git rm [file] deletes the file from your working directory and stages the deletion.
git log list the version history for the current branch.
git show [commit]
shows the metadata and content changes of the specified commit.
git tag [commitID]
used to give tags to the specified commit.
git checkout [branch name]
git checkout -b [branch name]
used to switch from one branch to another.
creates a new branch and also switches to it.