This guide provides instructions specific to Ubuntu 14.04. You need SSH with root access.

FULL INSTRUCTIONS

1. Update your system

Run this code via SSH and make sure that everything is up-to-date:

# sudo apt-get update

# sudo apt-get dist-upgrade

If you don't have a CURL, just install it:

# sudo apt-get install curl

2. Download and install VestaCp

Now use the following command:

# curl -O  http://vestacp.com/pub/vst-install.sh 

Run this installation script:

# bash vst-install.sh

# bash vst-install-ubuntu.sh --force

That's it, wait some time you will get the Vesta login details.