SublimeText is a versatile text editor and is one of the best in business. However, one very big issue with it is, if there is a newer release the older version of the software would no longer be available for you to use. Yes, it stops working and gives a message saying: “This build of SublimeText has expired, please update to a newer one”. Except for this one glitch I absolutely love this editor.
Here are few ways you can install it on Ubuntu:
Using WebUpd8 PPA:
If you’ve used Sublime Text 2 PPA earlier, the old Sublime Text 2 package will be replaced with the new Sublime Text 3.

To add the WebUpd8 Sublime Text 3 (beta) PPA and install the application in Ubuntu 13.10, 13.04, 12.10 or 12.04 (and derivatives), use the following commands:

sudo add-apt-repository ppa:webupd8team/sublime-text-3
sudo apt-get update
sudo apt-get install sublime-text-installer

Using the deb package:
Download the deb from the following location:
http://www.sublimetext.com/3

Install using the following commands:

sudo dpkg -i [Your_Location.DEB_PACKAGE]