2015-12-27 17:58:53 +08:00
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# dd
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2016-01-07 18:31:27 +01:00
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> Convert and copy a file.
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2021-04-01 17:54:26 +02:00
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> More information: <https://www.gnu.org/software/coreutils/dd>.
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2015-12-27 17:58:53 +08:00
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2023-01-01 05:34:56 +01:00
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- Make a bootable USB drive from an isohybrid file (such like `archlinux-xxx.iso`):
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2015-12-27 17:58:53 +08:00
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2023-01-01 05:34:56 +01:00
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`dd if={{path/to/file.iso}} of=/dev/{{usb_drive}}`
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2015-12-27 17:58:53 +08:00
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2023-01-01 05:34:56 +01:00
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- Clone a drive to another drive with 4 MiB block and ignore error:
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2015-12-27 17:58:53 +08:00
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2023-01-01 05:34:56 +01:00
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`dd if=/dev/{{source_drive}} of=/dev/{{dest_drive}} bs={{4194304}} conv={{noerror}}`
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2015-12-27 17:58:53 +08:00
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2016-01-16 15:12:05 +01:00
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- Generate a file of 100 random bytes by using kernel random driver:
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2015-12-27 17:58:53 +08:00
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2023-01-01 05:34:56 +01:00
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`dd if=/dev/urandom of={{path/to/random_file}} bs={{100}} count={{1}}`
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2015-12-27 17:58:53 +08:00
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2016-01-07 18:31:27 +01:00
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- Benchmark the write performance of a disk:
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2015-12-27 17:58:53 +08:00
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2023-01-01 05:34:56 +01:00
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`dd if=/dev/zero of={{path/to/file_1GB}} bs={{1024}} count={{1000000}}`
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2018-01-07 23:02:47 +03:30
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2023-01-01 05:34:56 +01:00
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- Generate a system backup into an IMG file:
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2021-06-05 20:53:27 +01:00
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2023-01-01 05:34:56 +01:00
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`dd if={{/dev/drive_device}} of={{path/to/file.img}}`
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2021-06-05 20:53:27 +01:00
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2023-01-01 05:34:56 +01:00
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- Restore a drive from an IMG file:
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2021-06-05 20:53:27 +01:00
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2023-01-01 05:34:56 +01:00
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`dd if={{path/to/file.img}} of={{/dev/drive_device}}`
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