https://www.youtube.com/watch?v=GK8R3SjG3B4&list=PLuHgQVnccGMA8iwZwrGyNXCGy2LAAsTXk&index=21 ================================================================================ Create repository (which has .git) in current directory git init vim f1.txt git add f1.txt git commit -m "1" ================================================================================ vim f1.txt git commit -am "2" File which is not performed "add" is not performed by automatic "add" ================================================================================ git log ================================================================================ git branch ================================================================================ git branch exp ================================================================================ git branch ================================================================================ git checkout exp git branch ================================================================================ git log ================================================================================ Currently, master branch = exp branch ================================================================================ vim f1.txt git add f1.txt git commit m "3" ================================================================================ git log ================================================================================ git checkout master git log ================================================================================ cat f1.txt ================================================================================ git checkout exp ================================================================================ git log ================================================================================ cat f1.txt