file1.txt.txt

git init
git status 
git add <file path>
git rm --cached <file path>
git diff #check the difference between modified and staged file or previous commit
git checkout -- <file path> #undo the previous commit, or unstage 
git checkout [-p] -- <file path> #[-p] lets you discard changes by parts (doesn't work very well sometimes)
git commit --ammend -m "commit message" #ammending commit message 
git log [--oneline | --graph] --all #show commit history 

git reset -- [mixed | soft | hard] [HEAD~n | commit hash] #mixed is a default option; HEAD~n choose how many commit to move back; commit hash is go back using hash code
git reset sdf