Questions tagged [ps]
For questions pertaining to ps, a command for printing information about running processes. Use this tag for questions about ps itself or questions about issues arising from using the ps command-line utility.
640
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Does the p(rocess)s(napshot) support service exclude?
I want to use ps to show all processes except the some of them - exclude info about ssh or kthreadd processess.
Am I able to indicate processes I want to exclude?
The only supported way for now - non ...
- 57
1
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1
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59
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Process appears with square brackets ([]) around name after being SIGKILL'd
I am executing and killing a process as follows:
python some_script.py &; pid=$!; sleep 5; kill -9 $!; ps -o pid,sid,uid,state,start,command
In other words: I execute a script in the background, ...
- 285
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19
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Service load is high - service_process listed in top
I can't find any information on service_process which appears intermittently when server load is high.
Is there any information about this process? Is there a way to see which other process is using ...
- 533
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2
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516
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How can I use ps and pwdx both together?
I have a Top command that I use to see what's going on in my server:
ps -eo pid,cmd:50,%mem,%cpu --sort=-%mem | head 20
Basically it's using ps and removes a bunch of columns.
For each process id I ...
- 649
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19
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ps with custom output and separators [duplicate]
I get a list of running processes with a custom separator (;;;).
ps -o "%p ;;; %a"
Output normally is like this:
PID ;;; COMMAND
28819 ;;; bash
29752 ;;; ps -o %p xxx %a
This ...
- 549
0
votes
1
answer
92
views
Using grep with ps and column width specification
I'm trying to limit the column width of the command column when running a ps command, but also trying to pipe that output into a grep command. However, this is not working.
This runs fine:
ps -eo pid,...
- 103
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0
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33
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Why doesn't pid $$ refer to bash here? [duplicate]
In my Bash shell the $$ variable expands to the process ID of the shell.
So why does ps print its own name when I execute this?
$ bash -c 'ps -p $$ -o comm='
ps
When I follow it with a no-op command, ...
0
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1
answer
69
views
Introduce literal strings in PS command
I usually lauch this command:
ps -p 1 --format "command %c running from %t"
But last version in Debian 12, I can't:
ps -p 1 --format "command %c running from %t"
error: improper ...
1
vote
1
answer
54
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get PID by name
I'm running an autopilot on a closed environment running Linux, and I've got a kernel thread whose priority I need to change. I'd prefer not to patch the kernel for this. This thread is created early ...
- 150
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50
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why is process running on cpu core that is disabled in affinity mask
when I run taskset -p 242306 I got following output
3ffffffffffc000000000000000000000000000000000000000000038000000
sorry for the long string, there are 256 cores on the box.
used taskset -c -p ...
- 111
0
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3
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133
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Why does $0 and all arguments disappear from running bash script as viewed by ps?
I have a bash script (first line #! /bin/bash) called do-doruns that I invoke from the bash command line with ./do-doruns arg1 arg2 ...
That script in turns calls the script ./dorun a1 a2 a3 ..., and ...
6
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4
answers
2k
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Exclude ps itself from ps output
I want to get information about all processes in the system except the ps process itself.
That is, something like:
ps --no-headers --pid 1111 -N
where 1111 is the process id of the currently running ...
- 590
1
vote
1
answer
101
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Discover which process is asking for sudo?
I have a fairly long-serving Ubuntu 18.04 LTS desktop computer onto which I have installed a great many apt packages from mainstream and non-mainstream repositories as well as numerous random tarballs ...
- 11
7
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3
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1k
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Why does ps aux | grep <something> return extra hit [duplicate]
Let's say I want to know the PID of kate editor that is currently running (kate is just an example, it works as described for many programs). So, I execute ps aux | grep kate.
Here is the output:
...
- 165
2
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1
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98
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ps -aux -U "user" not filtering on user as expected
I have a quick question. I would regularly like to list all the processes running under my account on Linux. After reading the manpage, I thought I'd have to write:
ps -aux -U "joshua"
to ...
- 123
1
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0
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46
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Background process does not show up in ps
I used ssh to start a dotnet app as background job on a remote server
dotnet MyApp.dll &
I confirmed, that the app was running and then terminated the ssh session.
Now I want to kill this ...
- 111
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1
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130
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Why is a gap between `journalctl -k -b -0` and `ps ho lstart 1`?
