mirror of https://github.com/CrimsonTome/tldr.git
29 lines
1010 B
Markdown
29 lines
1010 B
Markdown
# dd
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> Convert and copy a file.
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> More information: <https://www.gnu.org/software/coreutils/dd>.
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- Make a bootable USB drive from an isohybrid file (such as `archlinux-xxx.iso`) and show the progress:
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`dd status=progress if={{path/to/file.iso}} of={{/dev/usb_drive}}`
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- Clone a drive to another drive with 4 MiB block size and flush writes before the command terminates:
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`dd bs={{4M}} conv={{fsync}} if={{/dev/source_drive}} of={{/dev/dest_drive}}`
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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={{1M}} count={{1000000}} if=/dev/zero of={{path/to/file_1GB}}`
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- Create a system backup and save it into an IMG file (can be restored later by swapping `if` and `of`):
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`dd if={{/dev/drive_device}} of={{path/to/file.img}}`
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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 -x dd)`
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