create *.deb package:

create a directory which has the same like the *.deb package (example: test) and the other relevant directory (DEBIAN) and information fie (control) for creating of *.deb package

mkdir -p test/usr/bin/
mkdir -p test/DEBIAN
echo 'echo "hallo..!"' > test/usr/bin/test.sh
chmod a+x test/usr/bin/test.sh
nano test/DEBIAN/control

the file control should look like

Package: test Version: 1.0
Section: base
Priority: optional
Architecture: all
Depends: bash
Maintainer: ich < mail@ich.eu >
Description: test prog

and with

dpkg-deb --build test

you create your test.deb package