TS-4900 Bullseye Network
From embeddedTS Manuals
The network in Debian is configured /etc/network/interfaces.d/. For complete documentation, see Debian's documentation here
Some common examples are shown below.
DHCP on eth0. Create the file: /etc/network/interfaces.d/eth0
auto eth0 allow-hotplug eth0 iface eth0 inet dhcp
Static IP on eth0. Create the file /etc/network/interfaces.d/eth0
auto eth0 iface eth0 inet static address 192.0.2.7/24 gateway 192.0.2.254
These will take effect on the next boot, or by restarting the networking service:
service networking restart