Devops
DevOps tooling, automation workflows, CI/CD pipelines, and infrastructure practices.
How to Undo Last Git Commit
Undo the last Git commit with git reset or git revert, and pick the right option to keep your changes, discard them, or safely undo a pushed commit.
How to Setup a Git Server
Run your own private Git server over SSH on Linux. This guide covers installing Git, creating the git user, adding SSH keys, and pushing your first repository.
Podman vs Docker: Differences and Migration Guide
This guide compares Podman and Docker across architecture, rootless containers, systemd integration, Compose workflows, image builds, and migration planning.
How to Change a Git Commit Message
Change or edit the last Git commit message with git commit --amend, or reword older commits with an interactive rebase. Covers pushed and unpushed commits.
How to Rename a Git Branch: Local and Remote
This guide shows how to rename a Git branch locally and on the remote using git branch -m, then push the new name and delete the old remote branch.
How to Revert a Commit in Git
Use git revert to safely undo changes from a previous commit by adding a new commit that reverses them, without rewriting pushed history.
Docker Networking: Connect Containers
Docker networking controls how containers communicate. This guide covers bridge, host, and none networks, port publishing, container DNS, isolation, and Compose networking.
How to Install Docker on Debian 13 (Trixie)
Install Docker on Debian 13 from the official Docker repo. Set up the apt keyring, install Engine and Compose plugin, and fix common errors.
.gitignore: Ignore Files and Folders in Git
Use .gitignore to ignore folders, files, logs, and build output in Git. See folder patterns, global rules, tracked-file cleanup, and debugging commands.
How to Install Docker on Ubuntu 26.04
Install Docker on Ubuntu 26.04 from the official Docker repository. Covers repository setup, verification, running without sudo, updates, and uninstall steps.
How to Install Docker on Ubuntu 24.04
Install Docker on Ubuntu 24.04 from the official Docker repository. Covers repository setup, verification, running without sudo, updates, and uninstall steps.
How To Delete a Local and Remote Git Branch
Git branches pile up fast after merging. This guide shows you how to delete local and remote branches, clean up stale tracking references, and recover a branch you removed by mistake.
Docker Run Command with Examples
Practical examples of docker run covering detached mode, port publishing, volumes, environment variables, restart policies, and interactive shells.
How to List Docker Containers
List running and stopped Docker containers with docker container ls and docker ps. Covers filtering, formatting output, showing sizes, and grabbing container IDs.
503 Service Unavailable Error: Causes and How to Fix It
The 503 Service Unavailable error means the server cannot handle your request. This guide explains what causes it and how to fix it on Nginx and Apache.
How to Remove Docker Images, Containers, Volumes, and Networks
Remove unused Docker containers, images, volumes, and networks to free disk space. Covers docker system prune, selective removal, filters, and force options.
How to Connect to a Docker Container
This guide explains how to connect to a running Docker container using docker exec and docker attach, with examples for getting a shell, running commands, and viewing logs.
