$ ./setup.sh
[ Enable git diff on VIM ]
$ git config --global diff.tool vimdiff
$ git config --global difftool.prompt false
[ Disable git diff on VIM ]
$ vi ~/.gitconfig
# Remove the below lines
[diff]
tool = vimdiff
[difftool]
prompt = false
[ Set alias of git command ]
$ git config --global alias.st status
[ Un-Set alias of git command ]
$ vi ~/.gitconfig
# Remove the below lines
[alias]
st = status