Questions tagged [ps]

ps is a command for printing information about running processes

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35 views

Ps aux u shows little CPU usage, but sys_getloadavg() has 3.34

Some time ago our site had been hacked, and we were able to recover successfully, however there still seems to be something weird that we havent got rid off yet. Once per hour, there is a job starting ...
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15 views

performance monitoring of “iptables” kernel module

I woul dlike to know, how much CPU / memory my current iptables rules consume. I tried looking in ps and htop, but even with kernel threads displayed, I don't see anything related to iptables. How ...
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39 views

Linux sorting by using /proc command

how can I instead of that command use /proc to do the same action? $ ps aux --sort pid
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10 views

plist-sz value not matching with actual process running

My plist-sz (sar -q) value is around 28000 but when I check ps -ef |wc -l it shows only around 300. What could cause high value of plist-sz?
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1answer
32 views

Getting different value for ps command when assigning to a variable

I get a different output when I assign this to a variable. Why is this? #!/bin/bash P=$(ps -ef | grep ${APP} | grep -v grep | wc -l) echo ps -ef | grep ${APP} | grep -v grep | wc -l echo $P Output:...
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Get data about system load in an easy-to-process format

Often I feel the need to run some computation on the data about my system load. For instance about the data that top shows. And possibly iotop and htop as well. Some of the things I'd like to do are ...
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1answer
29 views

Apache uses 9GB of RAM but htop only shows 2.7GB of used RAM. Why?

My website is very slow at some times of the day, and I'm on the quest of finding out why. I'm currently looking into Apache memory usage and I have 2 tools that are supposed to tell me how much RAM ...
2
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1answer
41 views

ps command: list processes by group id

Here is what I get when I list all processes with -g option: ps -g -o pid,pgid,ppid PID PGID PPID 112140 112140 112139 127467 127467 127466 130547 130547 112140 130551 130547 130547 130557 ...
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2answers
58 views

Command to display only running processes in Linux

Can anyone provide the Linux command to display only the running processes? They should be only running and not in sleeping or other states. Can we achieve it with the ps command? I know ps- aF ...
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61 views

PS shows different RSS value from Pmap and Smem

I want to get the memory consumption by a process. I am using RSS parameter to determine it. I am getting same RSS value when I am using pmap -xx <PID> and with smem tool. But when I am using ...
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0answers
28 views

Full width of cgroup in “ps -w -w -e -o pid -o cgroup -o cmd”?

ps -w -w -e -o pid -o cgroup -o cmd shows cmd in full width, but cgroup is truncated: ... 6598 11:devices:/user.slice,6:pi /usr/bin/gnome-screensaver --no-daemon ... Why is that? I know that ...
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46 views

List top 5 processes for a specific user

I am trying to get the top five processes of a specific user in a bash: ps -Ao user,uid,comm,pid,pcpu,tty --sort=-pcpu | head -n 6 | grep <username> However, this selects the top 5 processes ...
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1answer
36 views

From where does “ps” on Android get user names?

I have an Android tablet that I got a terminal program from Google Play Store. When I issue the "ps" command, it shows various names for the users running the processes. There is no /etc/passwd file ...
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1answer
78 views

How to get list of processes from N days ago from ps output

How to get list of dates from an output of ps command to only show those processes beyond 30 days? My goal is to kill these processes. I can easily do this by killall command. E.g. killall -u user --...
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1answer
63 views

What is mean `alloc factor 0.900000 0.900000` after using 'ps -A | firefox'?

My browser stopped responding. I closed firefox, and tried opening it again. Firefox did not run, so I typed ps -A: 7122 ? 01:07:56 firefox-esr I'm not killing this process, and type: ps -...
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2answers
32 views

Is there a way to get the union of `ps a` and `ps x`?

I would like the union of the processes returned by ps a and the processes returned by ps x. When using Docker and nohup, it feels like one or the other of them works, but neither always shows the ...
9
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1answer
636 views

Explain why watch 'jobs' does not work but watch 'ps' work?

jobs is my favorite command to see my codes which are running in the background. In order to check for them dynamically, I tend to type watch 'jobs' which does not display anything. However watch '...
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28 views

Can I get a process id and run the program in the foreground?

