93 lines
2.5 KiB
Bash
Executable File
93 lines
2.5 KiB
Bash
Executable File
#!/bin/bash
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set -e # exit on error
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TARGET_FOLDER="./rpi_image"
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IMG_FILE_BASENAME="2023-12-11-raspios-bookworm-armhf-lite"
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#DOWNLOAD_URL="https://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2021-11-08/${IMG_FILE_BASENAME}.zip"
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DOWNLOAD_URL="https://downloads.raspberrypi.com/raspios_lite_armhf/images/raspios_lite_armhf-2023-12-11/${IMG_FILE_BASENAME}.img.xz"
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echo "This script downloads raspian lite, and modifies the image to enable SSH and set hostname"
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if [[ $EUID -ne 0 ]]; then
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echo "This script must be run as root"
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exit 1
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fi
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echo -n Hostname of new pi
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read -p "Hostname of new pi [newrpi]: " RPI_HOSTNAME
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read -p "WIFI password (leave empty for non-wifi setup) [] " WIFI_PASSWORD
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RPI_HOSTNAME=${RPI_HOSTNAME:-newrpi}
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SCRIPT_DIR=`pwd`
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mkdir -p $TARGET_FOLDER
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cd $TARGET_FOLDER
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echo "Downloading image"
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wget ${DOWNLOAD_URL}
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wget ${DOWNLOAD_URL}.sha256
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echo "Checksum verification"
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sha256sum -c ${IMG_FILE_BASENAME}.img.xz.sha256
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echo "Unpack image"
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unxz ${IMG_FILE_BASENAME}.img.xz
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echo "Mounting image"
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mkdir mounted_image
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mkdir mounted_image/boot
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mkdir mounted_image/system
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losetup -P /dev/loop42 ${IMG_FILE_BASENAME}.img
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mount /dev/loop42p1 mounted_image/boot
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mount /dev/loop42p2 mounted_image/system
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echo "Enabling SSH and writing hostname"
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echo $RPI_HOSTNAME > mounted_image/system/etc/hostname
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touch mounted_image/boot/ssh # startup ssh
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sed -i "/^#PermitRootLogin/ cPermitRootLogin prohibit-password" mounted_image/system/etc/ssh/sshd_config
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mkdir -p mounted_image/system/root/.ssh
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cat $SCRIPT_DIR/*.pub > mounted_image/system/root/.ssh/authorized_keys
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chmod 700 mounted_image/system/root/.ssh
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chmod 600 mounted_image/system/root/.ssh/authorized_keys
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if [ -z "$WIFI_PASSWORD" ]
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then
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echo "Skipping WIFI setup"
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else
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echo "Setting up initial wifi config"
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/bin/cat <<EOM >mounted_image/boot/wpa_supplicant.conf
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country=DE
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ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
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update_config=1
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network={
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ssid="WLAN"
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psk="${WIFI_PASSWORD}"
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}
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EOM
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fi
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echo "Unmounting image and other cleanup"
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sleep 3 # to prevent "device is busy"
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umount /dev/loop42p1
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umount /dev/loop42p2
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losetup -d /dev/loop42
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rmdir mounted_image/boot
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rmdir mounted_image/system
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rmdir mounted_image
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rm ${IMG_FILE_BASENAME}.img.xz.sha256
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chmod a+rw ${IMG_FILE_BASENAME}.img .
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echo ""
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echo ""
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echo "The image is ready in folder ${TARGET_FOLDER}"
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echo "copy to SD card with"
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echo " dd bs=4M status=progress if=the_image of=/dev/your/sdcard"
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echo " use e.g. /dev/sdb not /dev/sdb1"
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