How to check available swap space on your server.

Introduction

This article shows how to determine how much swap space is available on your host to use as memory.

Procedure

You can simply use the free -m command to see the swap space.  The bottom line will contain the information you need.

-bash-4.2# free -m
 total used free shared buff/cache available
Mem: 1998 480 409 104 1108 1229
Swap: 1023 37 986

You can also look at the /etc/meminfo file using grep to get the information you need.

-bash-4.2# cat /proc/meminfo | grep Swap
SwapCached: 9592 kB
SwapTotal: 1048572 kB
SwapFree: 1001212 kB