Hey guys,

I am going monitoring Linux process by snmpd.conf above the article. But, i have a doubt. i added a sensor, in my case 'process:1' process count -> 'actually its httpd'

• In this moment its stopped, so my sensor mak 0 in process count, ok. But its green. How to configure for when count ==0 sensor stay red?

tks a lot!

Hi,
in the overview of the affected sensor, please switch to the "Channels" tab. There please choose the correct channel and enable the limits for this channel. There you may set your lower error limits.
Best regards

this is not what was asked:

how can i monitor running processes on linux? the number of running processes, i.e. MIB 1.3.6.1.2.1.25.1.6.0

this is working on one host and not on another. both running same OS both using exactly the same snmpd.conf

@amirtal: May you please elaborate on the precise issue? What exactly is not working? Do you get any error messages?

When creating a sensor to monitor a Linux Process I select SNMP Library. I then select the Basic Linux Library (ucd-snmp-mib).oidlib library file. After selecting Basic Linux Library (ucd-snmp-mib).oidlib I do not get Category "Processes: 1" nor do I get anything with "Process Count" in the name list.

The only Categories that are available to select from are Memory, System Stats, and CPU Load.

I can monitor the system with other Linux SNMP Sensors.

I have modified snmpd.conf file with proc sshd as the last line in a very basic conf file.

snmpd.conf file

#ASM SNMPD Config
rocommunity public
syslocation "Alpharetta, GA"

proc sshd

What might I be missing when attempting to create a sensor to monitor a Linux Process? Are the Process Categories still available to chose from? Is the right Linux MIB File installed on the PRTG Server?

@jessev: Could you please run

ps -e |grep sshd

What results do you get? EDIT: Are you able to add other SNMP Sensors (e.g. Uptime)?

Hi I have the same problem! when monitor a process and it not running the sensor stay Green and not send notification !

please update us

@chikosan: The sensor above by default reads a value. It does not 'know' if this value is good or bad. So, to get a notification, please set a lower warning limit for the channel value in the Sensor Channel Settings of the Processes Count. The sensor should then go to an error state when the number drops to 0.

After following this article I had the same issue. I went to the sensor channel and in the lower error limit I entered 0 but the sensor will still show OK and stay green although the service on the box was stopped. What I did for it to work is instead of entering 0 in the lower error limit I entered .1 that seemed to fix the issue. PRTG is now showing error when the service is stopped and Green when it is started. Hopes this helps.

very useful article. thanks

It´s possible to monitor more then twelve processes? In the SNMP Lib there are only twelve process sensor, but I´ve thriteen processes on my linux system.

@Marc Boettcher: This seems to be a limitation of NET-SNMP itself. So monitoring 13 processes is not possible then. Sorry.

will this handle processes with spaces in them? like "bash /bin/something"?

If so, does it require quotes around it?

@chlsmith thank you for your inquiry. I'm unable to confirm that, the net-snmp documentation page does not mention/specify that:

• snmpd.conf Process Monitoring
• snmpd.examples Process Monitoring

I encourage you to give it a try.

Best Regards,
Luciano Lingnau [Paessler Support]

Это мониторинг процессов, а необходимо именно именно служб. Как это сделать в версии 17.3?

This is the monitoring of processes, and it is the services that are needed. How to do this in version 17.3?

Hi there,

The above guide still applies to the most recent version and your version as well.

Best regards.

Process and service are different things.

Example: ps -e | grep postfix

Returns nothing

Example: service postfix status

Returns

• postfix is running

Hi there,

Is it possible that the postfix has a different process name? Could you try the following command instead?

ps | grep [p]ostfix

Best regards.

# ps | grep p
58568 pts/3    00:00:00 sudo
58641 pts/3    00:00:00 su
58642 pts/3    00:00:00 bash
58755 pts/3    00:00:00 ps
58756 pts/3    00:00:00 grep

Nothing like this

Hi there,

As what user are you logged in? Is it possible that the postfix service runs a different user and you are not able to get the "ps"-output of other user accounts?

Best regards.

Full root rights

Hi there,

Might be worth to check what process listens on port 25:

 # sudo lsof -i :25   
 COMMAND  PID USER   FD   TYPE DEVICE SIZE NODE NAME
 master  5664 root   12u  IPv4  13732       TCP *:smtp (LISTEN)

Afterwards check the returned PID like this:

 # ps p 5664
 PID TTY      STAT   TIME COMMAND
 5664 ?        Ss     0:12 /usr/lib/postfix/master

Best regards.

Example, I need to monitor exactly whether the services are running: amavis, clamav, mysql, postfix

Hi there,

This is clear. But the above procedure only applies to processes. So a process can have an entirely different name from the actual service.

Best regards.

Please specify the link where the service monitoring method is specified.

Hi there,

There is no guide or documented way to do this. The only way is documented above, by monitoring the process behind the service.

Best regards.

Wrong, here's the link https://kb.paessler.com/en/topic/39513-is-there-a-shell-script-example-for-the-prtg-ssh-script-sensor#reply-291978

Hi,

Sure, using a custom sensor via SSH is an option - but this is not an already in PRTG implemented option. If the script above helps you, great! :)

Best regards.