Re: What is the difference?
On 2011-03-09 20:40 +0100, Hans-J. Ullrich wrote:
> It is not a great problem, but I wondered, why non-installed packages appeared
> as to be installed.
Because they have been selected for installation (dselect sometimes
"helpfully" does that automatically when you run it as root).
> When I googled, most sites are pointing to version a) and
> some to b). The correct version is b) --> dpkg --get-selections > mylist.txt,
> (if you want, like me, ONLY installed packages). Maybe the manual should be
> improved, to make it clear?
I think the manual is clear enough, but there is one caveat: with older
dpkg versions (prior to version 1.15.4), "dpkg --get-selections '*'"
would even print packages that are purged and _not_ marked for
installation. This could be used to purge installed packages on the
target system where you feed the list to "dpkg --set-selections".
Since this is no longer possible, you should run
"dpkg --clear-selections" prior to "dpkg --set-selections" to replicate
an installation on another computer.
Sven
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