ModSecurity is a free, open-source, and most popular web application firewall (WAF) that protects your web application against a wide range of Layer 7 attacks. In this tutorial, I will show you how to install ModSecurity 3 with Apache inside a Docker c…
In this article, I will show you aws-cli commands to manage Cloudwatch from the terminal. This guide will help you get started with using aws-cli for creating, managing Cloudwatch alarms.
In this article, I will give you a short explanation of what the value null or the null device means in the computing world.
ReactOS is a relatively new open source operating system that resembles the looks of Windows NT and aims to offer similar levels of functionality and application compatibility. Featuring a wine-based user mode, this system doesn’t use any of the Unix a…
The lsof command in Linux displays in its output information about files that are opened by processes. In this article, we will discuss the tool using 15 easy-to-understand examples.
The Z Shell or zsh is an interactive UNIX shell and powerful command-line interpreter for scripting language including shell scripting. The Z shell has become one of the most popular shells for Linux operating system. It’s rich in features and easy to …
In this article, I will show you the commands to create an SNS Topic, Subscription, confirm, and delete the Subscription on Linux shell using aws-cli.
Managing a VPC and other resources like Subnet, Route Table, Internet Gateway from the terminal using aws-cli can be a bit confusing if you are not good at VPC. In this article, we will create a VPC with 2 Subnets, Route Table, and Internet Gateway, th…
Ingress is a Kubernetes object that manages external access to the services in the Kubernetes Cluster. In this article, we will see the installation of the Nginx Ingress Controller using Helm on the Kubernetes Cluster set up using Kops.
You can perform operations on SQS like list, create, delete Queues and send messages, receive messages from your terminal using aws-cli. In this article, we will see the commands to perform these kinds of operations.
When working in an office, you naturally need a sharing operating system for each and every computer to allow for the quickest installation of files. While many people are currently trending towards Windows, which has marketed itself as the premier sui…
Cert-Manager is a controller used for certificate management. In this article, we will set up a Cert-Manager with Let’s Encrypt issuer. We will secure our sample application using the TLS certificates and have HTTPS in our Hostname to access the applic…
There are various invocation metrics, performance metrics, and concurrency metrics available for Lambda functions in Cloudwatch to monitor.In this article, we will create an alarm for the "Invocations" metric which will send a notification to…
Zenity is an open-source application for displaying simple GUI in shell scripts. It makes scripts more user-friendly by displaying GTK+ dialogs. In this article, we will show you how to use Zenity to display GUI dialogs in Bash scripts.
This guide will show you how to get started with managing your AWS virtual machine instances from the Linux command line using aws-cli.
This tutorial shows you how to easily set up a web, email and DNS server with ISPConfig 3 using the ISPConfig auto-installation script.
In this article, we will create an SNS topic with an access policy that will allow our own account to perform all SNS actions on the topic.
The website loading speed or response time is very important for any webmaster because it will impact search engine rankings and user experience. In this tutorial, we will show you how to test website loading speed using the curl command in Linux.
To monitor DynamoDB tables, metric data is sent to CloudWatch automatically. In this article, we will create an alarm for a DynamoDB table to monitor "ConsumedWriteCapacityUnits" and send a notification to the SNS topic.
Creating a user and adding a public key to it can be very tedious. In this article, we will see how this process can be automated using a shell script which can help us avoid human errors that can arise if we do the task manually.