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dd

convert and copy a file

Make a bootable usb drive from an isohybrid file (such like archlinux-xxx.iso)

dd if={{file.iso}} of=/dev/{{usb_drive}}

Clone a drive to another drive with 4MB block and ignore error

dd if=/dev/{{source_drive}} of=/dev/{{dest_drive}} bs=4M conv=noerror

Generating a file of 100 random bytes by using kernel random driver

dd if=/dev/urandom of={{random_file}} bs=100 count=1

Benchmark the write performance of a disk

dd if=/dev/zero of={{file_1GB}} bs=1024 count=1000000