Finding out you OpenGL Version under Ubuntu
If you need to quickly find out the version of OpenGL you have along with the version of GLSL you can use then run the following at the command line.
glxinfo | grep -e "OpenGL.*version string"
Remember that if you have 2 graphics cards that you will need to be aware of which one it will be checking. For me that meant running:
optirun glxinfo | grep -e "OpenGL.*version string"
As I am using Bumblebee to enable use of the optimus graphics setup.