rpi-mkimg

mkimg.sh

Create a distributable image from a Raspberry Pi SD card.

mkimg-pine64.sh

Create a distributable image from a Pine64 SD card.

NOTE: This script has not been used for imaging irreplaceable data. While this script should not be destructive, it modifies the filesystem and partition table.

WARNING: ALWAYS BACKUP YOUR CARD FIRST

It can be run like this:

bash mkimg.sh /dev/sda sdcard.img.zip

My command for creating NEMS build for Raspberry Pi is:

./mkimg.sh /dev/sdc NEMS_v1.3.img.zip

My command for creating NEMS build for Pine64 is:

./mkimg-pine64.sh /dev/sdc NEMS_v1.3.img

What does the script do

Under the hood the script performs the following operations:

[mkimg.sh only] ensures the first partition is fat32 and the second partition ext4
fixes any errors on the filesystem
shrinks the Linux filesystem to its smallest size
shrinks the Linux partition to the size of the filesystem + small buffer
creates a image from the given device
[mkimg.sh only] compresses the image to a zip file
[mkimg-pine64.sh only] create matching md5 checksum file
expands the partition and filesystem back to their largest sizes

Flash SD card with the image

Linux

Replace <device> with the location of your SD card; e.g. /dev/sda:

unzip -p sdcard.img.zip | sudo dd bs=1M of=<device>

Mac

Replace <device> with the location of your SD card; e.g. /dev/rdisk1:

unzip -p sdcard.img.zip | sudo dd bs=1m of=<device>

Windows

Use the WIN32 Disk Imager tool.

Cat5TV/rpi-mkimg