tldr/pages/common/dd.md

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# dd
> Convert and copy a file.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/dd-invocation.html>.
- Make a bootable usb drive from an isohybrid file (such like `archlinux-xxx.iso`) and show the progress:
`dd if={{file.iso}} of=/dev/{{usb_drive}} status=progress`
- Clone a drive to another drive with 4MB block, ignore error and show progress:
`dd if=/dev/{{source_drive}} of=/dev/{{dest_drive}} bs=4M conv=noerror status=progress`
- Generate 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`
- Check progress of an ongoing dd operation (Run this command from another shell):
`kill -USR1 $(pgrep ^dd)`