dpkg: warning: while removing directory not empty

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dpkg-preconfigure

DPKG-PRECONFIGURE(8)						      Debconf						      DPKG-PRECONFIGURE(8)

NAME

       dpkg-preconfigure - let packages ask questions prior to their installation

SYNOPSIS

	dpkg-preconfigure [options] package.deb

	dpkg-preconfigure --apt

DESCRIPTION

       dpkg-preconfigure lets packages ask questions before they are installed.  It operates on a set of debian packages, and all packages that
       use debconf will have their config script run so they can examine the system and ask questions.

OPTIONS

       -ftype, --frontend=type
	   Select the frontend to use.

       -pvalue, --priority=value
	   Set the lowest priority of questions you are interested in. Any questions with a priority below the selected priority will be ignored
	   and their default answers will be used.

       --terse
	   Enables terse output mode. This affects only some frontends.

       --apt
	   Run in apt mode. It will expect to read a set of package filenames from stdin, rather than getting them as parameters. Typically this
	   is used to make apt run dpkg-preconfigure on all packages before they are installed.  To do this, add something like this to
	   /etc/apt/apt.conf:

	    // Pre-configure all packages before
	    // they are installed.
	    DPkg::Pre-Install-Pkgs {
		   "dpkg-preconfigure --apt --priority=low";
	    };

       -h, --help
	   Display usage help.

SEE ALSO

       debconf(7)

AUTHOR

       Joey Hess <joeyh@debian.org>

								    2018-02-28						      DPKG-PRECONFIGURE(8)

Ubuntu