Okerrupdate is client-side library and utilities to work with okerr monitoring. You need it if you want to monitor your server ‘from inside’ (e.g. watch free disk space, load average, CPU temperature and number of customers/purchases in web application database).
Install as python package (recommended way for all users):
pip3 install okerrupdate
Or clone source code from okerrupdate repository (for developers):
git clone https://github.com/yaroslaff/okerrupdate.git
Okerrmod is utility to work with okerr check module
Check module (or simple check or module) is small program that checks one parameter of system, such as CPU temperature, free space on partition, is apache running or not and similar thing.