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tldr/pages/common/dd.md
pixel 41d7de9950
dd: remove checking progress example (#9816) 
`pgrep` does not exist and `kill` needs `-s`.
But most importantly, `dd` doesn't have any "showing progress"
functionality.
2023-02-03 12:17:57 +08:00

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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}}