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Issue description

In the below line: === Another convenient utility is pmcollectl. This utility is a Python port of a popular open source storage statistics application called collectl. [user@host ~]$ pmcollectl -c 5 === This utility is no more supported in latest RHEL 8 versions. Instead of giving example of this, we could update about actual way to use pcp collectl with pmrep along with its limitation of what all is available with pmrep for collectl ~~~ Version: # rpm -q pcp-system-tools pcp-system-tools-5.3.7-17.el8_8.x86_64 ----------------------- PCP-COLLECTL The pcp-collectl utility has been superceded by pmrep(1) from PCP v5 onward. The equivalent of pcp-collectl subsystem reporting is achieved as follows: pmrep :collectl-sc Processor subsystem view. pmrep :collectl-sm Memory subsystem view. pmrep :collectl-sd Aggregate disks view. pmrep :collectl-sD Per-disk-device view. pmrep :collectl-dm-sD Device mapper view. pmrep :collectl-sn Network subsystem view.

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