نصب IBSng در سیستم عامل Debian

[m_dg_farari]

ممنون ولی کار نداد

Reading package lists... Done
Building dependency tree
Reading state information... Done
Package httpd is a virtual package provided by:
  apache2-mpm-worker 2.2.16-6+squeeze1
  apache2-mpm-prefork 2.2.16-6+squeeze1
  apache2-mpm-itk 2.2.16-6+squeeze1
  apache2-mpm-event 2.2.16-6+squeeze1
You should explicitly select one to install.

Package dovecot is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  dovecot-common

E: Package 'httpd' has no installation candidate
E: Unable to locate package postgresql-server
E: Unable to locate package postgresql-python
E: Unable to locate package php-gd
E: Unable to locate package php-mbstring
E: Unable to locate package php-pdo
E: Unable to locate package kernel
E: Unable to locate package mod_python
E: Unable to locate package php
E: Unable to locate package httpd-manual
E: Unable to locate package system-config-httpd
E: Unable to locate package webalizer
E: Unable to locate package mod_perl
E: Unable to locate package perl-DBD-Pg
E: Unable to locate package mod_ssl
E: Unable to locate package postgresql-libs
E: Unable to locate package apr-util
E: Package 'dovecot' has no installation candidate