To get started with Docker on Ubuntu, make sure you meet the prerequisites, then install
A firewall is a system that provides network security by filtering incoming and outgoing network traffic based on a set of user-defined rules. In general, the purpose of a firewall is to reduce or eliminate the occurrence of unwanted network communications while allowing all legitimate communication to flow freely. In most server infrastructures, firewalls provide an essential layer of security that, combined with other measures, prevent attackers from accessing your servers in malicious ways.
The English Oxford Dictionary describes a guru as somebody who is an influential teacher or popular expert.
How though do you become an expert in the field of Linux? This guide highlights the steps you should follow in your quest to become an authority on Linux.