How to Use Linux Server tmpfs for RAM Backed Storage

In this episode of Linux Server Admin, Lucas and Luna dive deep into tmpfs on Linux servers — a filesystem that lives entirely in RAM. They explain what tmpfs actually is under the hood, how it differs from ramfs and swap-backed storage, and walk through a practical setup for a web server's session cache. You'll learn the exact mount options to use, how to set size limits so you don't OOM your box, and when tmpfs is the right tool versus when you should reach for something like Redis or a disk-backed directory. The hosts also cover persistence gotchas, including what happens on reboot, and share real-world monitoring tips using df and free. Whether you're running nginx, PostgreSQL, or just want faster /tmp, this episode gives you the specific commands and trade-offs you need to decide if RAM-backed storage fits your workload.

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