Quickly view a list of active services

vharishankar · 03-30-2005, 05:32 AM

Is there any program or command line tool that will let me view a list of running services (daemons) on Linux?

slakmagik · 03-30-2005, 05:44 AM

vharishankar · 03-30-2005, 06:39 AM

ps is not showing any background services/processes that I know are running like iptables

Actually it is showing the same result as KDE System Guard. I wanted a list of background processes like the ones that show up on bootup like iptables, timidity++, alsa and so on.

Thanks anyway.

slakmagik · 03-30-2005, 06:48 AM

If something's running, AFAIK, it's got to have a PID and show up - are you using 'ps ax'?

Code:

...
   69 ?        Ss     0:00 /usr/sbin/syslogd
   72 ?        Ss     0:00 /usr/sbin/klogd -c 3 -x
  120 ?        S<s    0:00 udevd
  170 ?        S      0:00 [khubd]
 2611 ?        S      0:00 /usr/sbin/crond -l10
...

alienDog · 03-30-2005, 07:05 AM

Iptables is not running as a service. It's just a program to manage kernel's packet filtering capabilities. Kernel does the actual job.

vharishankar · 03-30-2005, 07:40 AM

What I wanted to know was that is there any tool like "redhat-services-config" in Debian and Gentoo which will show me which processes are active and which are not.

This information was available in webmin, but since I don't have webmin installed in Gentoo, I wanted to know a simple command line which would give me this information.

Sorry if I haven't been clear. Just that my terminology is not very illuminating. I hope you can understand what I mean.

Maybe "which process is running in which runlevel" would be a better description?

anand_kt · 03-30-2005, 09:20 AM

partly,
chkconfig --list
service --status-all

vharishankar · 03-30-2005, 09:56 AM

Quote:

Originally posted by anand_kt
partly,
chkconfig --list
service --status-all

I think those commands are RedHat/Fedora specific.

oneandoneis2 · 03-30-2005, 10:12 AM

I like

Code:

ps aux -H

which shows all active processes, and groups them by what called what - e.g. if you started X from a terminal and then called firefox from an xterm, it would show something like:

Code:

Terminal 1
   xorg
      gnome
         xterm
            firefox

Does that help?

vharishankar · 03-30-2005, 10:41 AM

Thanks oneandoneis2. That helps, but the info is a bit difficult to sift through.

Is there command to view them sorted by runlevel?

oneandoneis2 · 03-30-2005, 10:46 AM

What do u mean by runlevel?

I understand "runlevel" as the thing you define on bootup that determines what services start up during the boot process. . .

If by 'active services' you mean ones that are using the CPU, then you could use 'top' sorted by CPU usage. . .

vharishankar · 03-30-2005, 11:00 AM

I mean viewing which services are initialized at which runlevel. Is there any way to view and edit this information? Without using any distro-specific GUI tools? I am using Debian and Gentoo.

Also which of those are currently running.

alienDog · 03-30-2005, 11:21 AM

How about:

Code:

ls /etc/rc.d/rc.[runlevel] | grep ^S

vharishankar · 03-30-2005, 11:24 AM

In Debian the directory structure is a little different

/etc/rc0.d/
/etc/rc1.d/
...

and so on.

In any case, thanks for the information!

comprookie2000 · 03-30-2005, 07:07 PM

Try rc-update show,that will show what was started at boot at the default run level ect.