpkg --get-selections  >somefile
> is the standard Debian/Ubuntu way to do this.
> 
> You can then use:
> dpkg --set-selections <somefile
> to mirror the package states though doing this between different
> versions of Debian/Ubuntu will lead to interesting things happening :)

Ah, watch out for the man page comment:

 Note that this will not actually install or remove anything, but just set
the selection state on the requested packages. You will need some other
application to actually download and install the requested packages. For
example, run dselect and choose "Install".

Peter



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