Good mornig, 

Please, you could support me with the issue "Not able to collect the data for CPU,Disk,Memory attribute using SSH mode". I added recently 14 linux monitors and all have the same message.

I had check the commands used to obtain the información and I can executed it without problem, there isn't exists slowness.

The command were these:

vmstat 1 3

free -b

/bin/df -Pm |awk '{print $(NF-3) " " $(NF-2) " " $(NF-1) " " $NF}'

according to reference: https://pitstop.manageengine.com/portal/en/community/topic/not-able-to-collect-the-data-for-memory-disk-attribute-using-ssh-mode

We check it the package of procps.rpm too and was updated to the most recent version. Is necessary a specific version?

I used too this reference: https://pitstop.manageengine.com/portal/en/kb/articles/while-trying-to-monitor-servers-i-get-a-no-data-available-error-for-cpu-core-utilization

And check it the execution of this command :

The messge still goes on. 

Thank you for your support. 

A.