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I am a linux fresher. I make a folder /dev/test/ in Ubuntu. When I rebooted the server, the folder /dev/test/ was disappear. Can restore the folder? Why?

Thank you.

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...why did you create anything under /dev ? You probably shouldn't be poking in the device subfolder without good reason. – Bart Silverstrim Apr 24 '12 at 15:47
up vote 2 down vote accepted

Device file system in Linux is not a filesystem stored on disk. See this wikipedia article. In kernel 2.6 series it is devtmpfs and is managed by udev.

In short the things you do in /dev filesystem do not persist through reboot.

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