![]() ![]() Normally when you are looking to kill a misbehaving program, you search for all the program occurrences, get their PIDs and use the kill command to end the process. One of the essential use of the ps command is to get the process ID (PID) of a running program. You can combine with option f to get the full listing. You can also categorize running processes by group instead of users by providing group name or group id: ps -G group_name_or_id To get the information about all the processes run by a certain user, you can use the -U option with the user name: ps -U user_nameįor example, I can see all the processes running by the root user like this: ps -U rootġ0 ? 00:01:22 rcu_sched 5. See all running processes by a certain user You can also combine the H option to see all the processes in a threaded view with child processes under their parents: ps -efH 4. I told you, ps is a messed up, complicated command. ps -efĭo note that – before e is important otherwise, it will show a different result. The common practice is to combine it with the option -f to get the full listing of the commands used to run the processes. See all running processes with ps -ef command in LinuxĪpart from ps -aux, you can also list all the running processes with -e option. Thanks to the -u option, you can identify which process belongs to which user. The command output is the same as ps -ux but now you have processes from other users as well. With the added -a option, you can see the running processes by all the users on Linux system. You’ll probably see ps -aux or ps aux all the time in Linux tutorials and documentation. See all running processes with ps aux command ![]() RSS shows how much memory the process currently has in RAM while VSZ is how much virtual memory the process has in total. It is usually accompanied by option u in this manner: ps -ux You can find a detailed table in the man page of the ps command.īut you’ll rarely see ps command used with just option x. The STAT in the above output means Process State Codes. I have truncated the output because it had hundreds of lines: PID TTY STAT TIME COMMANDĢ245 ? S 0:00 /usr/bin/ssh-agent -D -a /run/user/1000/keyring/.sshģ039 ? Ss 0:00 /lib/systemd/systemd -userģ054 ? SLl 0:01 /usr/bin/gnome-keyring-daemon -daemonize -loginģ059 tty2 Ssl+ 0:00 /usr/lib/gdm3/gdm-x-session -run-script env The – before option x is optional, but the general Linux convention is to use – before options, so I advise you to keep on following it. The x option will display all the processes even if they are not associated with current tty (terminal type) or if they don’t have a controlling terminal (like daemons). If you want to see all the processes run by you, you can use the ps command with options x like this: ps -x Let’s see some better examples of the ps command: 1. ![]() Now, this doesn’t really provide any real, useful information. CMD is the command that you run to launch the process.TIME gives you how long the process has been running.TTY is the type of terminal user is logged in to.PID is the unique process ID of the process.I have sent Gedit command in the background this is why it shows three processes otherwise you will normally see just ps and bash. If you use the ps command without any options in Linux, it will show the running processes in the current shell: ps This is why I will show you some of the most common and useful examples of the ps command in Linux. You can understand its strength and complexity. The ps command is an extensive tool and has over 80 command options. You can get information like process ID (PID) for the processes you or any other user is running on the same Linux system. The ps command in Linux displays running processes on the system.
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