Ubuntu :: Ssh Banner With The Number Of Currently Running Processes?
May 18, 2010
I would like to do the following: Create a banner for any user logging in through ssh which warns him/her about the number of processors being used already by other users (or conversely the number of free processors). For example, if a user logged in he would then see a message like: Warning! 7 out of 8 processors are in use.I already figured out how to do a banner and with ps -e -o pcpu I can get all processes' %CPU usage. I think I would like to count the number of processes which have more than 90% CPU usage and output this number ("7" in the example) in the banner
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Mar 6, 2011
I'm trying to get the end result to have the same format as this as well:
1 bin
2 daemon
67 erozner
[code]....
Where the numbers are the number of processes being run by the user (the name right next to it).if I input the command egrep myFile into the terminal, it should look for every line with the letter x in myFile, right?
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Oct 24, 2009
Optimum number of processes for procesor In Linux based os are there a optimum number of process for a processor that gives 'maximum performance' for system(or process range depend on cpu speed,cache etc...)? By 'maximum performance' I mean better performance?
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Feb 28, 2009
Code...
I don't know how to increase the number of url_rewriter processes.
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May 26, 2010
I'm in the process of writing a program that is a server- it will accept connections and stuff, and spawn a child process for each. However, i've run into a small problem. I do NOT want to bother with keeping track of the processes unless i need to. So, i set SA_NOCLDWAIT (#ifdef) on a SIG_IGN to the SIGCHLD handler through sigaction interface. The standard says that it the kernel will then keep track of reaping zombie processes for me (a HUGE plus). However, upon receiving a SIGINT signal, i want to stop the server from accepting new connections (done), and then wait for there to be no new connections. I was thinking of just putting a loop like so:
Code:
while((wait(NULL) != (pid_t)-1) && errno != ECHILD);
However, I'm not *sure* that this will work, especially with SIGCHLD still ignored. So how can i tell if there are still child processes? I can't find any call like int getnumchld(pid_t proc); (i wish). Plus it would be inefficient to spin on that function anyway. OTOH, i would rather *NOT* have to do the same thing in a loop with a system("ps |...>file"); read(file); etc. either. Is there a way i can portably implement this feature (I was hoping i could run it on linux and the major BSDs, at least).
TO SUM IT UP:
How can i tell if a process has no child processes if i've SIG_IGN'd SA_NOCLDWAIT'd the SIGCHLD? Is there a _reasonably_ portable way to do so? I *don't* want to manually wait for EVERY process. Maybe only those still active at the time of SIGTERM, but that requires keeping track of the number of connections and whether those have terminated...
EDIT: Does anyone know if the above code *would* work, even with SIGCHLD ignored and the kernel cleaning up zombies *for* me? I checked the manpage and it doesn't say much.
EDIT1: Note that all of the processes are in the same process group and session. SO i can find them through this as well. Perhaps even setting the uid/gid and finding all processes run by that group?
EDIT2: i have an idea if the above isn't feasible. If there is no "elegant" way to do it, i could reduce the complexity by sending a SIGUSR1 to the whole process group. Each process would then set a flag telling it to send a SIGUSR1 in reply and send a SIGUSR2 when it is done executing. Then i could keep a count of signals. Maybe that would be *easier*. Or perhaps a count of all child processes and just a termination signal to decrement the counter.
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Jun 29, 2009
I know of /etc/security/limits.conf and that can be used to limit all sorts of good things, but I haven't found anything that talks about using this when the users come from LDAP. Would I be able to do something like
@"Domain Users" soft nproc 25
@"Domain Users" hard nproc 40
where Domain Users is the group all users belong to in our system.
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May 7, 2011
To: The Cog >>>
Code:
The Cog, heres the reszults for ps -ef | grep tty:
yo mama@blah:~$ ps -ef | grep tty
[code]....
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Feb 8, 2011
Ubuntu 10.10. I am curious if there is kind of task manager in ubuntu I can see running processes etc? Like windows task manager?
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Mar 15, 2011
When I ps -e, I see a whole bunch of processes, many more that when I ran Slackware.Is there a list of processess I can look at to see what they are and what ones I dont need, instead of googling each one and getting some cryptic explanation?
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Jun 6, 2010
GNU/linux kernel 2.6, Slackware 12.0.Hi:How do I know what processes are running?
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Jan 9, 2010
is there any possible way to hide currently running processes from an user? This means I do not want him to know about what programs/processes does any other user but him run. In short words if that user runs 'ps -aux' he should get only his processes.
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Feb 22, 2010
I'm looking for a command that will give me a list of users (unique, dont name my user account 60 times) that are running processes on a system.
