Here is a pile of helpful reference documents (not for beginners) dealing with bash.
# O'Reilly Bash Cookbook
- Authors: Carl Albing, JP Vossen, Cameron Newham
- Year: 2007
- Publisher: O'Reilly Media
- ISBN: 9780596526788
## Resources
- [Bash Cookbook Homepage](http://www.bashcookbook.com)
- [Code Examples](https://resources.oreilly.com/examples/9780596526788/)
- [Comprehensive List of Bash Reference Documentation and Examples](http://www.bashcookbook.com/bashinfo/)