Learning Go as a Sysadmin/devops Person Coming From Bash

I've been working in the sysadmin/devops/cybersecurity domains. I came to Go from Bash/Perl/Python. It took me quite some time to get productive in Go but now I'm using Go (+ some Bash for smaller tasks) most of the time - for building tools, automation and platforms. I created a three-part series for people like me that could help them to start learning Go. This is the first part.