Published in Level Up Coding·Mar 19Regex DemystifiedLearn the dark arts of understanding regular expressions — Regex (also called Regular Expression or RegExp) is a sequence of characters that can be used to find or match patterns in text. Regexes are made up of special characters (meta-characters) that allow to define complex patterns in a terse and concise manner. Regexes has a broad range of real…Programming9 min readProgramming9 min read
Published in Level Up Coding·Jan 21Linux 101: Filesystem StructureAn introduction to the directories that makeup the Linux Filesystem — All devices generate data in some shape or form. The generated can have different structures, sizes and even different level of sensitivity. To store data permanently computers make use of nonvolatile storage devices like Hard Disk Drives (HDD), Solid State Drives (SSD) and USB Sticks. …Linux11 min readLinux11 min read
Published in Level Up Coding·Jan 14Docker 101: Part 5 - VolumesDocker containers are used to run applications and services in an isolated environment. Any data that is generated by the container only stored while the container is running i.e. data generated by the containers is ephemeral in nature. This becomes can issue if we want to persist information even after…DevOps10 min readDevOps10 min read
Published in Level Up Coding·Jan 7Docker 101: Part 4 - NetworksIn this post we will be looking at Docker Networks with its types and how to use them. The reader is expected to have a high level understanding of Docker and Computer Networks before going through this post. Docker network helps to facilitate communication between containers and other non-containerized services…DevOps11 min readDevOps11 min read
Published in Level Up Coding·Aug 13, 2022Docker 101: Part 3 - ContainersSo far, we have looked at the basics related to containers and the various Docker commands for managing Images. In this article, we are going a dive deeper and look at Containers (finally) and their associated commands. Container Lifecycle There are 5 states in which a container can exist during its entire…Docker9 min readDocker9 min read
Published in Level Up Coding·Jul 31, 2022Docker 101: Part 2 - ImagesIn the previous article, we looked at some of the basic concepts related to containers and how containers differ from VMs. In this article, we will look at Container Registries, Docker Images, and the main commands related to images. To follow along, Docker Engine needs to be installed on our…Docker6 min readDocker6 min read
Published in Level Up Coding·Jul 9, 2022Docker 101: Part 1 - BasicsIn this post we will be looking at some basics concepts that are important in understanding Docker and have an discussion along the way on how Virtual Machines differ from Containers. What does to mean to Containerize software and What is a Container ? The process of packaging software along with all of its components is called as containerization. Components can be anything…Docker6 min readDocker6 min read
Published in Level Up Coding·Jun 18, 2022Linux 101: File PermissionsFile permissions is an important concept to understand for anyone working with Linux. Permissions are a set of attributes (along with ownership) which is used to control the level of access the users and system processes have on files. …Linux7 min readLinux7 min read
Published in Level Up Coding·May 21, 2022Python if __name__ = ‘__main__’ explainedBefore we can dive into the question at hand lets look at a few examples to understand what Python does when we run code. When a Python script is executed the Python interpreter behind the scenes sets some global environment variables and then executes all the code that is present…Python4 min readPython4 min read
Apr 24, 2021TryHackMe - Bounty HackerYou talked a big game about being the most elite hacker in the solar system. Prove it and claim your right to the status of Elite Bounty Hacker! — 1. Deploy the machine. No answer required The first task that is performed when we are given an target to exploit is to find the services that are running on the target. To find services running on the machine I will be using “RustScan” which is an port scanner similar…Tryhackme5 min readTryhackme5 min read
