-1
votes
1answer
46 views

Which is the most precise command to get processes and system information? [closed]

I'm trying to evaluate performances of some active processes of mine on linux. Searching the internet I found that ps and top are the only command available for that. More precisely here, it says ...
2
votes
1answer
98 views

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 ...
1
vote
2answers
63 views

Add sid field to ps -f output

I am reading the ps man page and there is something I don't understand. -f does full-format listing. This option can be combined with many other UNIX-style options to add additional columns. ...
2
votes
2answers
2k views

What does aux mean in `ps aux`?

ps aux seems to conveniently list all processes and their status and resource usage (Linux/BSD/MacOS), however I cannot comprehend the meaning of parameter aux using man ps. What does aux mean?
0
votes
2answers
104 views

Calculating CPU time of process in RHEL 5.3

For a process management,I would need to remove a process that exceeds a certain amount of CPU time, for example 1 hour.In PS command ,it has TIME parameter shows the total CPU time of a process .So ...
2
votes
3answers
195 views

ps: full command is too long

Good day! I use 'ps' to see command that starts process. The issue is that command is too long and 'ps' does not show it entirely. Example: I use command 'ps -p 2755 | less' and have following ...
2
votes
1answer
345 views

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 ...
2
votes
1answer
212 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?
3
votes
3answers
155 views

Is there a way to select by several conditions in `ps`?

It seems I am missing something blindingly obvious, but still: ps -f -u myuser --ppid 1 Seems to only take a look at parent pid of the process, and returns all the processes that have parent pid of ...
3
votes
1answer
166 views

init: is it a user thread or a kernel thread?

init is the first task executed after kernel is loaded, right? Then who is its owner. also I can see [swapper/0] [swapper/1] ..... [swapper/7] having pid 0 PID PPID CPU TASK ST %MEM ...
2
votes
1answer
320 views

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 ...
13
votes
5answers
2k views

Can ps display only non kernel processes on Linux?

How can I ask ps to display only user processes and not kernel threads? See this question to see what I mean...
0
votes
1answer
213 views

What is the meaning of “\_” in output of 'ps ef'?

When I executed ps ef command in a linux server, I saw that one of the command starts with \_. For example, \_ /bin/sh /usr/ Could any one please let me know what is the meaning of \_ in this ...
5
votes
1answer
126 views

Find all users who have more than N processes and echo them in shell

I'm writing a script in ksh. I need to find all users who have more than N processes and echo them in the shell. N is read from ksh. I know that I should use ps -elf, but how do I parse it, find ...
3
votes
1answer
2k views

Linux : See CPU usage by a process for the last second

vmstat 1 Above will print virtual memory statistics each seconds. It will also show the CPU utilization for last second. I have a web server at hand which runs httpd and MySQL. I need to find how ...
14
votes
2answers
680 views

When was a process started

To know when was a process started, my first guess was to check the time when /proc/<pid>/cmdline was written/modified the last time. ps also shows a START field. I thought both of these ...
0
votes
0answers
32 views

How can I see a process' thread count? [duplicate]

Possible Duplicate: Is there a way to see details of all the threads that a process has in Linux? I want to see the thread count which belongs to a process in linux. What command should I ...
8
votes
2answers
203 views

Look for a process with a given name

I am trying to convert the VMS command show/system/process=processname into an equivalent Linux command. I tried the following but it returned none of the processes: ps -C /exeimages/processname.pl ...
1
vote
1answer
177 views

Linux + Solaris how to verify the last execute process from list of process

I need advice: How to verify which is the last scan_sys.sh process that run in my linux or solaris ? my target is to kill all scan_sys.sh process , except the latest scan_sys.sh ( the last execute ...
1
vote
1answer
502 views

Bafflingly baroque Debian ps: show threads in forest tree

My favourite ps invocation is: ps -efww ef as I need to watch all processes (-e), get extended information about them (-f), see the environment (e) they operate within, wrapping lines (-w -w) so I ...
4
votes
1answer
1k views

Difference between poll_s and ep_poll WCHAN in ps output

When I issue ps -elf|grep python for example on my system, I see these: 1 S 1000 6020 6008 0 80 0 - 9914 poll_s Jul12 ? 00:00:01 python manage.py run_gunicorn -t 3600 -w 8 -b ...
0
votes
1answer
696 views

The TIME field in ps -ef

When I do ps -ef, I see "TIME" field. What does this field mean? From what I understand, this tells the actual CPU time, that the process got (amidst all the context switching). Does the TIME field ...
2
votes
1answer
2k views

Mathematical connection between SZ RSS and VSZ in ps o/p?

I wanted to know what mathematical connection is there between the SZ, RSZ and VSZ output in ps output e.g. ps -p 2363 -o sz,rss,vsz
2
votes
1answer
6k views

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 ...
4
votes
2answers
299 views

How to list all running X applications?

I'd like to get a list of all of the apps (across all users) on my machine that are talking to the X server. What's the most reliable way to do that? Find the socket X runs on and lsof for connections ...
1
vote
4answers
707 views

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 ...
5
votes
5answers
1k views

Piping PS output into a Text file

So what im wanting to do is pretty basic.....but im not sure how to go about it. Lets say I have a program running, but I want to pipe the output of ps -C "ProgramXX" into a file. Normally Running ps ...
5
votes
4answers
3k views

Solaris ptree style tool for Linux

I'm looking for the Linux tool that will print the same output as the Solaris ptree. For example: # ptree 538 538 /usr/lib/ssh/sshd 889 /usr/lib/ssh/sshd 890 /usr/lib/ssh/sshd 1498 ...
10
votes
2answers
618 views

Which to choose - BSD or Unix-style commands where available?

Commands like ps come with a lot of parameters, especially because they give the use an option to choose between Unix and BSD style flags. I hope you get my point here. So, when there's such an ...
2
votes
2answers
1k views

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 ...
6
votes
2answers
3k views

killall gives me `no process found ` but ps

Could somebody explain to me the difference between kill and killall? Why doesn't killall see what ps shows? # ps aux |grep db2 root 1123 0.0 0.8 841300 33956 pts/1 Sl 11:48 0:00 ...
10
votes
4answers
20k views

Show top five CPU consuming processes with `ps`

How to show top five CPU consuming processes with ps?