swapon / swapoff

CautionManage swap

swapon --show

Shows and enables swap. The emergency RAM-pressure fix: create a swap file, mkswap, swapon.

Examples

fallocate -l 2G /swapfile && chmod 600 /swapfile && mkswap /swapfile && swapon /swapfileAdd a 2 GB swap file

Syntax

swapon --show / swapon <dev|file> / mkswap <dev|file>

Before you run it

swapoff can hang under memory pressure.

Related commands

freeMemory usage
sysctlKernel parameters
dmesgShow kernel ring buffer

The same reference, with no signal at all

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