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Apr 1, 2010
When I open top and look at the running processes, there a bunch that are -5 in the nice and 0 with everything else.
[Code]....
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Jul 17, 2010
Ran the most recent updates several days ago and now System Monitor show my CPU at %100 constantly although it shows no processes running.
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Dec 19, 2010
First time Ubuntu user (used to be on debian earlier).
I like that everything works out of the box (had to install codecs etc, but thats standard); but I dont like that there are 260 processes running. Is there a utility to stop unnecessary processes from running in Ubuntu 10.10? I used rcconf but there did not seem to be a whole lot of startup processes that were enabled. Yet somehow I am running 260 processes now.
Even if I log into fluxbox, I get 200+ processes running.
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Nov 3, 2010
I list all the instances of a running process my doing:ps -ef | grep myprogramThis lists all them.how can I simply output a count of how many are running?
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Dec 5, 2010
I have written this script to monitor Apache2:
Code:
#!/bin/bash
#count lines that show apache2 but not the fgrep itself
let i=`ps aux | fgrep apache2 | fgrep -v grep | wc -l`
if [ "$i" -gt 0 ]
then
#log something
[Code]...
It has all been working fine until recently when Apache is becoming unresponsive. I manually ran ps to check and there were 3 processes. However when I ran apache2ctl graceful I got the message 'httpd not running, trying to start' Is there a better way to check if a daemon is up?
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Mar 3, 2011
my computer is often very slow, to the point of stalling. I tty'd in and when I ran ps -ef I noticed about 10 /usr/sbin/apache2 -k start I dont even want 1 apache running. Any suggestions why these are running, or how to stop it? Well, I can stop it with a sudo killall, but how can I make sure it doesnt happen again?
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Apr 5, 2011
Does Debian 6 "Squeeze" automatically run boot processes in parallel if not how do I
configure it to do so. Here is the quote from my /etc/init.d/rc :
# Specify method used to enable concurrent init.d scripts.
# Valid options are 'none' and 'makefile'. Obsolete options
[code]...
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Apr 15, 2010
How can I find the PID for all processes running for a particular port?
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Jan 30, 2011
My University gives us access to a Linux server, named stud1.
Code:
me@stud1:~$ uname -a
Linux stud1.some.univ.ac 2.6.9-89.31.1.ELsmp #1 SMP Mon Oct 4 21:41:59 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
Apparently I was logged in, and never logged out sometime:
Code:
me@stud1:~$ who
<snip>
me pts/37 Jan 30 13:27 (6.6.66.66)
<snip>
me pts/58 Dec 30 19:13
but when trying to find out why I'm still logged in, I can't find it:
Code:
me@stud1:~$ ps faux |grep me
root 30030 0.0 0.0 51128 4360 ? Ss 13:27 0:00 \_ sshd: me [priv]
me 30033 0.0 0.0 51132 2336 ? S 13:27 0:00 \_ sshd: me@pts/37
[code]....
how can I logout this unused session?
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Aug 18, 2009
I have p1,p2,p3,p4 some processes created by me in C. p1, p2, p3 are started individually from several consoles. And I want process p4 to terminates processes p1, p2, p3 if they are running. Which is the easiest way to accomplish that? put all processes in the same process group and send from p4 a kill signal to the group. But I couldn't do that because I cannot call successfully setpgid(getpid(), 15000) from p1-p4. It's there some way to put them in the same group? the processes don't have a child-parent relationship, they are launched manually from consoles.
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Oct 18, 2010
When I open a terminal and start the 'top' command to view the running processes, in the summary view I get 4 users. I guess that in addition to my account the root runs in the background but who are the other 2??
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Jul 19, 2010
I am trying to get a list of running processes using audio (using gstreamer), just like in gnome-volume-control, under applications, but have so far been unsuccessful in finding anything in either the gtk or gstreamer library, anyone out there who can point me in the right direction?
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Nov 9, 2010
The command used to view processes running on the Linux machine is?
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May 20, 2010
how to write a shell script the searches for processes running on my system. I really don't know where to start. can anyone give me a hand and explain how the script works?
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Dec 30, 2010
I've a Linux box with few users (with shell). I would like to prevent normal users see all the processes running on the box. How can I implement this?
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Sep 10, 2010
While executing df command on an AIX Console, by mistake I ended the line with an ampersand:
[Code]...
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Feb 5, 2011
how to list the currently running processes via code a shell script. FYI i now about the top method in the terminal but i need a way to have it via a shell script.
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Nov 2, 2010
Are there any tools to view/edit user space memory of running processes on Linux?
It would be a great learning tool.
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