Keyboard shortcuts to navigate the command line in irb

Question

I've seen screencasts where users are running irb and as they write text they jump to the beginning/end of the line and beginning/end of words. What are the keystrokes used to do this? Does it depend on the shell that's being used?

Answer 1

Ctrl + A => Move to beginning of line
Ctrl + E => Move to end of line 

These are readline commands

Here is a cheatsheet you may find helpful in general