update readme

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CuttySark1869 2023-03-05 21:58:09 +00:00
parent 276fbc06b5
commit 452cfc1c55
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@ -17,7 +17,7 @@ Usage: $0 [-adhrsvzZ] imagefile.img [newimagefile.img]
-Z Compress image after shrinking with xz
-a Compress image in parallel using multiple cores
-d Write debug messages in a debug log file
-n The first input is device, not file
-n Accept an input that is not a file (e.g. a tf card)
```
If you specify the `newimagefile.img` parameter, the script will make a copy of `imagefile.img` and work off that. You will need enough space to make a full copy of the image to use that option.