What is git ? A command and a version control system

What is github ? An online platform to host our code

Are git and github the same thing ? No

On git, which command allows me to save my latest updates git push

On git, do i need to choose which updated files i want to stage(save), before making a commit ? Yes

To mount(upload) my code(a commit) from my machine to github, which git command should i use ? git push

Which git command allows me to view the history of my commits ? git checkout-my-history

To jump into another git branch or commit, which command should i use ? git checkout

Is it a good practice to change my code on github ? No

If my coworker updates the code on github, which operation do i need to do first before pushing more code updates ? git update my_branch