Improved error text and return code
Improved error text and return code

It nows shouts a pretty error to the user and also returns 127 (command
not found).

Signed-off-by: Rafael Campos Nunes <42f0a9af43f2538fd3153aecc7c3ff958e89d724@engineer.com>

rafaelcn/dotfiles,rafaelcn/Linux-setup