Sorted:

What are the features of Icinga and how do you use it?

How can nginx be deployed using Docker?

How to set up a Hadoop cluster on CentOS 7

How to start all Hadoop processes?

How to set up Nagios configuration in Apache?

How to resolve the issue when Zabbix graph monitoring doesn’t show any data?

What is the method for uploading files using the Hadoop command line interface?

How to change directory permissions using chmod in Linux?

What are the application scenarios of the MapReduce framework?

What are the main features of Nagios?