Sorted:

How to install and configure an Nginx server on CentOS?

How to view system log files in CentOS?

What is the naming convention for Debian distributions?

How to update package in Debian system?

How to install and configure a MySQL database in CentOS?

Which package management tool does Debian use to manage software packages?

How can new software packages be installed in Debian?

“How to configure network settings in FreeBSD?”

What default desktop environment options are included in the Debian distribution?

What are the differences between FreeBSD and Linux?