guide source

https://www.liaoxuefeng.com
this is best guide i found.

step one: install git

...

step two: config

git config -- global user.name "XX"
git config -- global user.email "XXX"

step three: create repository

mkdir learngit
cd learngit
git init

add file to repository

touch test.txt
git add test.txt
git commit -m "add test.txt"