dpkg --force-all --purge libpam-runtime
dpkg: libpam-runtime: dependency problems, but removing anyway as you requested:
 cron depends on libpam-runtime (>= 1.0.1-11).
 login depends on libpam-runtime.
 openssh-server depends on libpam-runtime (>= 0.76-14).
 ubuntu-core-config depends on libpam-runtime (>= 1.0.1-6).
 at depends on libpam-runtime (>= 1.0.1-11).
 ppp depends on libpam-runtime.
 libpam-cap:amd64 depends on libpam-runtime (>= 1.1.3-2~).
 libpam-systemd:amd64 depends on libpam-runtime (>= 1.0.1-6).
 dovecot-core depends on libpam-runtime (>= 0.76-13.1).

(Reading database ... 261535 files and directories currently installed.)
Removing libpam-runtime (1.1.8-3.7) ...
Purging configuration files for libpam-runtime (1.1.8-3.7) ...
dpkg: warning: while removing libpam-runtime, directory '/var/lib/pam' not empty so not removed
Processing triggers for man-db (2.8.3-2) ...
[9x]::[09:34 PM]:[/]
[root@rescue]$dpkg --force-all --purge libpam-modules
dpkg: libpam-modules:amd64: dependency problems, but removing anyway as you requested:
 login depends on libpam-modules (>= 1.1.8-1); however:
  Package libpam-modules:amd64 is to be removed.
 openssh-server depends on libpam-modules (>= 0.72-9).
 passwd depends on libpam-modules.
 sudo depends on libpam-modules.
 ppp depends on libpam-modules.

(Reading database ... 261433 files and directories currently installed.)
Removing libpam-modules:amd64 (1.1.8-3.7) ...
Purging configuration files for libpam-modules:amd64 (1.1.8-3.7) ...
Processing triggers for man-db (2.8.3-2) ...
[9x]::[09:34 PM]:[/]
[root@rescue]$rm -rf /etc/pam.d
[9x]::[09:34 PM]:[/]
[root@rescue]$rm -rf /lib/security
[9x]::[09:34 PM]:[/]
[root@rescue]$apt install libpam-runtime libpam-modules
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 libpam-modules : PreDepends: libpam-modules-bin (= 1.1.8-3.6ubuntu2)
                  Recommends: update-motd but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
[9x]::[09:34 PM]:[/]
[root@rescue]$apt --fix-broken install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  asterisk-config asterisk-core-sounds-en asterisk-core-sounds-en-gsm
  asterisk-modules asterisk-moh-opsound-gsm dctrl-tools freetds-common
  galera-3 gnupg-l10n gnupg-utils gpg-agent gpg-wks-server gpgsm
  i965-va-driver kpackagetool5 ktorrent-data kwayland-data
  kwayland-integration liba52-0.7.4 libaacs0 libaccountsservice0 libapparmor1
  libaribb24-0 libass9 libavahi-core7 libavahi-glib1 libavcodec57
  libavformat57 libavutil55 libbasicusageenvironment1 libbdplus0 libbluray2
  libcddb2 libchromaprint1 libcryptsetup12 libcrystalhd3 libdaemon0 libdaq2
  libdbusmenu-qt5-2 libdc1394-22 libdca0 libdvbpsi10 libdvdnav4 libdvdread4
  libebml4v5 libecap3 libecpg-compat3 libecpg-dev libecpg6 libexttextcat-2.0-0
  libexttextcat-data libfaad2 libfam0 libgme0 libgmime-3.0-0 libgpgme11
  libgpgmepp6 libgroupsock8 libhfstospell9 libiksemel3 libkate1 libkf5archive5
  libkf5attica5 libkf5auth-data libkf5bookmarks-data libkf5codecs-data
  libkf5codecs5 libkf5completion-data libkf5completion5 libkf5config-bin
  libkf5config-data libkf5configcore5 libkf5configgui5
  libkf5configwidgets-data libkf5coreaddons-data libkf5coreaddons5
  libkf5crash5 libkf5dbusaddons-bin libkf5dbusaddons-data libkf5dbusaddons5
  libkf5declarative-data libkf5dnssd-data libkf5dnssd5 libkf5doctools5
  libkf5globalaccel-bin libkf5globalaccel-data libkf5globalaccel5
  libkf5globalaccelprivate5 libkf5guiaddons5 libkf5i18n-data libkf5i18n5
  libkf5iconthemes-data libkf5idletime5 libkf5itemviews-data libkf5itemviews5
  libkf5jobwidgets-data libkf5jobwidgets5 libkf5kcmutils-data libkf5kiocore5
  libkf5kiontlm5 libkf5krosscore5 libkf5notifications-data
  libkf5notifications5 libkf5notifyconfig-data libkf5package-data
  libkf5package5 libkf5parts-data libkf5plotting5 libkf5service-bin
  libkf5service-data libkf5service5 libkf5solid5 libkf5solid5-data
  libkf5sonnet5-data libkf5sonnetcore5 libkf5sonnetui5 libkf5textwidgets-data
  libkf5wallet-data libkf5wallet5 libkf5waylandclient5
