Up until now I mostly used Windows and Mac, but due to work I need to pick up Ubuntu 14.04 in a short period of time. Could anyone suggest an introductory book on Ubuntu which assumes none or very little pre-knowledge, please? In particular, some basics to work in the terminal. Thank you!
Try this website which teaches you about linux commands which you will require at certain point. http://linuxcommand.org/
May I suggest Ubuntu for Dummies as a possibility for consideration?