Learn Linux Shell Scripting - Fundamentals of Bash 4.4

Questions

1. What is a search pattern?
2. Why are regular expressions considered greedy?
3. Which character in search patterns is considered a wildcard for any one character, except newlines?
4. How is the asterisk used in Linux regular expression search patterns?
5. What are line anchors?
6. Name three character types.
7. What is globbing?
8. What is possible in extended regular expression syntax that is not possible with normal regular expressions under Bash?
9. What would be a good rule of thumb for deciding whether to use grep or sed?
10. Why are regular expressions on Linux/Bash so hard?