tldr/pages/common/dd.md

24 lines
709 B
Markdown
Raw Normal View History

2015-12-27 09:58:53 +00:00
# dd
> Convert and copy a file.
2015-12-27 09:58:53 +00:00
2016-04-16 20:43:30 +01:00
- Make a bootable usb drive from an isohybrid file (such like archlinux-xxx.iso) and show the progress:
2015-12-27 09:58:53 +00:00
2016-04-16 20:43:30 +01:00
`dd if={{file.iso}} of=/dev/{{usb_drive}} status=progress`
2015-12-27 09:58:53 +00:00
2016-04-16 20:43:30 +01:00
- Clone a drive to another drive with 4MB block, ignore error and show progress:
2015-12-27 09:58:53 +00:00
2016-04-16 20:43:30 +01:00
`dd if=/dev/{{source_drive}} of=/dev/{{dest_drive}} bs=4M conv=noerror status=progress`
2015-12-27 09:58:53 +00:00
- Generate a file of 100 random bytes by using kernel random driver:
2015-12-27 09:58:53 +00:00
`dd if=/dev/urandom of={{random_file}} bs=100 count=1`
- Benchmark the write performance of a disk:
2015-12-27 09:58:53 +00:00
`dd if=/dev/zero of={{file_1GB}} bs=1024 count=1000000`
2018-01-07 19:32:47 +00:00
2018-01-08 06:42:00 +00:00
- Check progress of an ongoing dd operation (Run this command from another shell):
2018-01-07 19:32:47 +00:00
`kill -USR1 $(pgrep ^dd)`