RPi Micro SD Cards - open-mpi/aws-pmix-scale-testing GitHub Wiki
Getting images on microSD cards
https://www.raspberrypi.org/documentation/installation/installing-images/linux.md
lsblk
Insert microSD card
lsblk
Find the name of the SD card. The name of the SD card, not the individual partitions (Important)
Now unmount the partitions if they are mounted
umount /dev/partitionName
Now make sure you know where your image is you'd like to write to your SD card
dd bs=4M if=/path/to/img.img of=/dev/sdCardName
You should be able to boot the image now
Mounting images
https://www.tecmint.com/how-to-mount-and-unmount-an-iso-image-in-linux/