Github is the best thing in over web development for me. There are so many other Git hosting available like BitBucket and Gitlab. Github saves your...
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You are mixing Git and Github...
Those above are git commands, not github.
It's like a wrench (git) and a shelf where you keep wrenches(github).
Thanks to wrench you can do some things.
Does a shelf can do the same things?
Also, you are tied to github as a only site which hosts repositories.
There is much more than that like bitbucket or gitlab