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How to pre-configure rasberry image for swedish wifi and enable ssh

Details: Category: Blog; Published: Saturday, 06 February 2021 15:54; Written by Lars Berntzon; Hits: 2090

This will setup a raspian image to be used with a swedish wifi and ssh enabled. Done in linux.

Prologue:

Map the partitions from the image with:
kpartx -a <name-of-unpacked-raspian-image>.img
Run losetup to see which loop device was used. Lets say it was loop4 in this case
Mount the root partition of the image (second partition) under /mnt:
sudo mount /dev/mapper/loop4p2 /mnt

Wifi:

Create the file /mnt/etc/wpa_supplicant/wpa_supplicant.conf with following content:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=SE
network={
        ssid="<your-wifi-ssid>"
        psk="<your-wifi-password>"
}

Replace the '1' to a '0' i all files /mnt/var/lib/systemd/rfkill/platform-*

Enable ssh daemon:

Either do:

ln -s /lib/systemd/system/ssh.service /mnt/etc/systemd/system/
ln -s /lib/systemd/system/ssh.service /mnt/etc/systemd/system/multi-user.target.wants/

Or mount the boot partition and touch a file named "ssh" in that directory.

Epilogue:

Run: umount /mnt
Drop the devicemapper mappings:
kpartx -d <name-of-unpacked-raspian-image>.img

Now your image file should be ready to write to a MicroSD card and the raspberry should boot up directly to the wifi network with ssh enabled.

Extra stuff

Enable camera:

Run the kpartx and mount /dev/mapper/loop4p1 instead as /mnt
Add following files to the "[all]" section of /mnt/config.txt:
```
start_x=1
gpu_mem=128
```