I encounter a strange observation:
If I do: journalctl -k -b -0 | sed -e 's/^\(.\{76\}\).*/\1.../;3q'
I will see something like:
-- Journal begins at Sun 2022-08-07 12:06:55 CEST, ends at Mon 2023-02-...
2
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3
answers
145
views
Find all Processes Except These Specific Ones
Is there a ps or pgrep option or standard practice what will let me list all the running processes on a machine EXCEPT for a few specific ones I don't want to see?
Put another way -- let's say I have ...
- 1,423
0
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1
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159
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Search processes by executable name, excluding those without a TTY?
I'm trying to search for processes that have a given executable name and have an associated TTY.
My use-case is an attempt to identify running abduco client processes. Since abduco runs client ...
- 1,848
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1
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44
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maintain appended logs in separate file despite tail command termination
I have tomcat catalina.log file that keeps getting updated.
I wish to maintain its past 500 lines + any appended logs into a new file catalina.log_new for the next 2 hours.
To start off I run nohup ...
- 489
3
votes
1
answer
295
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Equivalent to "ps -p"
I'm using a board without the full ps command installed.
What I need is ps -p equivalent (something that sets $? if a specific PID is found or not).
Is there a way to accomplish this with another ...
- 323
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2
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2k
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What does the SPID abbreviation stand for?
The ps command with the -T flag outputs the SPID column, which is also called TID(Thread ID). But what does SPID stand for?
The ps source code doesn't seem to know why this name is either:
trace("...
- 31
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2
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597
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missing btime in /proc/stat how do i fix it?
what does misning btime mean?
# ps aux | grep ssh
missing btime in /proc/stat
I'm on an embedded system (ts-7600)running a Debian version via UART.
#uname -a
Linux ts7600-4aa86d 2.6.35.3-571-gcca29a0+...
- 3,537
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128
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how to print PID along with the process dump
I wish to combine both the below commands:
ps -ef| grep -v grep|grep java | awk ' {print "PID is:" $2}';
PID is:515
PID is:22145
PID is:32703
ps -ef| grep -v grep|grep java
wladmin 515 ...
- 489
-1
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2
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174
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FreeBSD ps command: is it possible to change output columns to match Linux format?
In Linux ps outputs:
UID PID PPID C STIME TTY TIME CMD
In FreeBSD similar but not the same output can be achieved by ps -lu or ps -ju commands. The problem with the latter is ...
- 11
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1
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128
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How may I uninstall the "ps" (process status) utility on a *nix system?
I have heard that ps (process status) can store users' commands history, like what shell history does.
Source: comment on StackOverflow,
Note that if the goal is to hide passwords in command line ...
- 3
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733
views
Recursively list child and parent processes as a tree for a PID
To get all child process in a tree format, you can run the below
$ ps -g 24154 --forest
PID TTY TIME CMD
24154 pts/4 00:00:00 bash
25745 pts/4 00:00:00 \_ ps
How can I get the ...
- 198
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0
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261
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ps command not showing full name of thread
When I have run ps command as below on a linux machine
ps c -wo %cpu,%mem,cmd:20 -L -p 137985
%CPU %MEM CMD
0.0 4.5 java
0.0 4.5 java
0.7 4.5 GC Thread#0
0.0 4.5 G1 Main Marker
0.0 4.5 G1 ...
- 113
2
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1
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401
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ps: show only processes owned by root, without showing kernel threads
I know how to hide kernel threads from ps:
/bin/ps --pid 2 --ppid 2 --deselect -o user:10,pid,stat,pcpu,pmem,tty,start_time,cmd
and I know how to show only processes owned by root:
/bin/ps -U root -o ...
- 483
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1
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285
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How to display process with status -R
I'm trying to output all processes with STAT field -R.
I tried following command but it is not best matching.
Any other way to display??
ps aux |grep R
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2
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216
views
How to see process ID of TCP?
When I want to see the process ID for an application I do ps -aux | grep <application>. For example, when I do ps -aux | grep ssh I see the process ID for SSH.
But when I do ps -aux | grep tcp ...
- 103
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4
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373
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lsof: print custom fields on one line
Using the -F option for lsof, I can specify which fields are printed:
lsof -w -F pcfn
However, the output is split on multiple lines, ie one line per field:
p23022
csleep
fcwd
n/home/testuser
frtd
n/
...
- 483
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2
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541
views
Best way to get resource usage information for a process?
