root@lp1877271-e:~# dpkg -l systemd|grep systemd
ii systemd 242-7ubuntu3.7 amd64 system and service manager
root@lp1877271-e:~# echo 1 > /proc/sys/net/ipv6/conf/eth0/disable_ipv6
root@lp1877271-e:~# ip -6 a show eth0
root@lp1877271-e:~# systemctl restart systemd-networkd
root@lp1877271-e:~# ip -6 a show eth0
root@lp1877271-e:~#
root@lp1877271-e:~# dpkg -l systemd|grep systemd
ii systemd 242-7ubuntu3.9 amd64 system and service manager
root@lp1877271-e:~# echo 1 > /proc/sys/net/ipv6/conf/eth0/disable_ipv6
root@lp1877271-e:~# ip -6 a show eth0
root@lp1877271-e:~# systemctl restart systemd-networkd
root@lp1877271-e:~# ip -6 a show eth0
112: eth0@if113: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link-netnsid 0
inet6 2001:db8::100/64 scope global tentative
valid_lft forever preferred_lft forever
inet6 fe80::216:3eff:fe7d:babb/64 scope link tentative
valid_lft forever preferred_lft forever
root@lp1877271-e:~# dpkg -l systemd|grep systemd net/ipv6/ conf/eth0/ disable_ ipv6
ii systemd 242-7ubuntu3.7 amd64 system and service manager
root@lp1877271-e:~# echo 1 > /proc/sys/
root@lp1877271-e:~# ip -6 a show eth0
root@lp1877271-e:~# systemctl restart systemd-networkd
root@lp1877271-e:~# ip -6 a show eth0
root@lp1877271-e:~#
root@lp1877271-e:~# dpkg -l systemd|grep systemd net/ipv6/ conf/eth0/ disable_ ipv6 MULTICAST, UP,LOWER_ UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link-netnsid 0 3eff:fe7d: babb/64 scope link tentative
ii systemd 242-7ubuntu3.9 amd64 system and service manager
root@lp1877271-e:~# echo 1 > /proc/sys/
root@lp1877271-e:~# ip -6 a show eth0
root@lp1877271-e:~# systemctl restart systemd-networkd
root@lp1877271-e:~# ip -6 a show eth0
112: eth0@if113: <BROADCAST,
inet6 2001:db8::100/64 scope global tentative
valid_lft forever preferred_lft forever
inet6 fe80::216:
valid_lft forever preferred_lft forever