Hey Mohsen,
The short answer is /var/lib/dpkg/status.
There might be easier ways, but strace can give you some hints wrt where to
look if you're patient:
$ strace dpkg -l virtualbox 2>&1 | grep open | grep O_RDONLY | grep -v
ENOENT
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libselinux.so.1", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libpcre.so.3", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
open("/proc/filesystems", O_RDONLY) = 3
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
openat(AT_FDCWD, "/etc/dpkg/dpkg.cfg.d",
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
open("/etc/dpkg/dpkg.cfg", O_RDONLY) = 3
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
open("/var/lib/dpkg/arch", O_RDONLY) = 3
open("/var/lib/dpkg/status", O_RDONLY) = 3
open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 4
openat(AT_FDCWD, "/var/lib/dpkg/updates/",
O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
open("/var/lib/dpkg/triggers/File", O_RDONLY) = 3
open("/var/lib/dpkg/triggers/Unincorp", O_RDONLY) = 3
open("/proc/meminfo", O_RDONLY|O_CLOEXEC) = 4
open("/usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache", O_RDONLY) = 4
In the middle of all that noise you'll notice it's opening
/var/lib/dpkg/status. If you run "head /var/lib/dpkg/status" you should get
an idea of what's going on.
Cheers,
Tom
On Sat, May 9, 2015 at 7:41 PM, Mohsen Pahlevanzadeh <
moh...@pahlevanzadeh.org> wrote:
> Dear Mentors,
>
> Suppose :
>
> ///////////////////////////////////////////////////////////////////////////////////////////
> 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)
>
> ///////////////////////////////////////////////////////////////////////////////////////////////////////
>
> My query means not installed and installed !(ii)
>
> When dpkg read it, dpkg read from where?
>
>
> --Regards
> Mohsen
>
>
> -- To UNSUBSCRIBE, email to debian-mentors-requ...@lists.debian.org with
> a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
> Archive: https://lists.debian.org/554ec53c.9090...@pahlevanzadeh.org
--
*Tom Lee */ http://tomlee.co / @tglee <http://twitter.com/tglee>
