Firewalls are an integral component of every contemporary computer system, safeguarding the network and protecting the system from illegal access. We'll take a deep dive into the realm of Linux firewalls and learn how to configure one in this post. Before we involve into the technical details of establishing a firewall in Linux, let us clarify what a firewall is and why it is so important! A firewall is a network security device that monitors and restricts network traffic based on predefined security rules. A firewall's principal function is to block unauthorised access to a computer system or network while ... Read More

Describe Docker Docker is an open-source container management platform that is free to use and offers a wide range of tools and utilities for developing, testing, and deploying applications. You can build packed, isolated, and platform-independent containers that include all libraries and dependencies. This will make it simple for you to create and distribute applications. The Docker Platform The Docker platform provides tools and utilities for packaging, building, and running software applications in isolated and containerized environments known as containers. The Docker architecture's security and isolation enable you to do so. Docker includes numerous tools for managing container lifecycles. ... Read More

These two are mostly used bibliographic databases. There are a few key differences between OVID and PubMed. For one, OVID offers a much more intuitive interface than PubMed. This is because OVID is designed specifically for clinical researchers, while PubMed is designed for general biomedical researchers. Another key difference is that OVID offers better search filters than PubMed. This is because OVID includes filters for things like publication type, date range, and subject area. This means that you can really narrow down your search results to find exactly what you're looking for. Finally, OVID also offers a "My Bibliography" feature, ... Read More

Introduction Docker images are the building blocks of containerized applications. They are lightweight, portable and can be easily shared between different machines. In this article, we'll take a look at how to save all Docker images on one machine and transfer them to another machine. Method 1: Using docker save and docker load One way to save and transfer Docker images is by using the docker save and docker load commands. The docker save command allows you to save one or more images to a tar archive, which can then be transferred to another machine. The docker load command allows ... Read More

Introduction Flattening a Docker image is the process of creating a new, single-layer image from an existing multi-layer image. Flattening an image can be useful in a variety of scenarios, such as reducing the size of the image, improving the performance of the image, or simplifying the image for easier distribution. A flattened Docker image is an image that consists of a single layer, containing all the files and metadata required for the image to function. This is in contrast to a multi-layer image, which consists of multiple layers stacked on top of each other, each containing a subset of ... Read More

Introduction Executing a script upon container termination is the process of running a script or command when a Docker container is stopped or removed. This can be useful in a variety of scenarios, such as cleaning up resources, logging information, or triggering other actions. Container termination refers to the process of stopping or removing a Docker container. This can be done manually using the docker stop or docker rm commands, or automatically through the use of container orchestration tools or container lifecycle management features. Example 1: ONBUILD To execute a script upon container termination using the ONBUILD Dockerfile command, follow ... Read More

Introduction When building a Docker image, one of the most time-consuming and resource-intensive steps is running the "RUN npm install" instruction. This instruction installs all the dependencies listed in your package.json file. Caching the results of this instruction can greatly improve the build time of your image. In this article, we will explore different strategies for caching the "RUN npm install" instruction in a Dockerfile. Caching Strategies There are several strategies for caching the "RUN npm install" instruction in a Dockerfile. These include − Using a .dockerignore file − This strategy involves excluding the node_modules directory from being copied ... Read More

Introduction Docker containers are a popular way to package and deploy applications. One of the key features of containerization is the ability to isolate resources and limit their usage. In terms of CPU, it is important to know how many CPUs a container can use, as this can greatly impact the performance of the application running inside the container. This article will cover the concepts of CPU resource allocation in Docker, determining the number of CPU available to a container, configuring CPU resources for a container, and advanced techniques for managing CPU resources. Understanding these concepts will help ensure that ... Read More

Introduction Using variables in a Dockerfile CMD can greatly improve the flexibility and maintainability of container configuration. Hardcoding values in a CMD instruction can make it difficult to update or modify the container's configuration in the future. Using variables allows for more dynamic and reusable configurations. Prerequisites The prerequisites for using variables inside a Dockerfile CMD depend on the method you choose to use − Using shell expansion − No specific prerequisites are required. Using the ENV instruction − No specific prerequisites are required. Using the ARG instruction − No specific prerequisites are required. Passing variable at runtime − ... Read More

Introduction When working with Docker on Windows, it is possible to use network drives as volumes. This allows you to store data on a network drive and access it from within a Docker container. This can be useful in situations where you need to share data between containers, or between the host and the container. With network drive as volume, you can easily store, manage and backup your data in a centralized location and use it with multiple Docker containers. In this article, we will explore the process of adding network drives as volumes in Docker on Windows, and the ... Read More