root@ucs-pdn:~# apt purge ntp
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  bc containerd dmeventd docker-compose heimdal-kdc heimdal-servers libaio1 libdevmapper-event1.02.1 libkdc2-heimdal liblvm2cmd2.03 libopts25 libpam-univentionmailcyrus lvm2
  netcat-openbsd nfs-kernel-server openbsd-inetd pass php php-cgi php-cli php-common php-curl php-krb5 php-ldap php-memcache php-xml php7.3 php7.3-cgi php7.3-cli php7.3-common
  php7.3-curl php7.3-json php7.3-ldap php7.3-opcache php7.3-readline php7.3-xml postgresql-client-11 postgresql-client-common python-genshi python-mimeparse python-pygresql
  python-reportlab python-reportlab-accel python-ruamel.yaml python-trml2pdf python-univention-directory-manager-rest python-univention-directory-reports python-univention-pkgdb
  python-uritemplate python3-cached-property python3-click python3-colorama python3-docker python3-dockerpty python3-docopt python3-genshi python3-jsonschema python3-mimeparse
  python3-pygresql python3-reportlab python3-reportlab-accel python3-ruamel.yaml python3-texttable python3-trml2pdf python3-univention-directory-manager-rest
  python3-univention-directory-reports python3-univention-pkgdb python3-univention-portal python3-uritemplate python3-websocket runc simplesamlphp stunnel4 tcpd tree
  univention-directory-manager-rest univention-directory-notifier univention-directory-reports univention-firewall univention-heimdal-kdc univention-initrd
  univention-ldap-acl-master univention-ldap-config-master univention-license-import univention-mail-postfix univention-maintenance univention-management-console-module-ipchange
  univention-management-console-module-udm univention-management-console-module-welcome univention-nfs-server univention-pkgdb-tools univention-portal univention-role-common
  univention-saml univention-server-overview update-inetd
Use 'apt autoremove' to remove them.
The following packages will be REMOVED:
  cgroupfs-mount* docker.io* ntp* python-univention-appcenter-docker* python3-univention-appcenter-docker* univention-appcenter-docker* univention-bind* univention-docker*
  univention-role-server-common* univention-server-master*
0 upgraded, 0 newly installed, 10 to remove and 0 not upgraded.
After this operation, 195 MB disk space will be freed.