How to Set up FTP Server on Your Raspberry Pi


Raspberry Pi can be used as an affordable FTP server. Learn how to set up the server and test your connection after establishing it.

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How to Install Puppet on macOS


Puppet is an open-source administrative engine that lets you perform remote admin tasks in a network through a single master node. This tutorial will show you how to install Puppet Agent on macOS.

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RPKI Explained – Secure BGP Routing


RPKI makes BGP more secure and reliable. Learn about the flaws of BGP, what RPKI is and how it works.

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How To Set Up Raspberry Pi As A DNS Server


Learn how to improve your network speed by setting up a Raspberry Pi as a DNS server in this step-by-step guide.

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How To Use Telnet On Windows


The Telnet client is not the best cybersecurity practice, however it is very useful for port troubleshooting. Learn how to turn on the Telnet client feature and check for open ports on Windows.

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How to Install Puppet on Ubuntu 20.04


Puppet is an open-source solution that helps you perform administrative tasks remotely. This tutorial takes you step-by-step through the process of installing Puppet on Ubuntu 20.04.

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How to Ping Specific Port Number in Linux and Windows


This tutorial covers the use of several networking tools and utilities for pinging a specific port number. Even though the primary use of the ping command does not involve ports, it can be used in order to check if a port is open or not by trying to…

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How to Use the who Command in Linux with Examples


The who command belongs to the GNU coreutils package in Linux. Its main purpose is to provide system administrators with information about the users who are currently logged into the system. This tutorial provides examples for the use of the command…

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How to Fix SSH Failed Permission Denied (publickey,gssapi-keyex,gssapi-with-mic)


The Permission Denied (publickey,gssapi-keyex,gssapi-with-mic) error appears after a new package installation or the creation of new users on an SSH server. This tutorial shows you how to troubleshoot and fix this error.

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How To Use Linux SS Command


The ss (socket statistics) tool is used for displaying various network and socket statistics. It is a faster version of the neststat tool. This article gives an in-depth overview of how to use it with various examples.

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