misc/debian/bullseye/systemd/network/README.md

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# Usage
Copy the device files that you need to `/etc/systemd/network/`.
Be sure the file-names, folders and configuration values (within the files) are changed to match your devices ([note 1](#Notes)). Wifi (wlan) devices also need wpa_supplicant configured to work.
## Example
Say I have eth0 and want network access (and an IP via DHCP) from my router; I would do the following...
```
sudo -s # Drop to root.
cp -rv 10-eth0* /etc/systemd/network/ # Copy the files.
systemctl enable --now systemd-networkd # Enable networkd now.
networkctl reload # Reload the configuration.
networkctl status # Check the log for any errors.
```
If there are NO **and I mean NO errors** from the commands above...
```
networkctl reconfigure eth0 # Tell networkd to reconfigure the device.
mv /etc/network/ /etc/network.disabled/ Move the old network configuration.
reboot # Restart to be sure.
```
## Enabling systemd-resolved
I like to use systemd-resolved for DNS..
```
sudo -s # Drop to root.
ln -sfv /var/run/systemd/resolve/stub-resolv.conf /etc/resolv.conf # Create a symlink.
systemctl enable --now systemd-resolved # Enable resolved now.
```
## Notes
**1**: This is very important otherwise things won't work. For example, if you have eth1 and not eth0 you'll have to copy and/or rename `eth0.network` to `eth1.network`. Check, and then check again.