Standard Ubuntu installation Guide for 14.04
Go to Download Ubuntu 14.04 The file size is just under a Gigabyte
To install Ubuntu, you must first put the installation image onto some form of media. Your choices are DVD or USB (the image has grown too large for most CDs). Most computers can boot from both, unless they lack a disc drive, in which case you can skip the next paragraph, as you'll be using a USB then.
For DVDs, RW means you can write new data again and again, whereas R means once the Ubuntu installation image is on there, there it will stay. It can be used again, but never written to again. As for + or -, + means a computer can treat it like a USB drive, whereas - is a little older and won't. Either + or -, and R or RW will work for this.USB sticks need to be at least 2GB in size, and be prepared for it to be formatted (everything deleted). We generally use the USB method here at IPConfigure.
Installing Ubuntu 14.04 Trusty Tahr
Turn your computer on, spam the Setup key to select a boot device when your screen shows the name of the manufacturer. This key is usually a Function key (F12), or something like ESC. It will be shown on the BIOS, the screen displaying the manufacturers logo, usually along the bottom labeled Setup or Boot Settings. You can then use the arrow keys, finally hitting enter, to select either USB or Disc Drive.
Follow the installation instructions in the following slides.
When you get to this menu press the escape key
On this screen you will press the F6 key and you will select “NOMODESET” as shown in the image below.
After will be brought to this screen. Choose "Install" Ubuntu
Make sure that you meet all the criteria noted with the green arrows. Also select the Download updates and install 3rd party software.
You will then need to enter in the following credentials and account info. When complete you will select continue.
Lastly for the installation process you will see this screen and it will display the progress. At the end it will ask you to reboot. Once the server has gotten to the restart point, remove the USB/DVD so it will boot to the newly installed OS.