Fix a debian package's maintainer scripts

debian ubuntu deb deb-package preinst postinst prerm

Source

• https://unix.stackexchange.com/a/138190

• unpack the .deb archive to a temporary directory

  mkdir tmp
  sudo dpkg-deb -R my-package.deb tmp

• edit the scripts inside the temporary directory

• optionally: fix the permissions on the maintainer scripts to be >=0555 and <=0755, e.g.

  sudo chmod 0755 tmp/DEBIAN/preinst

• package the files in the temporary directory into a .deb archive again

  sudo dpkg-deb -b tmp my-package-fixed.deb

• then simply install the fixed package as usual

  sudo apt-get install ./my-package-fixed.deb