devops basic to advance full details devops

introduction to devops

1. Title : DevOps Your Name/Team : Vaishnavi Holkar Pratibha More Sakshi Waghule Rutuja Mate Date :28 /01/2025

2. Devops Devops : DevOps is a methodology that combines software development and IT operations to improve the software development lifecycle

3. What is DevOps ? Definition: DevOps is a set of practices that combines software development ( Dev ) and IT operations (Ops). It aims to shorten the systems development life cycle and provide continuous delivery with high software quality.   Key Principles: Automation: Automate repetitive tasks (builds, deployments, testing) using tools like Jenkins, Ansible , Puppet. Continuous Integration/Continuous Delivery (CI/CD): Frequent code integration and automated deployments to production. Focuses on automation, collaboration, and communication between development and operations teams. Collaboration: Foster close communication and shared responsibility between development and operations teams .

4. . Infrastructure as Code: Manage and provision infrastructure (servers, networks) through code (e.g., Terraform , CloudFormation ). Monitoring and Logging: Continuously monitor applications and infrastructure for performance, errors, and security.

5. DevOps Lifecycle Plan: Define project goals, requirements, and timelines. Choose appropriate tools and technologies. Determine deployment strategies (e.g., blue/green, canary). Code: Develop and write code adhering to best practices (version control, code reviews). Utilize agile methodologies (Scrum, Kanban ). Build: Automate the build process (compiling, packaging, creating artifacts ). Implement continuous integration (CI) to catch and fix errors early. Test: Conduct thorough testing at various stages (unit, integration, system, acceptance). Implement automated testing frameworks. Release: Deploy applications to production environments. Utilize continuous delivery (CD) for faster and more frequent releases .

6. Deploy: Automate deployment processes using tools like Ansible , Puppet, Chef. Ensure smooth and reliable deployments. Operate: Monitor application performance and infrastructure health. Troubleshoot and resolve issues promptly. Monitor: Collect and analyze logs and metrics. Identify and address performance bottlenecks. Gain insights for continuous improvement.

7. Basic Linux Commands Essential Commands: ls : List files and directories. cd : Change directory. pwd : Print working directory. mkdir : Create a directory. rmdir : Remove an empty directory. rm : Remove files. cp : Copy files. mv : Move or rename files. File System Commands: cat : Display the contents of a file. head : Display the first few lines of a file. tail : Display the last few lines of a file.   grep : Search for patterns within files.

8. User Management : su : Switch user. sudo : Execute commands as root. useradd : Create a new user. userdel : Delete a user. Process Management : ps : Display a list of running processes. kill : Terminate a process.

9. ` G rep ` Command in Linux : • A Deep Dive into Searching and Filtering Text Introduction to ` grep ` • ` grep `: Stands for 'Global Regular Expression Print .‘ • A powerful command to search for patterns in text files or outputs . • Syntax: ` grep [options] pattern [file...]`

10. Why Use ` grep `? • Search large files efficiently. • Filter command output. • Find specific information within logs and configurations.

11. Search in Multiple Files : • Search across multiple files: • grep "pattern" file1.txt file2.txt • Example: • grep "status" *.log