mirror of https://github.com/CrimsonTome/tldr.git
29 lines
1.0 KiB
Markdown
29 lines
1.0 KiB
Markdown
# 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_drive}} 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 bs=4m conv=noerror if={{/dev/source_drive}} of={{/dev/dest_drive}} status=progress`
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- Generate a file with a specific number of random bytes by using kernel random driver:
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`dd bs={{100}} count={{1}} if=/dev/urandom of={{path/to/random_file}}`
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- Benchmark the write performance of a disk:
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`dd bs={{1024}} count={{1000000}} if=/dev/zero of={{path/to/1GB_file}}`
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- Create a system backup, save it into an IMG file (can be restored later by swapping `if` and `of`), and show the progress:
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`dd if={{/dev/drive_device}} of={{path/to/file.img}} 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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