Flashing Linux to SD Card

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How to flash Linux onto an SD Card? 

dd if=file.img of=/dev/sdx bs=4M status=progress

where /dev/sdx is the SD Card block device (NOT a partition, the whole thing!).

Clearing an SD Card

The following clears the start and the end of an SD Card (or any block device in general).

SD_CARD_DEVICE=/dev/sdX sudo dd if=/dev/zero of=$SD_CARD_DEVICE bs=512 count=1024 sudo dd if=/dev/zero of=$SD_CARD_DEVICE bs=512 seek=$(( $(blockdev --getsz $SD_CARD_DEVICE) - 1024 )) count=1024

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