How to create a ramdisk?

Whether you have SSD with NVME Protocol or good old HDD, It is not going to make you feel superior than your Random Access Memory or RAM.

By creating a ramdisk, you can use your unused memory as a super fast disk space and work with it. I do need to use nginx and for caching, I always go to tmpfs which is filesystem type that typically uses ram. How do I create one?

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