Stop guessing what’s slowing down Linux. Do this instead
Stop guessing what’s slowing down Linux. Do this instead
https://www.howtogeek.com/the-easiest-way-to-diagnose-whats-slowing-down-linux-without-guessing/
Publish Date: 2026-03-23 11:30:00
Source Domain: www.howtogeek.com
With Linux, especially if you’re new, it can be confusing when the operating system slows down—seemingly out of the blue. It can happen with any OS, but you might know how to pinpoint it on Windows, yet not Linux.
It can be daunting, but it’s easy. Here’s how.
Get the big picture (htop)
When a Linux system begins to crawl, your first instinct is often to start killing processes or rebooting entirely. However, the most effective approach begins with obtaining a comprehensive, real-time overview of system health. The tool of choice for this initial assessment is htop, an interactive process viewer that serves as a modern, user-friendly replacement for the classic top command.
Launching htop instantly presents a visual dashboard divided into two primary sections. The upper section displays critical resource utilization through color-coded bar graphs, illustrating the current load on individual CPU cores, physical memory allocation, and swap space usage. These visual indicators allow administrators to immediately recognize if the processor is pegged at maximum capacity or if the system is aggressively paging memory to disk.
The lower half provides a dynamic, scrollable list of all running processes, updated every few seconds. Unlike older utilities, htop allows users to scroll both vertically to view all processes and horizontally to see complete command lines, which is crucial for identifying specific applications causing trouble.
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