tldr/pages/common/dd.md

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# dd
> Convert and copy a file.
> More information: <https://www.gnu.org/software/coreutils/dd>.
- Make a bootable USB drive from an isohybrid file (such like `archlinux-xxx.iso`):
`dd if={{path/to/file.iso}} of=/dev/{{usb_drive}}`
- Clone a drive to another drive with 4 MiB block and ignore error:
`dd if=/dev/{{source_drive}} of=/dev/{{dest_drive}} bs={{4194304}} conv={{noerror}}`
- Generate a file of 100 random bytes by using kernel random driver:
`dd if=/dev/urandom of={{path/to/random_file}} bs={{100}} count={{1}}`
- Benchmark the write performance of a disk:
`dd if=/dev/zero of={{path/to/file_1GB}} bs={{1024}} count={{1000000}}`
- Generate a system backup into an IMG file:
`dd if={{/dev/drive_device}} of={{path/to/file.img}}`
- Restore a drive from an IMG file:
`dd if={{path/to/file.img}} of={{/dev/drive_device}}`
- Check the progress of an ongoing dd operation (run this command from another shell):
`kill -USR1 $(pgrep ^dd)`