Sorted:

How to view system log files in CentOS?

How to install and configure an Nginx server on CentOS?

What is the naming convention for Debian distributions?

How to install and configure a MySQL database in CentOS?

How to update package in Debian system?

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

How can new software packages be installed in Debian?

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

“How to configure network settings in FreeBSD?”

What are the differences between FreeBSD and Linux?