Commands for Reading a file in Linux


Command	Description
ls	Directory listing
cat filename	View file content
less	View file page by page Ex: less <filename> It will display a page. If we enter space we will get another page If we want to exit please click Q or q on your keyboard
page	Display file page by page (Ubuntu flavor)
more	Output the contents of the file Ex: more filename
head	Output the required number of lines from top to bottom in a file Ex: head -5 filename
tail	Output the required number of lines from bottom to top in a file Ex: tail -5 filename

Comments

A Complete CI/CD Pipeline

Complete CI/CD Pipeline Using GitHub, Jenkins, Maven, SonarQube, Nexus, and Docker A well-designed CI/CD pipeline plays a critical role in modern DevOps practices by automating software delivery, improving code quality, and reducing deployment risks. In this article, I will explain how I build an automated CI/CD pipeline using GitHub, Jenkins, Maven, SonarQube, Nexus Repository, Docker, and Docker Hub. Source Code Management with GitHub The CI/CD workflow begins with storing the application source code in GitHub. Developers regularly push code changes or create pull requests to collaborate on features and bug fixes. Whenever new code is pushed to the repository, GitHub triggers Jenkins automatically through a webhook. This integration helps start the CI/CD pipeline without manual intervention. Code Checkout Stage in Jenkins The first stage of the pipeline is the checkout process. Jenkins connects to the GitHub repository and pulls the latest version of the source code. ...

Terraform for AWS: Step-by-Step Infrastructure Automation That Actually Works

How I Use Terraform to Provision and Manage AWS Infrastructure Efficiently Infrastructure as Code (IaC) has become a critical part of modern cloud operations, and Terraform is one of the most popular tools for automating cloud infrastructure deployment. In this article, I'll share how I use Terraform to build and manage AWS resources such as Virtual Private Clouds (VPCs), EC2 instances, Application Load Balancers (ALBs), and Auto Scaling Groups. Building AWS Infrastructure with Terraform My infrastructure deployment process begins by defining all AWS resources as code. This approach ensures consistency, repeatability, and easier management across multiple environments. The first step is creating a secure network architecture using a VPC. Within the VPC, I configure public and private subnets, route tables, internet gateways, and other networking components required for application deployment. Once the networking layer is ready, I deploy EC2 instances inside private su...

Master Linux Administration for DevOps: Powerful Commands, Troubleshooting Tips & Best Practices

Linux administration is one of the most important skills for anyone working in DevOps. From application servers and CI/CD platforms to containers and cloud infrastructure, Linux-based systems are widely used in modern technology environments. In my day-to-day DevOps activities, I regularly work with Linux commands to manage files, monitor processes, troubleshoot services, investigate network problems, analyze logs, and resolve production issues. This guide covers essential Linux administration concepts and commands that are useful for DevOps engineers, along with practical examples of how they can be applied during everyday troubleshooting. 1. Understanding Linux File Permissions Linux uses a permission system to control access to files and directories. The three basic permissions are: Read (r) – Allows a user to view the contents of a file or directory. Write (w) – Allows modifications to a file or directory. Execute (x) – Allows a file to be executed or a director...

DevOps

Search This Blog