Bdtyktl

There is

apt-get -o Dpkg::Options::="--force-confnew"

and

apt-get -o Dpkg::Options::="--force-confold"

and many more.

How can I get a list of all Dpkg::Options and their currently set values?

Unfortunately, apt-config dump doesn't list the dpkg options you were looking for. man dpkg helped me find this command, --force-help, which is more specific to the particular dpkg force options you were interested in, but not a comprehensive list of options:

$ dpkg --force-help

dpkg forcing options - control behaviour when problems found:

  warn but continue:  --force-<thing>,<thing>,...

  stop with error:    --refuse-<thing>,<thing>,... | --no-force-<thing>,...

 Forcing things:

  [!] all                Set all force options

  [*] downgrade          Replace a package with a lower version

      configure-any      Configure any package which may help this one

      hold               Process incidental packages even when on hold

      not-root           Try to (de)install things even when not root

      bad-path           PATH is missing important programs, problems likely

      bad-verify         Install a package even if it fails authenticity check

      bad-version        Process even packages with wrong versions

      overwrite          Overwrite a file from one package with another

      overwrite-diverted Overwrite a diverted file with an undiverted version

  [!] overwrite-dir      Overwrite one package's directory with another's file

  [!] unsafe-io          Do not perform safe I/O operations when unpacking

  [!] confnew            Always use the new config files, don't prompt

  [!] confold            Always use the old config files, don't prompt

  [!] confdef            Use the default option for new config files if one

                         is available, don't prompt. If no default can be found,

                         you will be prompted unless one of the confold or

                         confnew options is also given

  [!] confmiss           Always install missing config files

  [!] confask            Offer to replace config files with no new versions

  [!] architecture       Process even packages with wrong or no architecture

  [!] breaks             Install even if it would break another package

  [!] conflicts          Allow installation of conflicting packages

  [!] depends            Turn all dependency problems into warnings

  [!] depends-version    Turn dependency version problems into warnings

  [!] remove-reinstreq   Remove packages which require installation

  [!] remove-essential   Remove an essential package



WARNING - use of options marked [!] can seriously damage your installation.

Forcing options marked [*] are enabled by default.

Can be done using.

apt-config dump