root@SQUID:/etc/apache2# dpkg -l | grep mysql
ii  libdbd-mysql-perl                 4.019-1                                 Perl5 database interface to the MySQL database
ii  libmysqlclient16                  5.1.67-0ubuntu0.11.10.1                 MySQL database client library
ii  mysql-client-5.1                  5.1.67-0ubuntu0.11.10.1                 MySQL database client binaries
ii  mysql-client-core-5.1             5.1.67-0ubuntu0.11.10.1                 MySQL database core client binaries
ii  mysql-common                      5.1.67-0ubuntu0.11.10.1                 MySQL database common files, e.g. /etc/mysql/my.cnf
ii  mysql-server-5.1                  5.1.67-0ubuntu0.11.10.1                 MySQL database server binaries and system database setup
ii  mysql-server-core-5.1             5.1.67-0ubuntu0.11.10.1                 MySQL database server binaries
ii  php5-mysql                        5.3.6-13ubuntu3.10                      MySQL module for php5

root@SQUID:/etc/apache2# dpkg -l | grep cacti
ii  cacti                             0.8.7g-2.1ubuntu0.1                     Frontend to rrdtool for monitoring systems and services

Package: mysql-server-5.1
New: yes
State: installed
Automatically installed: no
Version: 5.1.67-0ubuntu0.11.10.1
Priority: optional
Section: database
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Uncompressed Size: 14.3 M
Depends: mysql-client-5.1 (>= 5.1.67-0ubuntu0.11.10.1), libdbi-perl, perl (>= 5.6), libc6 (>= 2.7), libmysqlclient16 (>= 5.1.50-1), libstdc++6 (>= 4.1.1), zlib1g
         (>= 1:1.1.4), debconf (>= 0.5) | debconf-2.0, upstart-job, psmisc, passwd, lsb-base (>= 3.0-10), mysql-server-core-5.1 (= 5.1.67-0ubuntu0.11.10.1),
         upstart (>= 0.6.7-3)
PreDepends: mysql-common (>= 5.1.67-0ubuntu0.11.10.1), adduser (>= 3.40), debconf
Recommends: libhtml-template-perl
Suggests: tinyca, mailx
Conflicts: mysql-server (< 5.1.67-0ubuntu0.11.10.1), mysql-server (< 5.1.67-0ubuntu0.11.10.1), mysql-server-4.1, mysql-server-4.1, mysql-server-5.1
Replaces: libmysqlclient-dev (<= 5.1.41-1), libmysqlclient-dev (<= 5.1.41-1), mysql-server (< 5.1.67-0ubuntu0.11.10.1), mysql-server (< 5.1.67-0ubuntu0.11.10.1),
          mysql-server-5.0, mysql-server-5.0
Provides: mysql-server, mysql-server-5.0, virtual-mysql-server
Description: MySQL database server binaries and system database setup
 MySQL is a fast, stable and true multi-user, multi-threaded SQL database server. SQL (Structured Query Language) is the most popular database query language in
 the world. The main goals of MySQL are speed, robustness and ease of use.

 This package contains all the infrastructure needed to setup system databases.
Homepage: http://dev.mysql.com/

root@SQUID:/etc/apache2# aptitude show cacti
Package: cacti
State: installed
Automatically installed: no
Version: 0.8.7g-2.1ubuntu0.1
Priority: extra
Section: universe/web
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Uncompressed Size: 5,657 k
Depends: apache2 | apache | apache-ssl | apache-perl | httpd, libapache2-mod-php5 | php5, php5-mysql, php5-cli, php5-snmp, virtual-mysql-client, rrdtool, snmp,
         libphp-adodb (>= 4.50-1), ucf, dbconfig-common (>= 1.8.8), debconf (>= 0.5) | debconf-2.0
Recommends: mysql-server, iputils-ping, logrotate
Suggests: php5-ldap
Conflicts: cacti
Description: Frontend to rrdtool for monitoring systems and services
 Cacti is a complete frontend to rrdtool, it stores all of the necessary information to create graphs and populates them with data in a MySQL database.  The
 frontend is completely PHP driven.  Along with being able to maintain Graphs, Data Sources, and Round Robin Archives in a database, cacti handles the data
 gathering also.  There is also SNMP support for those used to creating traffic graphs with MRTG.

 This package requires a functional MySQL database server on either the installation host or remotely accessible system.  If you do not already have a database
 server available, you should also install mysql-server.
Homepage: http://www.cacti.net/

root@SQUID:/etc/cacti# cat debian.php
<?php
##
## database access settings in php format
## automatically generated from /etc/dbconfig-common/cacti.conf
## by /usr/sbin/dbconfig-generate-include
## Thu, 11 Apr 2013 15:10:41 +0400
##
## by default this file is managed via ucf, so you shouldn't have to
## worry about manual changes being silently discarded.  *however*,
## you'll probably also want to edit the configuration file mentioned
## above too.
##
$database_username='cacti';
$database_password='cacti';
$basepath='';
$database_default='cacti';
$database_hostname='localhost';
$database_port='3306';
$dbtype='mysql';

Считаю на этом этапе тоже все верно, ведь юзер и пароль и порт верны. А еще почему верно? Потому, что я когда в вебморде пишу [b]http://192.168.0.2/cacti/[/b], он уже не выдает ошибок, что не могу подключиться к базе данных, как это было у меня раньше. Просто вместо этого пустой белый экран! Возможно это из-за того, что таблиц нет для [b]cacti[/b]. Об это я и хотел сказать в третьем этапе

#    ErrorDocument 413 /error/HTTP_REQUEST_ENTITY_TOO_LARGE.html.var
#    ErrorDocument 414 /error/HTTP_REQUEST_URI_TOO_LARGE.html.var
#    ErrorDocument 415 /error/HTTP_UNSUPPORTED_MEDIA_TYPE.html.var
#    ErrorDocument 500 /error/HTTP_INTERNAL_SERVER_ERROR.html.var
#    ErrorDocument 501 /error/HTTP_NOT_IMPLEMENTED.html.var
#    ErrorDocument 502 /error/HTTP_BAD_GATEWAY.html.var
#    ErrorDocument 503 /error/HTTP_SERVICE_UNAVAILABLE.html.var
#    ErrorDocument 506 /error/HTTP_VARIANT_ALSO_VARIES.html.var


# Include of directories ignores editors' and dpkg's backup files,
# see README.Debian for details.

# Include generic snippets of statements
Include /etc/apache2/conf.d/

# Include the virtual host configurations:
Include /etc/apache2/sites-enabled/
Include /etc/phpmyadmin/apache.conf
Include /etc/cacti/apache.conf

root@SQUID:/etc/cacti# /etc/init.d/apache2 restart
 * Restarting web server apache2                                                                                                                                 [Mon Apr 15 13:40:57 2013] [warn] The Alias directive in /etc/phpmyadmin/apache.conf at line 3 will probably never match because it overlaps an earlier Alias.
[Mon Apr 15 13:40:57 2013] [warn] The Alias directive in /etc/cacti/apache.conf at line 1 will probably never match because it overlaps an earlier Alias.
 ... waiting [Mon Apr 15 13:40:58 2013] [warn] The Alias directive in /etc/phpmyadmin/apache.conf at line 3 will probably never match because it overlaps an earlier Alias.
[Mon Apr 15 13:40:58 2013] [warn] The Alias directive in /etc/cacti/apache.conf at line 1 will probably never match because it overlaps an earlier Alias.
                                                                                                                                                          [ OK ]