There’s a similar utility called htop that is much easier to use for normal tasks. M: Sort processes by memory usage P: Sort processes by processor usage Access help k: Kill current/tagged process F2: Setup htop. Green : Used memory Blue : Buffers Yellow/Orange : Cache Tasks related to processes (killing, renicing) can be done without entering their PIDs. Htop is an interactive and real time process monitoring application for Linux which will show you your usage per cpu/core, as well as a meaningful text graph of your memory and swap usage. For example, if your computer has 8 cores, there will be 8 bars. In a nutshell, htop is a useful command-line tool in the Linux environment to determine the cause of load by each process. The latest releases in htop include pressure stall information for Linux, ZFS ARC statistics, more than two processor columns, as well as many other features and bugfixes. Hi. Just press Enter to use the process ID of the task at the top of the process window. However, since htop is a newer program compared to top, it offers many improvements. Our wide-ranging programs offer real world solutions designed to give people of all ages a chance at long-lasting success. Blue : Low-priority threads Green : Normal priority threads Red : Kernel threads Turquoise : Virtualization threads Memory. sudo apt-get install htop. In this tutorial, I will show you how to install and use htop on CentOS 8/RHEL 8 Linux. Even if you are not familiar with htop, this article will introduce you to the great Linux task manager and it’s color key. 1.0 INTRODUCTION. Is Your Linux System Memory, CPU or IO Bound? If you are a little familiar with Linux, you are familiar with the top and ps systems for viewing ongoing processes. What would normally cause the cached memory to increase so much while the used memory (green) stays pretty low? Finally, the swap bar has only a single bar color, red, indicating how much of the swap file, or swap partition is in use. (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.. To install sudo apt-get install htop To run htop. htop is the tool you’ve been looking for. I believe the number displayed by htop is a more meaningful metric of resources used: the number corresponds to the green bars; the blue and brown bars correspond to buffers and cache, respectively (as explained in the Help screen accessible through the F1 key). While top command takes few seconds delay to collect data where htop is much faster. Here's what the different colors mean (you can also get this information by pressing h for "help"). The bar itself will shows low-priority in blue, normal in green, kernel in red. Save my name, email, and website in this browser for the next time I comment. All Rights Reserved. Open a terminal and execute: sudo apt-get install htop htop. Here are some shortcuts to configure htop output interactively. Note: There are few other color codes that are not explained here due to less importance. But htop may not be a familiar name to you. For example, the memory bar has orange whereas the CPU threads do not. Putting monochrome output on the side and returning to our more pleasant colorful and default htop output, what do each of the colors signify? Open during COVID-19 Outbreak. Notify me of followup comments via e-mail. But what we can use in Linux? Looking at the bars and statistics for memory (Mem), swap (Swp) and CPU threads (1 bar per thread), we quickly see that a large variety of colors is used to provide more detailed information about each component and it’s status bar. Next we can see the Memory (Mem) bar – made up out of green, dark blue and orange bars. The answer is to press the F1 key which will lead us to a small help screen with the color key as well as some handy keyboard shortcuts: For the CPU threads usage Bar, the dark blue bars are low-priority processes, the green bars are normal processes, the red bars are kernel time and (though you may not see this), the aqua colored bars are virtualized processes, when present. Introduction. Knowing what colors are used by htop enables one to better understand the rich information htop is providing. Most are in areas where top shows some of its age; for example, in htop you can scroll the list of processes vertically and horizontally to see all the process info. The number of bars depends on the number of cores your CPU has. Htop is an interactive and real time process monitoring application for Linux which will show you your usage per cpu/core, as well as a meaningful text graph of your memory and swap usage. Google Photos announces end of free unlimited photo backups starting June 2021 Just like the CPU, these rows have colorful ticks that represent the amount of memory being consumed by processes running on the computer. htop is quite similar to the top command. It is a text-mode application and requires the ncurses library, it was developed by Hisham. From Lone Wolf to Organised Crime – Where Cyber Threats Come From. The answer is to press the F1 key which will lead us to a small help screen with the color key as well as some handy keyboard shortcuts: For the CPU threads usage Bar, the dark blue bars are low-priority processes, the green bars are normal processes, the red bars are kernel time and (though you may not see this), the aqua colored bars are virtualized processes, when present. In this article, we will fully introduce this software to you. 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