Can I get a process with an id, for example a python script and run the program in the foreground to get the output of the program? The problem I have is that the output from the processes I get is ...
4
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1answer
285 views

Processes in a session in an interactive shell vs in a script

If I run this command in a script it doesn't produce output except header from the ps: # Taken from Advanced Bash Usage on youtube: echo "$(echo "$(echo "$(echo "$(ps wwf -s $$)")")")" This is ...
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77 views

What does it mean if a process has an O or an I at the start of the line?

After running ps, I noticed that a couple of the processes had an O at the start of the line. In all my years, I've never seen this. I thought that the meaning of the indicator might be common ...
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71 views

PID and process counts do not match from ps with grep output

Using: Red Hat Enterprise Linux Server release 6.10 (Santiago) Scenario: I am trying to automate a process that will capture running processes and put the PIDs and processes into their own arrays, ...
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1answer
182 views

How can I know if a process is running background or foreground in “ps” or “ps -ef” command output?

How can I know if a process is running background or foreground in commands ps or ps -ef? I first thought that when I type in ps -ef, there is a section named TTY. when I look into the list of TTY, ...
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1answer
71 views

Bash script to count number of executions instances does not work

I am writing a script that detects if there is any instance of it already running on my Linux machine and shows on screen the number of instances. The content of the "detect_itself.sh" script is: #!/...
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1answer
115 views

What does task status PA refer to?

I am looking into a crash dump for RHEL 7.4. It shows some of the task status as PA. for the command - crash> ps | grep sample - 31718 31717 3 ffff8806873a6eb0 **PA** 0.0 42260 8040 ...
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Can a process group exist without a process group leader

Saying that I have two bash scripts as below: #!/bin/bash # this is test.sh ./test2.sh and #!/bin/bash # this is test2.sh while : do sleep 2 done After executing the test.sh with the command ....
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1answer
79 views

Command in a bash script has no effect

I have put a command in a bash script to kill processes as below #!/bin/bash kill -9 $(ps ux | grep 'fluent' | awk '{print $2}') As I run the script, e.g. ./mykill, it has no effect $ ps ux | grep ...
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1answer
49 views

Stop multiple processes from command line correctly

I'm executing the following command on mac ./node_modules/.bin/webpack --watch & nodemon dist/server.js I tried killing the processes using Ctrl+C however i still notice that node processes are ...
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1answer
835 views

how to avoid garbage option error on grep command

i need to check whether a process is running or not on server. But challenge is , the keyword I am using is not the userid , it's part of the o/p or ps command. When i am running as ps -ef | grep -v ...
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1answer
322 views

How can I list information about a thread/LWP by `ps`?

How can I list information about a thread/LWP by ps? Why can't I do that simply by: $ ps 10173 PID TTY STAT TIME COMMAND $ ps -L 10173 PID LWP TTY STAT TIME COMMAND The best I ...
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2answers
408 views

sleep command using screen command is not displayed in ps

I'm running the sleep command in terminal using screen and in detached mode. Once the screen immediately returns, I'm running ps command to verify the sleep is running. $ screen -d -m 'sleep 2m' [raj@...
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2answers
72 views

ps --sort: List process active for more than 24 hours

The command ps -ef | grep frmweb gives a huge list for me, which I want to filter: weblogic 687 80703 0 08:58 ? 00:00:03 /opt/weblogic/product/fmw/bin/frmweb webfile=HTTP-0, weblogic 2129 ...
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85 views

What ps WCHAN sync_b means?

I have this ps output: F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD 0 D root 30394 30390 0 80 0 - 25731 sync_b Apr07 ? 00:12:22 du -sh /poze/output ...
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2answers
62 views

How do ` -f` and `-o` interact in `ps`?

How do -f and -o interact in ps? They shouldn't work together, according to ps: output modifiers vs output format control and https://unix.stackexchange.com/a/446198/674, since -f implicitly ...
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2answers
1k views

What processes do `ps f` show?

by ps from procps-ng $ ps f | wc -l 225 $ ps -e | wc -l 410 $ ps | wc -l 4 ps -e shows all the processes and ps only those with current terminal as controlling terminal. What processes do ps f show? ...
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1answer
70 views

How can I view threads for a running process that is creating threads?

