DevOps

Featured snippet answer Linux logrotate prevents disk full outages by automatically rotating, compressing, and deleting old log files on a schedule. The safe approach is to rotate frequently enough to match log volume, compress archives, keep a defined retention window, and reload services correctly so they keep writing to the new file. This keeps storage predictable without destroying forensic value. The problem: logs grow until they break your server I broke this once by ignoring “small” log growth on a quiet VM, and it ended the same way it always does: the disk hit 100% and everything became weird. Package managers failed, services stopped writing state, and even SSH logins started timing out. ...

chmod vs chown explained with real life Linux scenarios and clear examples.

We, the guardians of data, in order to form a more perfect system against catastrophic data loss, establish this constitution. In a world where digital assets are the lifeblood of our work, a casual, “I’ll do it later” approach to backups is not just negligent—it’s a recipe for disaster. We need a system, a set of unbreakable laws to govern our data’s safety and resilience. This isn’t just another tutorial; this is a declaration of data independence from hardware failure, accidental deletion, and ransomware. Our chosen tool to enforce these laws? rclone. ⚙️ ...

Docker has become a cornerstone of modern application development. By containerizing applications, Docker streamlines deployment, simplifies collaboration, and promotes portability. This blog post delves into some fundamental Docker commands you’ll encounter frequently. Listing Docker Containers sudo docker container ls -a --no-trunc List all containers (including exited ones) without truncating names sudo docker container ls -a --no-trunc sudo docker container ls -a List all containers (running and stopped) sudo docker container ls -a sudo docker container ls -a -q List only container IDs sudo docker container ls -a -q sudo docker container ls -l List containers with detailed information sudo docker container ls -l sudo docker container ls -a --filter "" List containers based on filters (example: –filter status=running) sudo docker container ls -a --filter "" Running a Container sudo docker container run centos:7 ping 127.0.0.1 -c 10 Run a single instance of centos:7 image and execute ping command sudo docker container run centos:7 ping 127.0.0.1 -c 10 Viewing Container Information sudo docker ps List all running containers sudo docker ps sudo docker ps -a List all containers (running and stopped) with ps sudo docker ps -a Starting and Stopping Containers sudo docker container run -d centos:7 ping 127.0.0.1 Run a container in detached mode (background) sudo docker container run -d centos:7 ping 127.0.0.1 sudo docker ps Verify the container is running (after running in detached mode) sudo docker ps Inspecting Container Logs sudo docker container logs [containerid] View logs of a specific container (replace [containerid] with actual ID) sudo docker container logs [containerid] sudo docker container logs --tail [containerid] View only the most recent logs of a container (replace [containerid] with actual ID) sudo docker container logs --tail [containerid] sudo docker container logs --tail 10 [containerid] sudo docker container logs -f [containerid] Follow container logs in real-time (replace [containerid] with actual ID) sudo docker container logs -f [containerid] Additional Commands sudo docker container start [containerid]: Starts a stopped container. sudo docker container stop [containerid]: Stops a running container. sudo docker container rm [containerid]: Removes a container. Conclusion This blog post provides a brief overview of essential Docker commands. By mastering these commands, you’ll be well on your way to effectively managing containers and building robust applications with Docker. Note: Replace [containerid] with the actual ID of the container whenever applicable in the commands.

Docker is a powerful tool for containerizing applications. It allows developers to package their applications and all their dependencies into a single image, which can then be run on any machine that has Docker installed. This guide will teach you the basic Docker commands you need to get started with containerization. We will cover the following topics: What is Docker? Docker commands Understanding the output of Docker commands Troubleshooting Docker problems What is Docker? Docker is a containerization platform that allows you to package your application and all its dependencies into a single image. This image can then be run on any machine that has Docker installed. ...

Docker is a powerful platform that allows you to develop, ship, and run applications inside containers. Installing Docker on Debian is a straightforward process, and in this guide, we’ll walk you through the steps to get Docker Desktop up and running on your Debian-based system. Prerequisites Before we begin, make sure you have the following prerequisites in place: A Debian-based system (such as Debian itself or Ubuntu) Administrative (sudo) privileges ...