1# The Pseudo Terminal Filesystem
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3The device register on ptyfs is also registered in device frameworks with `rt_device_register()`.
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5It's possible to mount a new ptyfs instance on another path. Each instance is isolated to each other. And they don't share the id system. But generally speaking, you have to mount the ptyfs on `/dev` root, since all the file nodes in ptyfs are devices.
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