Update cheatsheets

linux/dd

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dd
+
+> Convert and copy a file.
+> More information: <https://www.gnu.org/software/coreutils/dd>.
+
+- Make a bootable USB drive from an isohybrid file (such like `archlinux-xxx.iso`) and show the progress:
+
+`dd if={{path/to/file.iso}} of={{/dev/usb_drive}} status=progress`
+
+- Clone a drive to another drive with 4 MiB block, ignore error and show the progress:
+
+`dd if={{/dev/source_drive}} of={{/dev/dest_drive}} bs={{4M}} conv={{noerror}} status=progress`
+
+- Generate a file of 100 random bytes by using kernel random driver:
+
+`dd if=/dev/urandom of={{path/to/random_file}} bs={{100}} count={{1}}`
+
+- Benchmark the write performance of a disk:
+
+`dd if=/dev/zero of={{path/to/file_1GB}} bs={{1024}} count={{1000000}}`
+
+- Generate a system backup into an IMG file and show the progress:
+
+`dd if={{/dev/drive_device}} of={{path/to/file.img}} status=progress`
+
+- Restore a drive from an IMG file and show the progress:
+
+`dd if={{path/to/file.img}} of={{/dev/drive_device}} status=progress`
+
+- Check the progress of an ongoing dd operation (run this command from another shell):
+
+`kill -USR1 $(pgrep -x dd)`