17 Nmap Commands with Examples for Linux Network & System Administrators

May 14, 2019

Nmap stands for Network Mapper. It is an open source tool for network exploration and security auditing. With NMAP, server administrators can easily reveal hosts and services on a computer, scan for security issues and check for open ports. The NMAP command line tool can audit and discover local and remote open ports, as well as network information and hosts. Here are some of the most useful Nmap commands with examples.

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Best Tools to Monitor Network Bandwidth on a Linux Server

May 4, 2019

There are many different tools for monitoring network traffic on a Linux server. Each option has its strengths and weaknesses. Most of the command-line utilities are designed to be lightweight, so they do not inflate bandwidth reports. Some are designed to present a basic overview, while others provide detailed data. This guide offers the best Linux network monitoring tools.

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Linux Ping Command Tutorial with Examples

April 18, 2019

Most Linux users are familiar with the ping command and know how to use it in its basic form. However, there are many additional ping options and variations. In this guide, we will walk you through some of the most useful ping commands with examples.

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How to Change Hostname on Ubuntu 18.04

February 27, 2019

Learn The Simple Way How to Change Hostname on Ubuntu 18.04. Multiple options, including using Linux command line tools.

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How to Scan & Find All Open Ports with Nmap

February 16, 2019

The Nmap hosted security tool can help you determine how well your firewall and security configuration is working. This guide will show you how to scan or check your Linux system for open ports using Nmap.

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What is a Domain Name System (DNS) & How Does it Work?

January 22, 2019

Domain Name System (DNS) first emerged in the early 1980s. It represents a system of interconnected servers that store registered domain names and Internet Protocol (IP) addresses. As the Internet grew, it became an unavoidable part of online interaction.

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How to Flush DNS Cache in macOS, Windows, & Linux

January 8, 2019

DNS cache can be corrupted for a number of different reasons, including network attacks or viruses. When that happens, IP address mapping becomes corrupted for certain popular websites. Learn to clear DNS cache on your system and resolve potential issues.

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How to Set up & Use NGINX as a Reverse Proxy

Nginx (pronounced “Engine X”) is a reverse proxy application. A standard proxy server works on behalf of clients, often by providing privacy or filtering content. A reverse proxy works on behalf of a server, intercepting traffic and routing it to a separate server.

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How to Edit Hosts File in Linux, Windows, or Mac

October 22, 2018

The hosts file in Windows, Mac, or Linux maps hostnames to IP addresses. This could be in an intranet, like a corporate office that has servers for users to access, or it could be domain names for servers on the internet.

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How to Set or Change a Hostname in CentOS 7

October 21, 2018

This technical guide is for users who already have a server running the CentOS 7 operating system on a network.

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