In term of installation, Ajenti really win. All available as OS packages, so if using Ubuntu or Debian it just a matter of apt-get. The initial installation is covered by a script that you download from Ajenti's website.
wget -O- https://raw.github.com/ajenti/ajenti/1.x/scripts/install-ubuntu.sh | sudo shOne thing that tripped me up is that I thought the web hosting plugins also in the same packages. Turn out it a separate package called ajenti-v (It clearly shown on the website, so my bad). To get the webhosting packages you need to install ajenti-v package.
sudo apt-get install ajenti-v ajenti-v-nginx ajenti-v-mysql ajenti-v-php-fpm php5-mysql ajenti-v-python-gunicorn
There's a subtle difference between root and alias.