The Cult of DD

You'll often see instructions for creating and using disk images on Unix systems making use of the dd command. This is a strange program of [obscure provenance](https://en.wikipedia.org/wiki/Dd_(Unix)) that somehow, still manages to survive in the 21st century. Actually, using dd is almost never necessary, and due to its highly nonstandard syntax is usually just an easy way to mess things up. For

[tmatsuu]

「head -c 100MB /dev/zero >image.iso」目から鱗。ddと比べてどっちのほうが早いだろう。

[dowhile]

ddよりもcat/headで十分