Type man ps in your terminal to read the manual for the ps command, which has a complete reference for all options and their uses. If you specify more than one of these options, then all processes which are matched by at least one of the given options will be displayed. You can choose to display a certain set of processes by using any combination of options (like -A -a, -C, -c, -d, -E, -e, -u, -X, -x, and others). CMD returns the name of the command that launched the process.TIME returns the total amount of CPU usage.TTY returns the terminal type you're logged into.This will display the process for the current shell with four columns: To test this, just open your terminal and run the ps command like so: The ps command displays your currently running processes in real-time. You can list running processes using the ps command (ps means process status). How to List Running Processes in Linux using the ps Command Likewise, when you run a command in the terminal (like curl ), it creates a process that will only stop when the command finishes executing or is terminated. Basic knowledge of navigating around the command-line.Ī process is an instance of a running computer program that you can find in a software application or command.įor example, if you open your Visual Studio Code editor, that creates a process which will only stop (or die) once you terminate or close the Visual Studio Code application.Have you ever wondered how you can check all the programs running on your machine? Then this article is for you, as I'll show you how to list, manage, and kill all the running processes on your Linux machine. So multiple programs can run at the same time. One beautiful feature of the Linux operating system and of modern computers in general is that they provide support for multitasking. These applications can include a browser, code editor, terminal, video conferencing app, or music player.įor each of these software applications that you open or commands you run, it creates a process or task. There might be other solutions, but atop is easy to understand and use and a good start before doing some more bespoke setups.Every day, developers use various applications and run commands in the terminal. You have then access to all 'top' like functions (sorting/looking at memory/CPU/IO usage, etc.) and you can jump 10 minutes forward in time via 't' and 10 minutes back with 'T' or jump at a specific time via 'b'.Ĭheck out the atop manpage and google has lots of howtos about it. The more interesting part is: Once installed a daemon starts logging data into /var/log/atop and you can read these files with atop again: atop -r /var/log/atop/atop_20160128 You can use atop like a normal real-time top utility, with slightly different behaviour (check out the manpage for keystrokes). atop is very good at this, at it takes care of logfile retention.Ītop is available via the EPEL repo for CentOS/RHEL/Fedora and via the default repos of Debian/Ubuntu. Better it would be to use a specialized program, which does this for you. You could use cron to write the output of ps (and other commands) every x minutes into a logfile. use a script which writes needed data on a regular basis to a logfile.
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