70 lines
1.9 KiB
Bash
70 lines
1.9 KiB
Bash
#!/bin/bash
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set -e # exit on error
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TARGET_FOLDER="./rpi_image"
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VERSION="2020-02-13"
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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 [[ $EUID -ne 0 ]]; then
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echo "This script must be run as root"
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exit 1
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fi
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echo -n Hostname of new pi
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read -p "Hostname of new pi [newrpi]: " RPI_HOSTNAME
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RPI_HOSTNAME=${HOSTNAME:-newrpi}
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SCRIPT_DIR=`pwd`
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mkdir -p $TARGET_FOLDER
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cd $TARGET_FOLDER
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echo "Downloading image"
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IMG_FILE_BASENAME=${VERSION}-raspbian-buster-lite.zip
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wget http://downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-${VERSION}/${IMG_FILE_BASENAME}.zip
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wget http://downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-${VERSION}/${IMG_FILE_BASENAME}.zip.sha256
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echo "Checksum verification"
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sha256sum -c ${IMG_FILE_BASENAME}.zip.sha256
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echo "Unpack image"
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unzip ${IMG_FILE_BASENAME}.zip
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rm ${IMG_FILE_BASENAME}.zip
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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/public_keys/*.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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echo "Unmounting image"
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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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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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