How To Add Swap Space on Ubuntu

**How To Add Swap Space on Ubuntu**

Introduction When a server runs out of RAM, the kernel can kill processes (OOM kills), crash applications, or refuse new connections. Swap space gives the system a disk-backed fallback so it can move less-used data out of RAM and keep the system running under memory pressure. On cloud VPS instances with fixed RAM, adding swap is a standard way to reduce the risk of out-of-memory failures without immediately upgrading the droplet. This guide shows how to add swap on Ubuntu using a swap file: create the file, enable it, make it persistent across reboots, and tune kernel settings. All steps work without a reboot and apply to Ubuntu 22.04 and later versions...

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