Command Line and Scripting

Start emacs ignoring the file:~/.emacs.d/init.el or file:~/.emacs configuration file.

$ emacs --no-init-file

or

$ emacs -q

Start Emacs with a custom configuration file:

$ emacs -q -l customstart.el

Debug Emacs configuration file: ~/.emacs.d/init.el or ~/.emacs

$ emacs  --debug-init

To keep multiple configurations files see: Emacs Bootstrap Show Emacs version

$ emacs --version