htop is a text-mode (console or terminal) process application for Unix systems. If we access the htop manual (man htop) there is no information on colors, other then how to disable them using the -C option discussed earlier. Member of Cell Three in the Atomic Accelerator program. Introduction. What means the column VIRT in this HTOP output? htop shows a frequently updated list of the processes currently running, normally ordered by the amount of CPU usage. Each bar represents a CPU core, and the colorful ticks inside the bar represent the load on that core. Tasks like finding and killing pesky processes can be easily performed without entering their PIDs, and the list of processes can be quickly sorted and filtered. Htop is a free (GPL) ncurses-based process viewer for Linux. (The actual duration of the scrub so far is 1:06:34 hrs.) Our task counts, load, uptime, and list of processes are still there, but we get a nifty, colorized, animated view of the CPU usage per core and a graph of memory usage.. Part 1. It plays three primary roles: htop is interactive via mouse and keyboard. It is a text-mode application and requires the ncurses library, it was developed by Hisham. Alike progress bars in CPU, Memory monitoring also contains progress bars with multiple colors. Following colors indicate the type of process: Red = Kernel process Green = Normal user process Blue = Low priority process. For example, let’ s say you want to search for the process ‘ firefox’ . Welcome to htop, the terminal based, full fledged task manager which can also be started in various distributions directly from the Desktop, bypassing the need to use a terminal. Green : Used memory Blue : Buffers Yellow/Orange : Cache If you are looking for an easy-to-use process manager, there is no question that htop is the best. It displays the % of CPU used at the end of the bar. Even if you are not familiar with htop, this article will introduce you to the great Linux task manager and it’s color key. Comments. By commenting, you agree to the terms and conditions outlined in our Privacy Policy. Htop, or Hisham’s top, is an interactive process viewer for Unix systems.With htop you are provided the same functionality as top, however it provides some needed improvements. All of these colors look much better then the alternative: htop without color coding: You can start htop in monochrome mode by invoking htop -C (uppercase C required, lowercase will not work) at the command line. NI: process priority reset by the user or root. USER: process owner. The htop color key may seem hard to find! Htop is very interactive, gives you additional information about running processes, and allows for manipulations such as sorting the list of processes using various criteria and search for a process/kill processes. Each column on the header represents the following: PID: process ID number. htop is unaware it is running on a kernel level virtualized environment (Dreamhost VPS is using VServer technology). Sometimes we all need a little help facing life's challenges. Note: There are few other color codes that are not explained here due to less importance. htop is divided into a few logical sections. Do you need to closely monitor containers and virtual systems on your computer? Shift + h: show/hide user and kernel processes. Press h inside htop for quick help. Introduction. A full CPU thread usage bar will be made up out of most of these types of processes – after all, your kernel is always running etc. Open a terminal and execute: sudo apt-get install htop htop. Green: It is the percentage of RAM consumed by memory pages. 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