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+Sometime is it useful to boot HermitCore from a raw image. For instance, [Google Compute Platform](https://cloud.google.com/compute/docs/images/import-existing-image) depends on this image format.
+
+In this tutorial, an image will be created for the application _stream_. At first, we create with `dd` an raw file. A size of 50 Mb (=512 block size * 102400 block) is for `stream` large enough.
+
+```bash
+$ dd if=/dev/zero of=stream.img bs=512 count=102400
+102400+0 records in
+102400+0 records out
+52428800 bytes (52 MB, 50 MiB) copied, 0.138028 s, 380 MB/s
+```
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