BASH Programming - Introduction HOW-TO
by Mike G mikkey at dynamo.com.ar
http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html
Bash scripting cheatsheet
https://devhints.io/bash
Bash scripting for beginning system administrators
A hands-on approach
https://www.ibm.com/developerworks/aix/library/au-getstartedbash/
适合系统管理新手的 bash 脚本编程
动手实践方法
https://www.ibm.com/developerworks/cn/aix/library/au-getstartedbash/index.html
Bash by example, Part 1
Fundamental programming in the Bourne again shell (bash)
https://www.ibm.com/developerworks/library/l-bash/index.html
Bash 实例，第一部分
Bourne again shell (bash) 基本编程
https://www.ibm.com/developerworks/cn/linux/shell/bash/bash-1/
Bash by example, Part 2
More bash programming fundamentals
https://www.ibm.com/developerworks/linux/library/l-bash2/index.html
Bash 实例，第 2 部分
更多的 bash 基本编程
https://www.ibm.com/developerworks/cn/linux/shell/bash/bash-2/
Bash by example, Part 3
Exploring the ebuild system
https://www.ibm.com/developerworks/library/l-bash3/index.html
Bash 实例，第 3 部分
探讨 ebuild 系统
https://www.ibm.com/developerworks/cn/linux/shell/bash/bash-3/
Bash 脚本 set 命令教程
http://www.ruanyifeng.com/blog/2017/11/bash-set.html