learn git command

git init
git add filename
git commit -m “text”
git log
git reflog
git reset –hard commit_ID
git status

查看commit之前的改动
git diff a_version
git checkout – filename

drop change
git reset HEAD filename

the other way to drop change
git rm filename

‘git rm’ means remove a file.
git clone
git push
git pull
git branch

show all branch
git branch branch_name
git checkout branch_name
git checkout -b branch_name

build a new branch and switch to new branch
git merge branch_name

merge a branch with present branch
git branch -d branch_name

delete a branch
git branch -D branch_name

force delete a branch
git revert version_name
git stash
git stash pop

you can use ‘git stash’ command to temporary storage your work and fix a bug. After the bug has be fixed,you can use ‘git stash pop’ to continue you work.