How to use command line on macOS

A friend of mine (who used to use Windows) has bought a Mac recently and he asked me how to use the command line on macOS:

My answer was:

• 99% of commands are identical in Linux. This is good news as there are a lot of material about it available on the Internet;
• Terminal.app from macOS is cool, but it's not perfect. I (and 90% of developers I know) use iTerm2 (http://iterm2.com/). It's light (3mb), free, open-source, has a better interface than the native one and it rocks! Best terminal I've ever used.
• This is the most useful topic in my answer: an awesome cheat-sheet with command line commands made by the Git-tower team;
• To finish: I've recorded a screencast (in Portuguese) explaining how to create scripts on macOS and Linux (similar to BAT files on Windows).: