ps is a command for printing information about running processes

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How to list only non-<defunct> processes?

Is there a combination of command-line options for ps or pgrep or some other relatively direct way to determine if a particular process name is actually running (available for normal use).. By ...
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141 views

Enumerating\writing files in a specific directory hangs the command

I'm communicating with a machine remotely through ssh. This machine runs a custom-built Linux and it has very limited set of commands. At some point, a specific directory refuses files to be written ...
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Why can't pgrep find scripts started via env?

For example: $ cat foo.sh #!/usr/bin/env bash while true; do sleep 1 ; done $ ./foo.sh & $ pgrep foo.sh $ Contrast with: $ cat bar.sh #!/bin/bash while true; do sleep 1 ; done $ ./bar.sh & ...
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ps switches to display PID, PPID, PGID, and SID collectively

I tried ps with different kinds of switches e.g. -A, aux, ef, and so forth but I cannot seem to find the right combination of switches that will tell me the Process ID (PID), Parent Process ID (PPID), ...
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-p and -o comm doesn't work together?

I'm trying to get CPU usage of a process by, ps -p 12990 -o comm=comm,pcpu But that only print the command name (the process does exist), what's wrong with it?
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Understanding ps elapsed time format for long running processes

I'm using a ps command as part of an exercise to identify processes running longer than a given threshold. I'm using the following template to get the elapsed time for a know process command: ps -eo ...
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Grepping a variable

I've written a simple init script to start and stop a Python script as a service. I have to be explicit about the version of Python I'm running, because this is on a CentOS 5 box with Python 2.4 & ...
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How to count how many shell/terminals are running?

I´m trying to count how many shell or terminal windows are currently running. I tried ps a|grep bash; ps a|grep tty; But it can be inaccurate.
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How to set what field names are displayed in listings?

When I execute a command in Ubuntu, which results in a listing, I get results without the field names. Example is ls -l or ps l. I am not very experienced and always need to go digging through man ...
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587 views

Capture complete process structure/stack

There are a lot of java processes running on the server, generally, we capture the PIDs of the java processes using command 'ps -ef | grep java'. In general, the java processes have a lot of jars in ...
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ps command not giving output in home directory

I am logging into a solaris server, switching to bash, then switching to another user "sruser" and switching to bash. /home/batch/sruser/ is the home directory of the user "sruser". The issue is ps ...
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Command line options of rackup are not shown in ps output or procfs

As you know if you wish to get command-line runtime arguments for running command you can parse ps -e or /proc/<pid>/cmdline. But I have encountered issue when this method returns only command ...
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Get process list with logical intersection of selectors?

The Linux ps command allows multiple selectors, such as user and command name, but always returns the logical OR of those selectors (more than I want). Does anyone know of a method or tool already ...
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327 views

HP-UX SZ limit for ps?

Right so I have a fun little thing that I'm deathly confuzzled about. I have a program that is running and I am getting the following: using top: SIZE RES 1639M 359M using ps: SZ 20171 ...
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62 views

Process history in Unix/Linux systems

I know that ps -efl shows running processes on *nix systems. I would like to check history of the (past) processes that have been run on a particular machine, preferably with all the information ps ...
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Can I get WCHAN from ps on Mac OS X 10.7.4?

From the manual it seems that ps -AO wchan should tell me what everything is sleeping on, but everything comes up as -. (And nwchan as 0). Did they do away with the old sleep()/tsleep() interface in ...
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why “ps -ef -u root -U root” also displays user processes?

ps -ef -u root -U root Also displays processes whose user is not root (the current user). Can someone explain me why ? -u : EUID -U : RUID
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Alternative to `pkill` or `pgrep -f` on cygwin?

Suppose I have starting my process like: java -DSOME_STRING -jar foo.jar Then on linux, I can use the following to find or kill this process: pgrep -f SOME_STRING pkill -f SOME_STRING However ...
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How can I get a list of long running processes that match a particular pattern?

I know that I can do ps aux | grep cgi to get a list of all cgi scripts currently running, and ps -p [pid] -o etime= can get me the run time for each pid; is there a way to combine the two, or better ...
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UNIX-, BSD-, GNU-options in Linux's ps command. Where are they from? [closed]

In the manual for the ps command on Ubuntu there is this text: This version of ps accepts several kinds of options: 1 UNIX options, which may be grouped and must be preceded by a ...
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How to show CPU time for processes via top without 'root' procs

Okay, So I've been attempting this for about three hours now without success. How do you search/display/use the top command (or ps command if it works...) to output a list of all procs, sorted by CPU ...
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Frequently used “ps” (process status) commands in linux? [closed]

EDITED: These are the the only most commonly used (and important) ps command options I've come across so far: $ ps ux, $ ps au, $ ps aux, $ ps U aahan, $ ps uU aahan So, is that all, or am I missing ...
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A more readable ps

Are there any tools that improve the readability of ps in the same spirit as ack for grep? This would be especially on OS X where ps does not even have options such as --sort user. So far the nicest ...
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What is the meaning of ps process names printed in [] such as [cgroup]? [duplicate]

when I do a command such as ps -aux on CentOS 6 I get a bunch of processes whos command is listed in [] as shown below. What is the meaning of the [] in the name? I am assuming that these are special ...
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What does a “[1]+ Exit 1” response mean?

I ran this command to try and get my python program to run in the background and let me exit the SSH connection I am using: nohup python files.py >> files.log & I then check ps to check ...
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How do I tell `ps` to use all available columns?

To specify columns, I can use ps's -o option: ps -o pid,cmd How can I tell ps to output all of its available columns?
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Print like Firefox

Made a CLI script to print Wikipedia articles: WIKI='https://en.wikipedia.org/w/index.php?title=' TITLE=$1 PRINTABLE='&printable=yes' SRC=$WIKI$TITLE$PRINTABLE HTML=$1".html" PS=$1".ps" wget ...
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Is “ps -ef” deprecrated?

I was doing some work on a linux and the system admin told me that ps -ef is deprecated though it still works. I can't seem to find any documentation towards the same. Has ps -ef really been ...
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Does this dispatcher produce zombie process?

I have such a dispatcher shell script. while read line do java TestProg $line & done < $tasklist On the zombie process Wikipedia page, it says if a parent fails to call wait, the ...
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How is it possible to sort ps command's CPU field?

I'm trying to make a small command that will find the processes that use the most CPU power. Firstly, I use ps aux > file.txt and then cut -c 16-20 file.txt | sort -n | tail -5. The result I get ...
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661 views

How to see process created by specific user in Unix/linux

I want to see list of process created by specific user or group of user in Linux Can I do it using ps command or is there any other command to achieve this?
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parsing process ID/names from /proc, thread IDs

When I'm parsing process IDs from /proc, obviously each thread of a process gets its own ID. And I realize that all the threads in that same process can be gathered from /proc/${pid}/task/. But my ...
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Does pgrep output ever include the parameters supplied to the process?

The snippet below (from an existing script) is used to check the xvfb processes and whether they are listening on a specific port: my_list=`pgrep -u $CurrentUserID -fl Xvfb | grep :${XVFBPORT}` ...
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How can I automate this manual task of finding a particular ancestor process from a given pid or command?

I know the full command "/bin/child_process" or its pid (3996 in this case) and I'm running ps auxf and then visually identifying its ancestor process /bin/parent_process foobar. root 3227 0.0 ...
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Translate GNU ps flags to standard flags

I'm using oh-my-zsh and its ssh-agent plugin on OSX, but lately somebody upstream decided to use ps x. I'm not entirely sure what that even does, since I haven't used a GNU userland in something close ...
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Among “ps” command output fields, %CPU isn't the actual CPU usage of the process?

For example, one of the output fields of this BSD style command, ps aux, is "%CPU". The alternative command, ps -efl outputs the "C" (or CP) field. As per the ps man page: %CPU is the cpu ...
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How is it that I can attach strace to a process that isn't in the output of ps?

I'm trying to debug why our integration tests are taking so long and it looks like they're hanging part way through. I logged onto our test service and saw the following behaviour: root@colossus:~# ...
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What is the difference in CPU utilization between 'ps aux' and 'ps -ef'?

I use Ubuntu 12.04.1 Linux. I see a difference between %CPU and C output format of ps command for a process. It is not clearly noted in the ps man page. Man pages says: CODE HEADER ...
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How to get start time for a defunct process on AIX?

When I run the following commands on AIX: 22:root@SERVER:/root # ps -ef | head -1 UID PID PPID C STIME TTY TIME CMD 22:root@SERVER:/root # ps -ef | grep defunct | head -1 ...
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“ps” output and comments

I'm pretty sure you cant do this but maybe someone has some weird hack... Is there a way to get comments (#blahblah) to show up in ps output? My problem is that i have a script, lets call it ...
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PS command ouput limited to 80 bytes only [duplicate]

Possible Duplicate: How can I get a full process list in solaris, without truncated lines? The output of ps command only returns 80 bytes. Below is the text from manual pages of Solaris ps ...
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Call 'ps' as a normal user in Linux

A brief introduction to my question: the command ps will print the information of system processes. But when I login as root and change the permission x of ps chmod -x /bin/ps chmod u+x /bin/ps ls ...
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How to find the PID of nginx process

I am trying to fix a problem with nginx and think that there is an nginx process running on my machine. When I run this command I get this output. $ ps aux -P | grep nginx 1000 3947 0.0 0.0 ...
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Why is apache2 showing up a defunct in the process list?

When I run top I see one line that doesn't look too good: 2475 www-data 20 0 0 0 0 Z 1 0.0 0:00.19 apache2 <defunct> Why is this process <defunct> and what should I ...
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How do use awk along with a command to show the process ID with the 'ps' command

I'm able to to show the PID (2nd) column with the below command, but instead I want to show pwdx <PID> and also the COMMAND(8th) column. Thanks in advance, Chirag ps -ef | grep runner | awk ...
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Using regex to see if a UNIX process is up

In UNIX, I am checking to see if a process is up by executing the following command; E.g. psg dtllst pe99 This returns the following output if the process is running; UID PID PPID C ...
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process id and killing process - ps commmand

Please see the output of below ps command: abc@smaug:~/Desktop$ ps ax | grep firefox 2213 ? Sl 2:01 /usr/lib/firefox/firefox 2644 pts/0 S+ 0:00 grep --color=auto firefox Please ...
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How to make sure the shell builtin echo is invoked so that its not visible in process list?

Is this going to be visible in the process listing if the below line is executed from a command line or a shell script bash -c "echo $password" or i just need to do echo $password from within ...
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Format ps output without whitespace

I have the following ps command to get particular properties of all the running processes along with some properties: ps --no-headers -exo "uname,ppid,pid,etime,%cpu,%mem,args" I wish to have it ...
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How to see what processes WERE running?

Is there a chance to get the processes that RAN before my system crash? EDIT What I really want is to see the past processes. My system crashed & I want to know if a specific process was the ...