This guide is about the How to Write Image Files to SD Card with dd from Command Line of Mac or Linux. I will try my best so that you understand this guide very well. I hope you all like this guide How to Write Image Files to SD Card with dd from Command Line of Mac or Linux.
Do I need to write an image file to the SD card? The ‘dd’ command line tool can do this for you by writing a disk image .img file to the SD card with minimal effort. A nice benefit of using dd to write image files to an SD card is that it works with both Mac OS and Linux right out of the box, as it is pre-installed, and there is no need for other downloads or third-party applications to burn the image this way.
Using Dd from the command line to write an image to the SD card is considered advanced, so this is best for users who are happy with the command line. For example, you can use this to write a boot image to RaspberryPi or another quick-boot Linux installation. A simpler option for most users is to use a third-party application, such as Etcher, the image writing to the SD card. Nevertheless, dd works fine as long as you have an understanding of the command line. Using dd in this way to write an SD card image is similar to using dd to burn ISO to a USB drive or another disk image, except that the file format is of course different and so is the destination.
How to write .img to SD card via command line with dd
Start by launching the Terminal application from the / Applications / Utilities / folder. Also ask to write your .img file somewhere easy to find, we assume here it is in your current working directory.
You must have a disk tag for the destination card where you want to write the img file, so let’s run the diskutil list first:
diskutil list
Locate the SD card in the output of the diskutil list and write down the rdiskNUMBER disk tag associated with the SD card. You use it as an SD card destination when writing, as well as the file name of the disk image when writing to the destination SD card.
Use the following script syntax to write an .img image file to an SD card:
sudo dd if = NameOfImageToWrite.img / = dev / rdiskNUMBER bs = 1m
NameOfImageToWrite.img is replaced by image and path and rdiskNUMBER by the disk ID of the SD card found in the “diskutil list” output.
Click return and enter the administrator password to begin the typing process. This may take some time, depending on the size of the image file and the speed of the SD card.
For example, if the disk image name is “RaspberryPiCustom.img” and the disk extension is “/ dev / rdisk4”, the command looks like this:
sudo dd if = RaspberryPiCustom.img / = dev / rdisk4 bs = 1m
This should be fairly simple and straightforward for users who are already familiar with the command line.
Another option, temporarily different from an SD card, that may work for some users is to burn disk images directly from the Mac Finder in modern Mac OS releases, which works well if you have a CDRW or DVD-RW and also work with regular users in disk file formats. An older release of Mac OS X can also use Disk Utility to burn ISO and other images, but modern versions of Disk Utility have lost this capability. Fortunately, the dd tool can burn ISO images from the command line as well as write the image to a USB drive.
Do you know of another approach to writing image .img files to SD card via command line or otherwise? Share your tips or comments below!
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