Sorry ryecoaaron but if I try to purge isc-dhcp-client package I see this:
Code
gianpaolo@omv:~$ sudo apt-get -s purge isc-dhcp-client
[sudo] password for gianpaolo:
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
acl avahi-daemon beep bsdmainutils btrfs-progs cifs-utils collectd collectd-core cpufrequtils cron-apt davfs2
dconf-gsettings-backend dconf-service dmeventd dnsmasq-base docutils-common f2fs-tools fail2ban gdisk genisoimage
gir1.2-freedesktop gir1.2-glib-2.0 gir1.2-libosinfo-1.0 glib-networking glib-networking-common glib-networking-services
gsettings-desktop-schemas hdparm ieee-data imagemagick-6-common ipxe-qemu iso-codes jfsutils jq ksmtuned libaio1
libarchive-zip-perl libarchive13 libavahi-client3 libavahi-common-data libavahi-common3 libavahi-core7 libbrlapi0.8
libcacard0 libcapstone4 libcpufreq0 libcups2 libdaemon0 libdaxctl1 libdbi1 libdconf1 libde265-0 libdevmapper-event1.02.1
libdw1 libexecs0 libfdt1 libgd3 libgeoip1 libgirepository-1.0-1 libgstreamer-plugins-base1.0-0 libgstreamer1.0-0 libheif1
libhiredis0.14 libibverbs1 libimagequant0 libinih1 libjq1 libjs-sphinxdoc libjs-underscore libjson-glib-1.0-0
libjson-glib-1.0-common liblcms2-2 libldb2 liblqr-1-0 liblvm2cmd2.03 liblzo2-2 libmagic-mgc libmagic1 libmagickcore-6.q16-6
libmagickwand-6.q16-6 libmemcached11 libmemcachedutil2 libndctl6 libneon27 libnetplan0 libnginx-mod-http-geoip
libnginx-mod-http-image-filter libnginx-mod-http-xslt-filter libnginx-mod-mail libnginx-mod-stream
libnginx-mod-stream-geoip libnl-3-200 libnl-genl-3-200 libnl-route-3-200 libnspr4 libnss-mdns libnss-myhostname libnss3
libntfs-3g883 libnutscan1 libonig5 liborc-0.4-0 libosinfo-1.0-0 libosinfo-bin libossp-uuid16 libpcap0.8 libpcsclite1
libpmem1 libproxy1v5 libpython3.9 librdmacm1 librrd8 libslirp0 libsnmp-base libsnmp40 libsoup2.4-1 libspice-server1
libssh-4 libtalloc2 libtdb1 libtevent0 libtpms0 libupsclient4 liburing1 libusb-0.1-4 libusbredirparser1 libvdeplug2
libvirt-clients libvirt-daemon libvirt-daemon-config-network libvirt-daemon-config-nwfilter libvirt-daemon-driver-qemu
libvirt-daemon-system libvirt-daemon-system-systemd libvirt0 libwbclient0 libwebpdemux2 libxencall1 libxendevicemodel1
libxenevtchn1 libxenforeignmemory1 libxengnttab1 libxenhypfs1 libxenmisc4.14 libxenstore3.0 libxentoolcore1 libxentoollog1
libxslt1.1 libyajl2 lsof lsscsi lvm2 mergerfs monit ncal netcat-openbsd netplan.io nginx nginx-common nginx-core novnc
ntfs-3g nut nut-client nut-server osinfo-db osinfo-db-tools ovmf php-bcmath php-cgi php-common php-fpm php-imagick
php-libvirt-php php-mbstring php-pam php-xml php-yaml php7.4-bcmath php7.4-cgi php7.4-cli php7.4-common php7.4-fpm
php7.4-json php7.4-mbstring php7.4-opcache php7.4-readline php7.4-xml proftpd-basic proftpd-core proftpd-mod-crypto
proftpd-mod-vroot proftpd-mod-wrap python-apt-common python3-apt python3-cached-property python3-dbus python3-debtcollector
python3-dialog python3-dnspython python3-docutils python3-gi python3-iso8601 python3-jinja2 python3-jwcrypto python3-ldb
python3-libvirt python3-libxml2 python3-lxml python3-markupsafe python3-natsort python3-netaddr python3-netifaces
python3-novnc python3-numpy python3-oslo.config python3-oslo.context python3-oslo.i18n python3-oslo.log
python3-oslo.serialization python3-oslo.utils python3-pbr python3-pil python3-polib python3-pycryptodome python3-pyinotify
python3-pyudev python3-rfc3986 python3-roman python3-samba python3-stevedore python3-systemd python3-talloc python3-tdb
python3-tz python3-websockify python3-wrapt python3-yaml python3-zmq qemu qemu-efi qemu-efi-aarch64 qemu-efi-arm
qemu-system-arm qemu-system-common qemu-system-data qemu-system-mips qemu-system-ppc qemu-system-x86 qemu-utils quota
quotatool rrdcached rrdtool rsync salt-common salt-minion samba samba-common samba-common-bin samba-libs samba-vfs-modules
sdparm seabios sgml-base smartmontools snapraid snmpd spice-html5 sshpass swtpm swtpm-libs swtpm-tools tdb-tools usb.ids
uuid virtinst websockify whois wpasupplicant wsdd xfsprogs xml-core xmlstarlet
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
isc-dhcp-client* openmediavault* openmediavault-borgbackup* openmediavault-diskstats* openmediavault-fail2ban*
openmediavault-kernel* openmediavault-kvm* openmediavault-mergerfs* openmediavault-nut* openmediavault-omvextrasorg*
openmediavault-remotemount* openmediavault-sharerootfs* openmediavault-snapraid* openmediavault-snmp*
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I'd rather avoid doing that