deVops pathshala Blog – Notes for Me & You

  Subscribe YouTube Channel @devops-pathshal a   1. What is Docker ? Ans:- Docker is a platform that allows you to package an application and all its dependencies into lightweight portable containers. 2. What are Containers ? Ans:- Containers are lightweight, isolated environment that package an application along with all dependencies so it run consistently on any system. 3. What is the difference between a container and a Virtual Machine ? Ans:- Containers are lightweight because they share the host operating system, while virtual machine are heavy because they run their own full operating system. Containers start very quickly, use fewer resources and are ideal for microservices. Virtual machines provide stronger isolation but require more RAM and CPU since each VM containers a full OS. So overall, containers are fast and efficient, whereas VMs are heavier but more isolated. 4. What are docker engine ? Ans:- Docker Engine is the core component of  Docker that runs and ma...

  • Storage Type   1. Floppy disk   2. CD/DVD  3. Pendrive/Memory card  4. Harddisk--> IDE,SATA,SSD,Nvme  Disk Partitioning → Disk partitioning allows system administrators a hard drive into multiple logical stroge units, referred to as a partitions.   → The process to dividing a disk into logical areas that can be worked with separately id called partitioning.  ❖ Types of Partition Scheme   1. MBR  2. GPT LVM:- Logical Volume Manager   LVM (Logical Volume Manager) is a Linux feature that allows flexible disk management. It lets you combine multiple disks into a storage pool, create logical partitions, and resize them dynamically without downtime   • PV:- Physical Volume In LVM (Logical Volume Manager), a Physical Volume (PV) is simply a storage device (like a hard disk, SSD, or a partition) that is prepared for use in LVM. • Before using a disk in LVM, you must convert it into a PV using the pv...

   Are you confused about where to start your DevOps journey? This post will help you understand the complete DevOps learning path step by step. The roadmap image below shows all the important tools and concepts you should learn to become a successful DevOps Engineer in 2025 and beyond. ✅ What this roadmap covers: The correct learning order – from basics to advanced Most essential tools every DevOps engineer must know Cloud, container, automation, and CI/CD topics Real-world skills needed for job readiness 📌 Key Learning Stages: Linux Fundamentals – The base of every DevOps journey Version Control – Git & GitHub Scripting – Shell scripting and Python basics Containers – Docker and containerization Orchestration – Kubernetes fundamentals Cloud – AWS (or any major cloud provider) Configuration Management – Ansible Infrastructure as Code – Terraform CI/CD – Jenkins, GitHub Actions Monitoring & Logging – Prometheus, Grafana, ELK stack 🎯 How to use this roadmap: Don’t try...

                                                   LINUX BASIC COMMANDS                                           1. whoami - Display the current logged-in user.                    whoami - Shows username.                    Example: whoami  2. pwd - Print the current directory path.                pwd - Outputs the current directory.  Example: pwd  3. . ls - Lists directory contents.             ls - Basic list.             ls -l - List with details.             Example: ls -la Directory  4. . cd - Chan...