htop is the new kid on the block, and it is powerful. NI: The nice value of the process, which affects its priority. Solution no. What does a C process status mean in htop? After doing so, and pressing 'F10', we can exit the setup tool. Htop is a free (GPL) ncurses-based process viewer for Linux. We hope this article is above your expectations. It allows us to monitor, troubleshoot, and kill processes running in our Linux systems. For instance, if we need to find the process running htop command itself, we can use the F3 key, and type in “htop” as shown below. Change ), You are commenting using your Twitter account. How to solve this problem? The fourth column shows the number of currently running processes and the total number of processes. Result Row #4. COMMAND: The name of the command that started the process. One might think it’s the number of currently logged-in users, either interactively or not (via ssh, for example). You can use the arrow keys and Page Up/Down keys to browse through the list. You can interactively monitor your system’s vital resources or processes in real-time. htop command allows us to customize the following things: Let us see an example to customise our htop console. The lower the number, the higher the priority. htop command allows us to sort the processes according to any particular column. See the Full Command Line If any column is surlpus to requirements it is simply a matter of deleting it by hightlighting it and pressing F9. N: The PID column. It is similar to top, but allows you to scroll vertically and horizontally, so you can see all the processes running on the system, along with their full command lines. Linux handles the killing of tasks automatically when the command or process exits. As you might have already guessed, you simply need to type this in to launch top:This starts up an interactive command line application, similar to one in the screenshot below. htop command allows us to monitor as well as kill any process. By default, the process list is sorted by the %CPU column. The iostat Command in Linux – Monitor and Generate CPU and Device Utilization Reports, The wall command in Linux – Everything you need to know. There are a few tools that can help to identify which process is the cause of this slow down. In the image below, the process list is sorted by the PID column. Tasks related to processes (killing, renicing) can be done without entering their PIDs. I have been trying to get an answer on what the red font represents in the detailed portion of HTOP. We will go through all aspects of htop one by one. Uniq command in Linux – What is it and How to Use it? It is a text-mode application (for console or X terminals) and requires ncurses. Our aim is add the information related to battery between Load Average and Uptime row. Any program in a system needs a help tab for beginners to get a grasp on it. While running tasks, load average, and uptime should be se… Each process title comprises of the following default information: These are the standard columns for the htop command. The pstree command in Linux – Display Process Trees, The expr command in Linux – Evaluate Expressions and Perform String Operations, The nohup command in Linux (with examples) – Run processes in the background, The cmp Command in Linux (With Easy Examples), The install command in Linux – Copy files, Create Directories, Change User permissions and File ownerships, The split command in Linux – Break large files into smaller files. The value against the bar denotes the percentage each core is being consumed. Feel free to share your thoughts below. In our today’s tutorial, we are providing the detailed information about the usage of htop command for system monitoring. How to use the Script command to record terminal sessions in Linux? There are more process-related attributes. A Step-by-Step Guide to Set up a DHCP Server on Ubuntu. For this, the filter option comes into play. In the above example, only those processes are listed that has ‘postgres’ keyword in their command section. Know what is happening in "real time" on your systems is in my opinion the basis to use and optimize your OS. Pressing the 'F6' key, takes us to the sorting screen, which looks like this: By default, the processes are sorted on the basis of CPU%. It looks just like this: Note: It may happen that htop utility might not be installed on your system. In our previous tutorial, we have demonstrated gtop. There’s a similar utility called htop that is much easier to use for normal tasks. Clicking it again leads to the sorting of elements in reverse order. I am using htop on osx and I can’t seem to find out what a ‘C’ status in the ‘S’ status column means for a process status. T: The TIME+ column. Most people familiar with Linux have used the top command line utility to see what process is taking the most CPU or memory. By default, htop shows colored status bars for processors, memory, and swap. The htop console changes swiftly as the processes do not wait for the user. Learning about the whatis command in Linux, Type Command in Linux – Everything you need to know, Syncthing – Install and Setup Syncthing on Ubuntu/Debian, LEMP stack on Ubuntu/Debian – A Step-by-Step Guide to Install and Deploy LEMP, Ulauncher – An all-in-one application launcher you should be using right now, System Monitor in Ubuntu – Brief Introduction. It can be considered as a Linux counterpart of Windows Task Manager. The color used in its output makes it much more comfortable to read than does the monochrome top output. Linux® is a registered trademark of Linus Torvalds. ( Log Out /  The bc command in Linux – How to Perform Mathematical Operations in Linux Shell? Understanding and using htop to monitor system resources. Instead of searching for keywords among numerous processes, it might be easier in some cases to only display those processes matching the keyword. Banner Command in Linux: What Is It And How To Use It? When I run htop (on OS X 10.6.8), I see something like this : ... Well, I might not have understood the meaning of the "VIRT" column then. I understand its meaning in the upper section but not the lower. Other than the options present in the footer, htop presents more options that can be accessed using keyboard shortcuts: Note: The reader must be aware that, 'K' and 'k' are different for 'htop' command. Selecting a process, and pressing the F9 key, leads to killing the process. Use multiple -o options when in doubt. The yum command in Linux – A Complete Reference, The dnf command in Linux – A complete reference, Z shell on Ubuntu – How to setup and use the Z Shell (zsh), Install and setup Minecraft on Linux – A complete guide, The exec command in Linux [With Easy Examples], The fuser command in Linux – Process management tool, How to Install Etcher on Ubuntu – A Complete Step-By-Step Guide. To make use of this awesome Linux feature, we type 'htop' in the terminal. The first three columns represent the average system load of the last 1, 5, and 15 minute periods. SHR: How much shared memory the process is using. TIME+: How much processor time the process has used. %MEM: The percentage of physical RAM used by the process. You can also just exit out by closing the terminal. You can solve this by deleting .config/htop/htoprc and starting htop on the computer with the most cores of the one you use. Article by AlexioBash published on his website about ArchLinux in italian. 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