emacs how to launch it

I recommande this way :

emacs -nw --no-splash

man emacs will tell you :

   -nw, --no-window-system
       Tell Emacs not to create a graphical frame.  If you use this switch when invoking  Emacs  from
       an xterm(1) window, display is done in that window.

   --no-splash
       Do not display a splash screen during start-up.

You can add this to your .bash_aliases

alias emacs='emacs -nw --no-splash'

And this to your .bashrc

export EDITOR='emacs -nw --no-splash'