Why does "sudo apt install rdnssd" remove 7 packages like network-manager etc.?
$ sudo apt install rdnssd
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libndp0 libpkcs11-helper1 libteamdctl0 mobile-broadband-provider-info
openvpn pptp-linux
Use 'sudo apt autoremove' to remove them.
Suggested packages:
ndisc6
The following packages will be REMOVED:
network-manager network-manager-config-connectivity-ubuntu
network-manager-gnome network-manager-openvpn network-manager-openvpn-gnome
network-manager-pptp network-manager-pptp-gnome
The following NEW packages will be installed:
rdnssd
0 upgraded, 1 newly installed, 7 to remove and 0 not upgraded.
Need to get 15,9 kB of archives.
After this operation, 10,7 MB disk space will be freed.
Do you want to continue? [Y/n] n
Abort.
1 Answer
Take a look at apt show rdnssd
Look for the Conflicts line:
Conflicts: network-manager
There's your answer: rdnssd and NetworkManager cannot exist on the same system simultaneously. They conflict.
FYI: Ubuntu Server and Ubuntu Core use systemd-networkd instead of NetworkManager. Unless you have bolted NM on, rdnssd should work well with those versions of Ubuntu.
