dd — Convert and copy a file.
# source: tldr · verified

Examples:
  # Make a bootable USB drive from an isohybrid file (such as `archlinux-xxx.iso`) and show the progress [GNU]
    $ sudo dd status=progress if=path/to/file.iso of=/dev/usb_drive
  # Clone a drive to another drive with 4 MiB block size and flush writes before the command terminates [GNU]
    $ sudo dd bs=4M conv=fsync if=/dev/source_drive of=/dev/dest_drive
  # Generate a file with a specific number of random bytes by using kernel random driver [GNU]
    $ dd bs=100 count=1 if=/dev/urandom of=path/to/random_file

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