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| TMPFS |
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| NuttX TMPFS file system is a tiny dynamic RAM based file system. |
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| It can be enabled by adding ``CONFIG_FS_TMPFS=y`` to the configuration at build time. |
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| At runtime, simply use ``mount -t tmpfs /tmp`` to have a ``/tmp`` folder backed by TMPFS, then files and folders can be created under that folder. |
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| Be aware that TMPFS is backed by kernel memory thus don't expect to store big files on it and its size is limited by free kernel memory. |
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| We can watch the size of TMPFS with ``df -h`` command, especially you can see the ``Size`` column of TMPFS changes when files are added or removed in the TMPFS folder. Changes in TMPFS size is always reflected by reverse changes of free kernel memory size. |
