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https://blog.offline-net.com/2012/01/28/cygwin%ef%bc%9awindows-%e3%81%a7%e3%80%8cssh-server%e3%80%8d%e3%82%92%e6%a7%8b%e7%af%89%e3%81%99%e3%82%8b/
Cygwin:Windows で「ssh server」を構築する