I made a very small program that creates two threads: #include <pthread.h> #include <stdio.h> #include <unistd.h> void *start() { printf("Am a new thread!\n"); ...
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115 views

Linux ps command show a wrong time

When I use ps axo pid,lstart,command it returns the wrong time for eg.: 27936 Tue Oct 15 13:45:51 2019 This is a future time. System clock seems fine. Do you have any suggestions to search for the ...
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1answer
515 views

AIX 7.2 Topas show high CPU

When I execute topas for a certain process, in the CPU% column it shows me 43% and jumping to 85%. When I execute: "ps aux | grep processName" The same process is at 5%. What is more accurate? I ...
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2answers
300 views

How to find process by exact command?

This is the list of my processes: $ ps PID USER TIME COMMAND 1 root 0:00 bash -c cp -R /docker /var/lib; echo Loading...; wrapdocker 7 root 0:00 bash --login 312 root ...
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1answer
261 views

What is the meaning of the R/D flag in ps output?

What is the meaning of R / D from ps ax? Does it indicate a problem? 3 ? R 522:45 [ksoftirqd/0] 4380 ? Rl 1240:31 gdm-session-worker [pam/gdm-launch-environment] 5938 ? ...
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1answer
42 views

awk + how to capture the third field on both characters

from ps ax we get the following output ps ax PID TTY STAT TIME COMMAND 1 ? Rs 611:56 /usr/lib/systemd/systemd --switched-root --system --deserialize 21 2 ? S ...
2
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1answer
82 views

Red Hat Linux - port is in listening state but could not find process ID

I have this problem for my application, port is in listening state but process ID is not showing up. Used below commands. This is cloud AWS server Red Hat Linux. $ netstat -tulpn tcp 0 ...
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2answers
291 views

How convert bash output to JSON with key {#PROCNAME}?

I try get JSON with top 5 process by memory. This JSON i want send to Zabbix and draw top 5 process by memory. I get top 5 process by memory by command: ps axho comm --sort -rss | head -5 node ...
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0answers
37 views

How to store output(data) in csv format? [duplicate]

I am making process monitoring application. Now my need is To get process related data(pid, process name, cpu usage, memory usage and virtual memory usage). After completing first step I want to ...
2
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1answer
304 views

PID full path to executable in macOS Mojave

ps axww -o command This command gives me the "command" used to run the process. It also includes the "path" to the executable. I need ONLY the path. The problem is it also includes arguments with the ...
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2answers
3k views

Why does the command ps not display the entire list of processes?

If the command ps awx | grep -v grep is run the following output is produced. The list below is the last 20 lines of the complete output. 4247 pts/1 Ss+ 0:00 /bin/bash 4442 ? S< ...
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1answer
39 views

File manager instances not showing among running processes

I've over 10 windows of a file manager (Thunar, on Xubuntu Core 18.04) open, but ps aux|grep thunar shows nothing (except for the grepped string). Why? ps -e doesn't not show anything either. EDIT: ...
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1answer
91 views

Process appear by “netstat” but doesn't appear by “ps -a”

I have a machine in my organization that I sshed and received a terminal. When I run netstat -ntlp I received: [root@webtl1 ~]# netstat -ntlp Active Internet connections (only servers) Proto ...
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1answer
104 views

is it possible to avoid open files? [closed]

when we run lsof to capture deleted files , we see the following: ( example ) lsof +L1 java 193699 yarn 1760r REG 8,16 719 0 93696130 /grid/sdb/hadoop/hdfs/data/current/PLP-...
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1answer
155 views

How to kill and rerun process in one command in Linux

Usually, I use the ps command on Linux to find the pid of the process, then I kill the process using this pid and after that I rerun the process with some specific command for this specific process. ...
2
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1answer
330 views

why sometime need to stop process by kill -9

we have kafka machines in hadoop cluster the script that stop the kafka process do the following kill PID but we notice that the script that stop the kafka not really kill the process therefore we ...