2023 Boost - Week 20#

How can I match a partial or substring in shell/bash?
What is "parameter expansion" and how does it differ in shell/bash?
How do I force a string into all lower/upper case?
How do I clear the screen?
How do I capture the output of a command into a variable?
How can I translate/convert characters in a string?
How are ASCII characters ordered?
What is the difference between a "letter", "character", and a "rune"?
How do "pattern matching" and "regular expressions" differ?
How do I match a single character in "pattern matching"?
How do I match zero or more characters in "pattern matching"?
How do I match a range of characters in "pattern matching"?
How do I match a class of characters in "pattern matching"?
How do I negate a range in "pattern matching"?
How do I use regular expressions with shell/bash?