networking

System networking managed by networkd deamon on Ubuntu 20.04 Focal Fossa

How to restart network on Ubuntu 20.04 LTS Focal Fossa

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There exist various ways of restarting network on Ubuntu 20.04. Possibly the simplest way would be to restart network from GUI such as GNOME. Other ways would include the use of the command line and commands netplan and ip. Finally, the NetworkManager command line tool nmcli or the System V init scripts can be used to successfully restart network on Ubuntu 20.04 Focal Fossa.

In this tutorial the reader will be provided with comprehensive information on:

  • How to restart network from GUI
  • How to restart network using the netplan command
  • How to restart network using the ip command
  • How to restart network using System V init scripts
  • How to restart network by using the NetworkManager command line tool nmcli

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How to setup Nginx Reverse Proxy

How to setup Nginx Reverse Proxy

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In this guide, you will learn how to setup an Nginx reverse proxy with step by step instructions. We will also explain how a reverse proxy server works and what its advantages are. In addition, we also go over various configuration options that Linux administrators commonly employ on their reverse proxy servers.

In this tutorial you will learn:

  • How does a reverse proxy work
  • What are the benefits of a reverse proxy
  • How to setup Nginx reverse proxy
  • How to pass headers
  • How to configure load balancing
  • How to test the Nginx configuration

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How to analyze and interpret Apache Log

How to analyze and interpret Apache Webserver Log

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Apache web servers can generate a lot of logs. These logs contain information such as the HTTP requests that Apache has handled and responded to, and other activities that are specific to Apache. Analyzing the logs is an important part of administering Apache and ensuring that it runs as expected.

In this guide, we’ll go over the different logging options present in Apache and how to interpret this log data. You’ll learn how to analyze the logs that Apache produces and how to configure the logging settings to give you the most relevant data about what Apache is doing.

In this tutorial you will learn:

  • Configure and understand Apache webserver logging
  • What are Apache log levels
  • How to interpret Apache log formatting and its meaning
  • What are the most common Apache log configuration files
  • How to extend logging configuration to include forensic data

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How to benchmark Webserver with Apache Bench

How to benchmark Webserver with Apache Bench

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Apache Bench is a tool used to measure the performance of a web server. Despite having “Apache” in its name, it can actually be used to test any type of web server. In this tutorial, we’ll go over the steps to use Apache Bench and how to interpret its report about a web server’s performance.

Apache Bench works by sending varying amounts of HTTP requests to the web server and recording the response times. It can tell you how much congestion the server can handle before it gets overwhelmed and performance diminishes.

In this tutorial you will learn:

  • How to install Apache Bench
  • How to use Apache Bench
  • How to interpret Apache Bench Results

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Configure static IP address on Fedora 31

How to configure static IP address on Fedora 31

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There ar multiple ways on how to set your Fedora 31 system with a static IP address. Using the nmcli is perhaps the simplest regardless of GUI is currently your system configured with.

In this tutorial you will learn:

  • How to set static IP address
  • How to set DNS server IP address
  • How to Gateway IP address
  • How to apply / restart network

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bond0_status

How to configure network interface bonding on RHEL 8 / CentOS 8 Linux

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Network interface bonding consists in the aggregation of two or more physical network interfaces, called slaves, under one logical interface called master or bond interface. Depending on the bonding mode, such setup can be useful to achieve fault tolerance and/or load balancing. In this tutorial we will learn what the available bonding modes are and how to create a network bonding on RHEL 8 / CentOS 8.

In this tutorial you will learn:

  • What is network interface bonding
  • How to configure network interface bonding on RHEL 8 / CentOS 8
  • What are the different bonding modes

bond0_status

The Bond status as seen by the Linux kernel

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Telnet command on Red Hat Enterprise Linux 8.

How to install telnet command in RHEL 8 / CentOS 8

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Telnet command is a valuable tool for any network or system administrator. It allows for troubleshooting and manipulation of various services.

The telnet package is not installed by default on RHEL 8 / CentOS 8 server but can be easily installed by using the dnf command.

In this tutorial you will learn:

  • How to install Telnet on RHEL 8 / CentOS 8.
  • How to use telnet command to connect to a specific port.

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Nmap command on RHEL 8 Linux Server/Workstation

Install nmap on RHEL 8 / CentOS 8

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The nmap command is an invaluable tool for any system or network administrator. This command is not available on RHEL 8 / CentOS 8 default installation. However, it can be installed with a single dnf command.

In this tutorial you will learn:

  • How to install Nmap command on RHEL 8 / CentOS 8.
  • How to to check Nmap version on RHEL 8 / CentOS 8.

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