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System Administration Guide
Summary
A detailed Linux guide explaining htop's interface, covering uptime, load average, process states, and memory metrics like VIRT, RES, SHR, and MEM%, based on Ubuntu Server 16.04 x64.
Highlights
- Explains uptime and how it is read from /proc/uptime
- Clarifies load average and common misconceptions
- Details Linux process states including R, S, D, Z, T, and t
- Breaks down memory usage metrics: VIRT/VSZ, RES/RSS, SHR, and MEM%
- Uses strace to show how system tools read kernel data
auto-generated
Context
Audience
Linux system administrators, developers, and power users who want to understand system monitoring tools
DomainLinux System Administration
Formatlong-form article
Accessfree online
Source Overview
This post explains every field displayed in htop/top on Linux, covering uptime, load average, process states, and memory metrics (VIRT, RES, SHR, MEM%).
Load average is an exponentially damped moving average of running and uninterruptible processes read from /proc/loadavg, not a simple CPU utilization percentage. Each process state, system daemon, and /proc source file is broken down with terminal examples.
Topics
Related
htoptopproc filesystemstraceLinux process managementUbuntu Server