What would be the best way to go about monitoring resource usage of certain running processes? For example if I wanted to generate log files of CPU and memory usage over time.
From what I understand ...
- 19
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0
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59
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macOS: ps's columns "nswap nvcsw majflt minflt" are always empty, values are correct in top
Is there a system setting to enable reporting "nswap nvcsw majflt minflt" for ps on macOS? These fields are listed in the manual installed on macOS, but their column is always empty (shows -)...
- 576
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1
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228
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How do I get process metadata for an exited process?
I'd like to read the process metadata for a process that has already exited.
Say I ran a command some-bash-command and it exited. A few hours later, in another shell, I'd like to get the metadata for ...
0
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0
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1k
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linux + huge of sshd: root@notty from ps
we cant access to one of our RHEL server VIA ssh
as
ssh $remote_machine
Last login: Sun Jul 24 12:37:25 2022 from ......
**login is HANG**
also when we did ssh $remote_machine "uptime"
...
- 12.8k
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0
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94
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ps | grep returns two PIDs [duplicate]
I am trying to write an init.d script, I am trying to kill a named node process:
kill $(ps aux | grep 'eproxy' | awk '{print $2}')
The problem is, when running just the ps command on it's own, I am ...
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278
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ps command: how does the '-q' option work?
According with the ps command, for the -q option
Through the man is indicated:
-q pidlist
Select by PID (quick mode). This selects the processes whose process ID numbers appear
in ...
- 1,580
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1
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416
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ps command: how show the complete command with options, pipes and redirection? (or all together)
About the ps command, consider if for simplicity:
in tty3 is executed the yes command
in tty4 is executed the yes > /dev/null command
through ps I need to show in the report the complete command ...
- 1,580
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1
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1k
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Network Activity on Mac OSX Monterey not showing all processes
My network activity is showing that I'm downloading huge amounts of data that are not showing up in my activity monitor. Is there a program I can use that actually works?
I tried launchctl list but ...
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1
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529
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ps command: how does the 'r' option work? How should be used?
About the ps command for the r option
According with man ps it indicates
r Restrict the selection to only running processes.
And according with ps --help a it indicates
r only ...
- 1,580
3
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2
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413
views
Why do X applications show a question mark as TTY in ps's result?
$ ps -ef | head -n 1 && ps -ef | grep calc
UID PID PPID C STIME TTY TIME CMD
user1 524014 5382 0 10:21 ? 00:00:01 gnome-calculator
user1 532125 510665 ...
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568
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Listing the process which are running for more than 3 hours
Note:
I have an older version of ps without the option to use -o etimes to get the times in seconds. So the solution of list-processes-that-have-been-running-more-than-2-hours cannot be used directly ...
1
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0
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215
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Process makes other processes hang
At some point, a number of scripts seemed to hang for no apparent reason. Running them manually still worked. I narrowed it down to a ps -ef that hanged. After a number of processes, output just ...
- 4,397
5
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0
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329
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Why does ps not exit when listing full command line arguments? [duplicate]
Any time I attempt to run the ps command or another similar command in a way that would make it output the arguments for any process, the command runs and produces output, but then freezes, entering ...
- 874
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2
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41k
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How do I list all background processes?
Is it possible to list all running background processes with the ps command, or is the only option for getting a list of background processes the jobs command?
- 175
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0
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33
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ps command: Practical difference between the -p and -q options [duplicate]
According with man ps exists:
-p pidlist
Select by PID.
This selects the processes whose process ID numbers appear in pidlist.
Identical to p and --pid.
-q pidlist
Select by PID ...
- 1,580
1
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1
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45
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ps command: strange behavior with 'O' option, extra column/header does not appear as expected
About the ps command - to add one/many extra column/header with the default headers according with the option(s) used with the ps command - it through O the option.
Intro
If ps x is executed the ...
- 1,580
4
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1
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2k
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ps command: how to know all the headers with their respective descriptions?
Through the following valuable tutorial:
Ps Command in Linux (List Processes)
If the ps -ef command is executed then the output has the following header:
UID PID PPID C STIME TTY ...
- 1,580
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0
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482
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What does '-x' mean in the context of the 'ps' command?
If is executed ps x (observe there is no -) then the output is as follows:
PID TTY STAT TIME COMMAND
2489 ? Ss 0:00 /lib/systemd/systemd --user
2490 ? S 0:00 (sd-pam)
...
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