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37 lines
1.0 KiB
Markdown
37 lines
1.0 KiB
Markdown
# dd
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Convert and copy a file.
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## TL;DR
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```sh
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# Read 512 random Bytes for each iteration and save them .
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dd if='/dev/urandom' of='output/file' count=2 bs=512
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# Read 1000 Bytes for each iteration and save them while watching the progress.
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dd if='/input/file' of='output/file' count=4M bs=1k status='progress'
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# Create a 1GiB file with nothing but zeros, ready to mkswap(8) it.
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dd if='/dev/zero' of='/swapfile' count=1048576 bs=1024
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# Make a bootable USB drive from an isohybrid file.
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dd if=file.iso of=/dev/usb_drive status=progress
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# Clone a drive to another drive with 4 MiB block.
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# Ignore any error and show the progress.
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dd if=/dev/source_drive of=/dev/dest_drive bs=4M conv=noerror status=progress
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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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```
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## Sources
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- [cheat.sh]
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<!-- external references -->
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[cheat.sh]: https://cheat.sh/dd
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