Practical Unix: Regular Expressions 2 - Wildcards and Indefinite Repetition
Channel: Sam King
Date: 2013-12-13

0:00 wildcards: . (dot) represents any character.
1:10 repetition: * will repeat the previous character 0 or more times.
1:47 lazy v greedy: * is greedy by default.  *? is lazy.
2:54 + (plus) repeats one or more.  + is greedy, and +? is lazy.