You can check version of Ubuntu you are running either by checking System Information or using Command Line.
- Using System Information
Open Dash home, and search for System Info. In System Info dialogue, Ubuntu version number is given below the logo of Ubuntu in the right part of dialogue.
- Using Command line (Terminal)
Open Terminal and type in the following command and press Enter, which will print Distribution Specific Information of the operating system you are having
How To Check Whether Your Computer Is Running 32-Bit Version Or 64-Bit Version Of Windows 7 How To Change User Account Password in Ubuntu How To Check Which DirectX Version Is Installed In Your Windows How To Determine Which .NET Framework Version Is Installed How to Print a List of Items Present in a Windows 7 Folder