How do you delete files from local repository

How do you remove a number of deleted file(s) at one go?

Which command could be used to show what will be committed.

Which command pushes the commits to the master branch in the origin remote

What does "git add ." do?

What does the command `git add -A` do ?

How could you squash multiple commits together without using git merge --squash?

What option can you use to apply git configurations across your entire git environment?

Why would you use a pre-receive hook in your remote repository?

Why would the following command be used? Git rebase -i HEAD~10

You find a bug in your project, but can't locate where it was introduced in the commit history. How would you diagnose this problem?