gdebi lets you install local deb packages resolving and installing its dependencies. apt does the same, but only for remote (http, ftp) located packages.
-h, --help
Show this help message and exit.
--n, --non-interactive
Run non-interactive (dangerous!).
--auto-close
Auto close when the install is finished.
--datadir=DATADIR
Use alternative datadir.
-r, --remove
Remove selected package.
