File Data/Operations (cont)
Unix uses a file-like interface for many kinds of objects:
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/dev/tty1 ... terminal devices
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/dev/null ... data sink
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/dev/cdrom ... CD reader
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/dev/nbd1 ... network streams
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/proc/3666/ ... info about one process
Some of these (e.g. /dev/tty1) are not persistent.
Instead, they give an infinite stream of incoming/outgoing data.
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