Create swap file in Ubuntu

This content originally appeared on DEV Community and was authored by Bo

Create a swap file to let OS use when the physical memory is not big enough. Make the swap file as 1~2x big as your physical memory.

CreateSwap.sh:

#!/usr/bin/env bash

fallocate -l 12G /swapfile
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile

echo "/swapfile swap swap defaults 0 0" >> /etc/fstab

Then use swapon --show to check current swaps.

If your system already configured other swaps, you can use swapoff to remove it, for example:

swapoff /dev/sdb

Also remember to remove it in the /etc/fstab file such that it won't get used when system rebooted next time.

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This content originally appeared on DEV Community and was authored by Bo

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Bo | Sciencx (2022-03-25T17:46:03+00:00) Create swap file in Ubuntu. Retrieved from https://www.scien.cx/2022/03/25/create-swap-file-in-ubuntu/

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