git init
git config --global user.name 'Brad Traversy'
git config --global user.email 'me@bradtraversy.com'
git add index.html
git status
git rm --cached index.html    //remove
git add *.html    // all the html file
git add .   //all the files
git commit    //vim editor be opened 
git commit -m 'Changed app.jus'
touch .gitignore     //Just write filename and prevent the file to go to staging area.

log.txt
/dir2

git branch login
git chechout login    // Switch the branch
touch login.html
git add .
git commit -m "login form"
git checkout master
# The login.html file is gone, because you are in master branch, not in login branch!
git merge login
git remote add origin https://github.com/bradtraversy/myappsample.git
git remote   // See the remote repos
git push -u origin master
touch README.md
git add .
git commit -m "Added readme"
git push

git pull  //up-to-date

git branch -d <branch name> //delete a branch

//It lists the shortnames of each remote handle you’ve specified
git remote -v //See the connected repo

git remote add {shortName} {url} //Change the connected repo
git remote add origin git@github.com:sammy/my-new-project.git // origin is the default name git gives to a remote server

git push --mirror https://github.com/exampleuser/new-repository.git  // Duplicate
git remote set-url --push origin https://github.com/exampleuser/mirrored  // Change remote repository
// Update mirror
git fetch -p origin
git push --mirror

//git remote
git remote rm {name} //delete remote url

git push --all origin // all the branches at the same time to push

//git branch
git fetch --all //try this before git checkout --track origin/{branchname}
git checkout -t origin/test  //get remote branch origin/test if there is no test branch on local machine.
git reset --hard  //discard local changes
git checkout {filename}  //discard specific local changes

git reset {filename} //remove file from staging area
git checkout -- {filename} // do not commit which is not on the staging area

// discard unstaged file changes
git stash save --keep-index --include-untracked
git stash drop

fatal: refusing to merge unrelated histories

git pull origin master --allow-unrelated-histories

git checkout {branch name}

// return "fatal: unknown index entry format 0x18610000"

del .git/index
git reset

git clone {url} {name}