Dialog is a utility that provides dialog boxes from shell scripts, you may have seen them in aptitude during upgrades. When i use Emacs shell (
M-x shell) and type
sudo aptitude safe-upgrade, i get the following error several times:
debconf: unable to initialize frontend: Dialog debconf: (Dialog frontend will not work on a dumb terminal, an emacs shell buffer, or without a controlling terminal.) debconf: falling back to frontend: Readline
Why doesn't Dialog work with Emacs shell? And should i use some substitute?