# Is It Healthy? Memory, Load and Uptime

uptime says how long a computer has been running and how busy it is, which you compare with the number of CPUs nproc prints; free -h says how much memory is still available and df -h how much disk is left; and a short script puts them all on one screen.

![Cheat sheet for the lesson Is It Healthy? Memory, Load and Uptime: uptime says how long a computer has been running and how busy it is, which you compare with the number of CPUs nproc prints; free -h says how much memory is still available and df -h how much disk is left; and a short script puts…](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/94a15261fbe84ba2a5ee209865014e09.webp)

- Category: Bash
- Level: Journeyman
- Tags: available-memory, df-and-du, health-check, linux, load-average, swap, unix
- Updated: November 10, 2026

Source: https://www.ask-codey.com/cheat-sheets/bash-system-health-cheat-sheet