Devops
DevOps tooling, automation workflows, CI/CD pipelines, and infrastructure practices.
How to Install Docker on Ubuntu 24.04
Install the latest Docker Engine on Ubuntu 24.04 from Docker's official repository, verify the service, and configure non-root access.
Docker: List Running and Stopped Containers
Use docker container ls and docker ps to list running and stopped containers, print names and IDs, filter results, and check Docker Compose projects.
How to Set Git Username and Email with git config
Set Git username and email with git config, both globally and per repository, check the current values, and update existing settings.
GitHub CLI: Manage Repositories, Issues, and Pull Requests
Use GitHub CLI to create and clone repositories, manage pull requests and issues, inspect workflow runs, publish releases, and call the GitHub API.
How to Add a Git Remote
Add a new remote to a Git repository with git remote add, then list, inspect, and push to it. Includes common errors and a git remote command reference.
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 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.
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.
