apt-get install aptitude
aptitude update
aptitude full-upgrade
reboot
aptitude install nano
Set-up the Repo Sources
nano /etc/apt/sources.list
# Debain Main Update
deb http://ftp.de.debian.org/debian stable main contrib non-free
deb-src http://ftp.de.debian.org/debian stable main contrib non-free
deb http://ftp.debian.org/debian/ wheezy-updates main contrib non-free
deb-src http://ftp.debian.org/debian/ wheezy-updates main contrib non-free
deb http://security.debian.org/ wheezy/updates main contrib non-free
deb-src http://security.debian.org/ wheezy/updates main contrib non-free
#Debian Backport
deb http://ftp.debian.org/debian/ wheezy-backports main
#Dotdeb.org
deb http://packages.dotdeb.org wheezy all
deb-src http://packages.dotdeb.org wheezy all
#Dotdeb.org php 5.5
deb http://packages.dotdeb.org wheezy-php55 all
deb-src http://packages.dotdeb.org wheezy-php55 all
wget http://www.dotdeb.org/dotdeb.gpg
apt-key add dotdeb.gpg
aptitude update
aptitude full-upgrade
reboot
Install MySQL / Apache / PHP
aptitude install mysql-server mysql-client
/usr/bin/mysqladmin -u root password 'enter-your-good-new-password-here' (Not always needed only if it didn't ask for a password)
aptitude install apache2 apache2.2-common apache2-doc apache2-mpm-prefork apache2-utils #### APACHE
aptitude install php5 php5-fpm libapache2-mod-php5 php5-mysql php5-curl php5-gd php5-intl php-pear php5-imagick php5-imap php5-mcrypt php5-ming php5-ps php5-pspell php5-recode php5-snmp php5-sqlite php5-tidy php5-xmlrpc php5-xsl #### PHP
aptitude install curl perl libapache2-mod-perl2 python libapache2-mod-python fail2ban phpmyadmin ntp ntpdate #### Extras
Test PHP
a2enmod rewrite
a2enmod include
Next Step
service apache2 restart
cd /var/www/ and upload the Blesta files there.