free Command - Display Memory Usage

free displays the total amount of free and used physical and swap memory in the system, as well as the buffers and caches used by the kernel.

Syntax

free [options]

Examples

free -h

free -m

Notes

• Values are shown for total, used, free, shared, buffer/cache, and available memory.
• Useful for monitoring system performance and troubleshooting memory issues.
• Commonly used with -h for human-readable output.