Hi folks,
I’m going nuts. All over the internet it is said that setting a static IP is easy for BeagleBoard-xM running Ubuntu. Just change /etc/network/interfaces …
One post suggests to just change the eth0-device. Another post changes eth0- and usb0-device as well. Both didn’t work for me. As long as I don’t thouch usb0 there is only one way to get the BeagleBoard connected - using the auto-config of eth0 via DHCP. And that’s no good for I’d like to make the Beagle a Pi-hole …
Can anybody please give me a hint how I can set the classic static 192.168.178.5 for my Beagle?
Max
My first step after reading while waiting for approval (excuse my cross-posting) was
sudo systemctl disable connman.service
After reboot there was no connman anymore. But the appended /etc/network/interfaces still does not have any effect 
sudo cat /etc/network/interfaces
This file describes the network interfaces available on your system
and how to activate them. For more information, see interfaces(5).
The loopback network interface
auto lo
iface lo inet loopback
The primary network interface
auto eth0
iface eth0 inet dhcp
auto eth0
iface eth0 inet static
address 192.168.178.5
netmask 255.255.255.0
network 192.168.178.0
broadcast 192.168.178.255
gateway 192.168.178.1
dns-search fritz.box
dns-nameservers 192.168.178.1
sudo ifconfig
eth0: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC> mtu 1500
inet 192.168.178.30 netmask 255.255.255.0 broadcast 192.168.178.255
inet6 2003:e5:4f4e:9000:dd88:c9ee:10cd:93e5 prefixlen 64 scopeid 0x0
inet6 fe80::5496:4382:7f0d:6e2 prefixlen 64 scopeid 0x20
inet6 2003:e5:4f4e:9000:84af:175c:c818:f10b prefixlen 64 scopeid 0x0
ether 02:02:00:02:15:80 txqueuelen 1000 (Ethernet)
RX packets 107835 bytes 39160508 (39.1 MB)
RX errors 0 dropped 71414 overruns 0 frame 0
TX packets 20283 bytes 5293839 (5.2 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 3398 bytes 314287 (314.2 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3398 bytes 314287 (314.2 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
usb0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 02:11:67:8c:6b:cb txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Ubuntu 18.04 is wired to use netplan/sysetmd-networkd..
In my images, i replace that with connman..
https://netplan.io/
Regards,