tldr/pages/linux/dd.md

1.1 KiB

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) and show the progress:

dd if={{path/to/file.iso}} of={{/dev/usb_drive}} status=progress

  • Clone a drive to another drive with 4 MiB block, ignore error and show the 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={{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 and show the progress:

dd if={{/dev/drive_device}} of={{path/to/file.img}} status=progress

  • Restore a drive from an IMG file and show the progress:

dd if={{path/to/file.img}} of={{/dev/drive_device}} status=progress

  • Check the progress of an ongoing dd operation (run this command from another shell):

kill -USR1 $(pgrep -x dd)