How to Toggle Kernel Threads in htop on Ubuntu

This article provides a concise explanation for Ubuntu users managing system processes with htop. It focuses specifically on the keyboard command used to show or hide kernel threads, allowing for a cleaner process list during system monitoring.

The Shortcut Key

To toggle the display of kernel threads in htop, simply press the H key on your keyboard. This command works immediately while htop is running in your Ubuntu terminal.

Default Behavior

By default, htop hides kernel threads to prevent the process list from becoming cluttered. Kernel threads are internal system processes that often number in the hundreds. Hiding them allows you to focus on user-space applications and services.

Verifying the Change

When you press H, you will see the total number of tasks increase significantly in the header statistics. Pressing H again will hide the kernel threads, reducing the count back to user-level processes. This toggle helps you customize the view based on whether you need to debug low-level system activity or monitor standard applications.