Git file

In a local repository.

1. add first.txt to repository, use Git bash

$ git add first.txt

2. commit change

$ git commit -m 'my first commit'

3. check content change

$ git diff first.txt

4. commit change

$ git commit -m 'my second commit'

5. remove a file

$ git rm Documentation/\*.txt

6. test if the file exists and can be removed

$ $ git rm -n aa.txt

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7. Revert the changes specified by the fourth last commit in HEADand create a new commit with the reverted changes.

git revert HEAD~3

8.revert a commit

git revert 64158c6f740083d89b25575c82e2413548e1a5f0