dantunes

$ git add . # add to index only files created or modified and not those deleted 
$ git add -u # add to index only files modified or deleted and not those created 
$ git add -A # do both operation at once, add to index all files 

dantunes

#Unstage a single file from the "about to be commited"
git reset filename.txt

#Unstage a "git add ."
git reset