These are a list of usages of shell commands I can't live without on UNIX-based systems.
Using Homebrew (yes, I am opinionated) you can install the following tools with the following packages:
#Introduction to Devops Resources:
##Chapter 1
2015 State of DevOps Report https://puppet.com/resources/white-paper/2015-state-of-devops-report
Knight Capital https://en.wikipedia.org/wiki/Knight_Capital_Group