خروجی قبلی اشتباه شد درستش اینه:
root@Debian:~# aptitude install gns3
The following NEW packages will be installed:
  dynamips{a} gns3 libphonon4{a} libqt4-assistant{a} libqt4-help{a} 
  libqt4-scripttools{a} libqt4-svg{a} libqt4-test{a} libqt4-webkit{a} 
  libqt4-xmlpatterns{a} python-qt4{a} python-sip{a} 
The following partially installed packages will be configured:
  debconf man-db 
0 packages upgraded, 12 newly installed, 0 to remove and 1 not upgraded.
Need to get 3,115 kB/18.1 MB of archives. After unpacking 62.3 MB will be used.
Do you want to continue? [Y/n/?] y
Get:1 ftp://ftp.debian.org/debian/ stable/non-free gns3 all 0.7.2-1 [3,115 kB]
Fetched 3,115 kB in 3min 55s (13.2 kB/s)                                        
debconf: Perl may be unconfigured (Can't locate strict.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.10.1 /usr/local/share/perl/5.10.1 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at (eval 1) line 2.
BEGIN failed--compilation aborted at (eval 1) line 2.
) -- aborting
Setting up debconf (1.5.44) ...
Can't locate strict.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.10.1 /usr/local/share/perl/5.10.1 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at /usr/share/debconf/frontend line 5.
BEGIN failed--compilation aborted at /usr/share/debconf/frontend line 5.
dpkg: error processing debconf (--configure):
 subprocess installed post-installation script returned error exit status 2
configured to not write apport reports
                                      Errors were encountered while processing:
 debconf
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
Setting up debconf (1.5.44) ...
Can't locate strict.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.10.1 /usr/local/share/perl/5.10.1 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at /usr/share/debconf/frontend line 5.
BEGIN failed--compilation aborted at /usr/share/debconf/frontend line 5.
dpkg: error processing debconf (--configure):
 subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of man-db:
 man-db depends on debconf (>= 1.2.0) | debconf-2.0; however:
  Package debconf is not configured yet.
  Package debconf-2.0 is not installed.
  Package debconf which provides debconf-2.0 is not configured yet.
dpkg: error processing man-db (--configure):
 dependency problems - leaving unconfigured
dpkg: error processing python-crypto (--configure):
 Package is in a very bad inconsistent state - you should
 reinstall it before attempting configuration.
Errors were encountered while processing:
 debconf
 man-db
 python-crypto
البته اینم بگم قبلا فقط man-db این پایین بود.