  libkf5widgetsaddons-data libkf5widgetsaddons5 libkf5windowsystem-data
  libkf5windowsystem5 libkf5xmlgui-bin libkf5xmlgui-data libksba8
  libkwalletbackend5-5 liblirc-client0 liblivemedia62 liblua5.1-0
  libmatroska6v5 libmbim-glib4 libmbim-proxy libmicrodns0 libmm-glib0
  libmpcdec6 libmpeg2-4 libmtp-common libmtp-runtime libmtp9 libneon27-gnutls
  libnfs11 libnpth0 libntfs-3g88 libodbc1 libopenjp2-7 libopenmpt-modplug1
  libopenmpt0 libpgtypes3 libphonon4qt5-4 libpj2 libpjlib-util2 libpjmedia2
  libpjnath2 libpjsip-simple2 libpjsip-ua2 libpjsip2 libplacebo4 libplymouth4
  libpolkit-agent-1-0 libpolkit-gobject-1-0 libpostproc54 libproxy-tools
  libpulse-mainloop-glib0 libqca-qt5-2 libqca-qt5-2-plugins libqmi-glib5
  libqmi-proxy libqt5script5 libqt5texttospeech5 libqt5x11extras5 libradcli4
  libresample1 libresid-builder0c2a libshine3 libsidplay2 libsoxr0 libspandsp2
  libspeexdsp1 libsqlite0 libsrtp2-1 libssh-gcrypt-4 libssl-doc libswresample2
  libswscale4 libsybdb5 libupnp6 liburiparser1 libusageenvironment3 libva-drm2
  libva-wayland2 libva-x11-2 libva2 libvdpau1 libvlc-bin libvlc5 libvlccore9
  libvo-amrwbenc0 libvoikko1 libvulkan1 libwebpmux3 libx264-152 libx265-146
  libxcb-xv0 libxvidcore4 libzvbi-common libzvbi0 mariadb-server-core-10.1
  mesa-va-drivers mesa-vdpau-drivers modemmanager oinkmaster phonon4qt5
  phonon4qt5-backend-vlc pinentry-curses procmail python-dbus python3-exabgp
  python3-yaml snort-common-libraries sonnet-plugins squashfs-tools
  squid-common squid-langpack sysstat torsocks usb-modeswitch
  usb-modeswitch-data va-driver-all vdpau-driver-all vlc-data vlc-plugin-base
  vlc-plugin-video-output xauth
Use 'apt autoremove' to remove them.
The following additional packages will be installed:
  anacron
Suggested packages:
  default-mta | mail-transport-agent
Recommended packages:
  cron | cron-daemon
The following packages will be REMOVED:
  accountsservice adduser apt apt-utils asterisk asterisk-voicemail at
  avahi-daemon bluez chkrootkit cron dbus dirmngr dovecot-core dovecot-imapd
  dovecot-pop3d exabgp friendly-recovery fuse geoclue-2.0 gnupg gpg-wks-client
  ifupdown iio-sensor-proxy init initramfs-tools initramfs-tools-core kinit
  kio kpackagelauncherqml kross ktorrent language-selector-common
  libgeoclue-2-0 libkf5auth5 libkf5bookmarks5 libkf5configwidgets5
  libkf5declarative5 libkf5iconthemes-bin libkf5iconthemes5 libkf5kcmutils5
  libkf5kiofilewidgets5 libkf5kiowidgets5 libkf5krossui5 libkf5notifyconfig5
  libkf5parts-plugins libkf5parts5 libkf5quickaddons5 libkf5syndication5
  libkf5textwidgets5 libkf5wallet-bin libkf5webkit5 libkf5xmlgui5
  libktorrent-l10n libktorrent6 libnss-mdns libnss-systemd libpam-cap
  libpam-modules-bin libpam-systemd libpolkit-qt5-1-1
  linux-image-3.2.0-23-generic login mariadb-server mariadb-server-10.1 mdadm
  media-player-info mlocate netplan.io nplan ntfs-3g openssh-client
  openssh-server openssh-sftp-server passwd plymouth
  plymouth-theme-ubuntu-text postfix postgresql postgresql-10 postgresql-all
  postgresql-common postgresql-plperl-10 postgresql-plpython-10
  postgresql-plpython3-10 postgresql-pltcl-10 postgresql-server-dev-10
  postgresql-server-dev-all ppp pppconfig pppoeconf python-keyring
  python-secretstorage python3-keyring python3-secretstorage snapd snort
  snort-common snort-rules-default squid squid3 ssh-import-id ssl-cert
  stunnel4 sudo systemd systemd-sysv tor tor-geoipdb ubuntu-core-config
  ubuntu-core-launcher ubuntu-core-libs ubuntu-minimal ubuntu-standard udev
  uuid-runtime wpasupplicant
The following NEW packages will be installed:
  anacron
WARNING: The following essential packages will be removed.
This should NOT be done unless you know exactly what you are doing!
  apt adduser (due to apt) init systemd-sysv (due to init) login
0 upgraded, 1 newly installed, 117 to remove and 0 not upgraded.
Need to get 26.3 kB of archives.
After this operation, 444 MB disk space will be freed.
You are about to do something potentially harmful.
To continue type in the phrase 'Yes, do as I say!'
 ?] n
Abort.
[9x]::[09:36 PM]:[/]