list of installed packages without using apt?

[Oliver Grawert]

hi,
Am Montag, den 27.11.2017, 15:18 -0700 schrieb Stuart McGraw:
> Is there some way of getting output similar to 'apt list --
> installed' 
> without using apt?  Specifically I want a list of installed packages,
> their version numbers, and whether they were installed at my request
> or as a dependency.  dpkg-query provides the first two items and I 
> think apt-mark the last, but the problem is combining them.
> 
> I dont want to use apt because: 1) I am using in a shell script and 
> apt prints an annoying warning, 2) The warning recommends against 
> using apt in scripts :-)  I want to use basic low-level commands
> and not large complex things like apt or aptitude. 
> 
> 

the proper way would be:

dpkg -l | grep ^ii

installed debian packages store package info in /var/lib/dpkg/info/ ...
if you don't want to use dpkg-query or dpkg -l you could also do
something (slightly hackish) like:

ls /var/lib/dpkg/info/|grep .md5sums

to get the list of installed packages ... 


ciao
	oli
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