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38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
---
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syntax: markdown
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tags: [tldr, osx]
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source: https://github.com/tldr-pages/tldr.git
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---
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# dd
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> Convert and copy a file.
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> More information: <https://keith.github.io/xcode-man-pages/dd.1.html>.
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- Make a bootable USB drive from an isohybrid file (such like `archlinux-xxx.iso`) and show the progress:
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`dd if={{path/to/file.iso}} of={{/dev/usb_device}} status=progress`
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- Clone a drive to another drive with 4 MB block, ignore error and show the progress:
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`dd if={{/dev/source_device}} of={{/dev/dest_device}} bs={{4m}} conv={{noerror}} status=progress`
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- Generate a file of 100 random bytes by using kernel random driver:
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`dd if=/dev/urandom of={{path/to/random_file}} bs={{100}} count={{1}}`
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- Benchmark the write performance of a disk:
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`dd if=/dev/zero of={{path/to/1GB_file}} bs={{1024}} count={{1000000}}`
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- Generate a system backup into an IMG file and show the progress:
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`dd if=/dev/{{drive_device}} of={{path/to/file.img}} status=progress`
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- Restore a drive from an IMG file and show the progress:
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`dd if={{path/to/file.img}} of={{/dev/drive_device}} status=progress`
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- Check the progress of an ongoing dd operation (run this command from another shell):
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`kill -USR1 $(pgrep ^dd)`
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