Update cheatsheets

rawtoppm

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rawtoppm
+
+> Convert a raw RGB stream to a PPM image.
+> More information: <https://netpbm.sourceforge.net/doc/rawtoppm.html>.
+
+- Convert a raw RGB stream to a PPM image:
+
+`rawtoppm {{width}} {{height}} {{path/to/image.raw}} > {{path/to/output.ppm}}`
+
+- Convert a raw RGB stream in which the pixels come bottom-first instead of top-first to a PPM image:
+
+`rawtoppm {{width}} {{height}} {{path/to/image.raw}} | pamflip -tb > {{path/to/output.ppm}}`
+
+- Ignore the first n bytes of the specified file:
+
+`rawtoppm {{width}} {{height}} -headerskip {{n}} {{path/to/image.raw}} > {{path/to/output.ppm}}`
+
+- Ignore the last m bytes of each row in the specified file:
+
+`rawtoppm {{width}} {{height}} -rowskip {{m}} {{path/to/image.raw}} > {{path/to/output.ppm}}`
+
+- Specify the order of color components for each pixel:
+
+`rawtoppm {{width}} {{height}} -{{rgb|rbg|grb|gbr|brg|bgr}} {{path/to/image.raw}} > {{path/to/output.ppm}}`