Saurabh Khan - GravityDevOps

Essential Linux Commands

Linux commands are essential for navigating and managing files in a Linux-based system. This tutorial covers eight fundamental Linux commands: ls (List directory contents) cd (Change directory) pwd (Print working…

Saurabh Khan March 1, 2025

Linux

Understanding the Linux Boot Process: A Step-by-Step Guide

The Linux boot process is a sequence of events that occur from the moment a system is powered on until the user gets a fully functional operating system. It involves…

Saurabh Khan March 1, 2025

DOCKER

Managing Secrets in Docker: A Comprehensive Guide

In modern containerized environments, managing secrets securely is critical. Secrets, such as API keys, passwords, TLS certificates, and database credentials, must be protected to prevent unauthorized access. Docker provides multiple…

Saurabh Khan March 1, 2025

Linux

NtCreateFile (\Device\VBoxDrvStub) failed: 0xc0000034STATUS_OBJECT_NAME_NOT_FOUND (0 retries) (rc=-101)

NtCreateFile (\Device\VBoxDrvStub) failed: 0xc0000034STATUS_OBJECT_NAME_NOT_FOUND (0 retries) (rc=-101)Make sure the kernel module has been loaded successfully.where: supR3HardenedWinReSpawn what: 3 VERR_OPEN_FAILED (-101) – File/Device open failed. Driver is probably stuck stopping/starting. Try…

Saurabh Khan February 25, 2025

Uncategorized

Linux Boot Process: A Comprehensive Guide

Linux, like any other operating system, follows a structured boot process when a system is powered on. Understanding this process is crucial for system administrators, DevOps engineers, and Linux enthusiasts.…

Saurabh Khan February 25, 2025

Linux

Basic Linux Architecture: Kernel, Shell, Filesystem

Linux is an open-source operating system that powers a wide range of devices, from servers to embedded systems. Its architecture is designed for efficiency, security, and flexibility. Understanding the basic…

Saurabh Khan February 25, 2025

Linux

What is Linux? Why Use Linux? and Linux Distributions: Ubuntu, CentOS, RHEL, Debian

Introduction Linux is an open-source, Unix-like operating system that powers a vast majority of the world's servers, embedded systems, and even personal computers. It is widely known for its stability,…

Saurabh Khan February 25, 2025

DOCKER CONTAINERIZATION

Docker Security Scanning: A Comprehensive Guide

Introduction As organizations increasingly adopt Docker for containerized applications, security remains a top priority. One critical aspect of container security is Docker Security Scanning, which helps identify vulnerabilities in container…

Saurabh Khan February 23, 2025

DevOps

DevOps for Beginners: Full Lifecycle Explained with Real-World Examples

What is DevOps? DevOps is a culture, methodology, and set of practices that aim to bridge the gap between development (Dev) and operations (Ops) to enable faster, more reliable software…

Saurabh Khan February 22, 2025

DevOps

The Ultimate DevOps roadmap with Advanced Tools for 2025

DevOps Roadmap 2025 1. Fundamentals (Beginner Level) ✅ Linux & Shell Scripting Basic commands (ls, cp, mv, rm, grep, awk, sed, etc.) User management, permissions, process management Bash scripting &…

Saurabh Khan February 22, 2025