Creating a Raspberry Pi Disk Image on Ubuntu
I was interested in creating a
.img disk image for the SD card on the pi so that I could
distribute my custom software to multiple devices quickly (by writing the image to all my
Here’s how to accomplish this using Ubuntu.
- Before you create the image, shrink your raspberry pi’s existing partitions as much as possible to reduce the
.imgsize (shrink most free space).
- Take the SD card you want to image and put it in a card reader. Plug it into your computer.
- Run gparted (
sudo gparted) and look for the device. It should be in a dropdown that has
/dev/sdX. options. You want to find the device that has your image.
- After selecting the correct device, right click the last partition you want to copy and find the Last sector number. Copy it.
sudo dd if=/dev/<sdx> of=<desired path of your new .img file> bs=512 count=<last sector number copied from gparted>Here’s an example:
sudo dd if=/dev/sde of=/home/samliu/sammyprinter.img bs=512 count=5838847
- Ubuntu has a handy utility installed called “Startup Disk Creator”. You can load the image there and choose a SD card plugged
into your machine to write it to. EDIT September 2022: “Raspberry Pi Imager” also supports custom
Optional: once you boot into raspbian using the newly created card, you can re-expand the partitions to full size by using
sudo raspi-config and the “Expand Filesystem” option.