On 05/10/2015 at 04:53 AM, Mohsen Pahlevanzadeh wrote:
> On 05/10/2015 09:14 AM, Johannes Schauer wrote:
>
>> Hi,
>>
>> Quoting Mohsen Pahlevanzadeh (2015-05-10 05:53:17)
>>
>>> When i use : grep ^Status: /var/lib/dpkg/status , Unfortunately ,
>>> i only get "Status: install ok installed"
>>
>> how sure are you of that? Did you just look at the first few
>> hundred or did you really find all unique values? Try:
>>
>> grep ^Status: /var/lib/dpkg/status | sort | uniq -c
>>
>> cheers, josch
>
> It's very interseting :
> /////////////////////////////////////////////////////////////////////////
> I did :
> root@debian:/home/mohsen# grep ^Status: /var/lib/dpkg/status | sort | uniq -c
> 1 Status: install ok config-files
> 2803 Status: install ok installed
> ////////////////////////////////////////////////////////////////////
For comparison, I get>
========
$ grep ^Status: /var/lib/dpkg/status | sort | uniq -c
479 Status: deinstall ok config-files
2 Status: hold ok installed
3604 Status: install ok installed
========
> But :
>
> ///////////////////////////////////////////////////////////////////
> root@debian:/home/mohsen# dpkg -l virtualbox*
> Desired=Unknown/Install/Remove/Purge/Hold
> | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
> ||/ Name Version Architecture Description
> +++-==============-============-============-=================================
> un virtualbox <none> <none> (no description available)
> ii virtualbox-4.3 4.3.22-98236 amd64 Oracle VM VirtualBox
> un virtualbox-gue <none> <none> (no description available)
> un virtualbox-ose <none> <none> (no description available)
> ////////////////////////////////////////////////////////////////////////////////////////////////
Yes, this makes sense.
The logic as I understand it is that 'dpkg -l' effectively starts out by
assuming that everything is in status "un", and overrides that for every
package which is listed in /var/lib/dpkg/status.
If that weren't true, then it would be necessary for your system to keep
a list of _all available packages_ in /var/lib/dpkg/status - and since
packages can come from multiple sources, there is no possible way (short
of being omniscient) to compile a list of all available packages, much
less keep it up to date every time someone in the world makes a new
package version.
If you've never installed a package, or if it has been fully purged and
has (or should have) no remnants remaining on the system, then it will
not be included in /var/lib/dpkg/status - and 'dpkg -l' will report
status "un".
--
The Wanderer
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man. -- George Bernard Shaw
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