devops

Resolve SSH 'Permissions 0777 for id_rsa are too open' error. Set correct permissions: chmod 600 ~/.ssh/id_rsa, 700 ~/.ssh on Linux/macOS. Windows icacls fix included. Secure private keys properly.

Troubleshoot MSI packages not installing through Group Policy in Active Directory domains. Fix GPO scope, UNC paths, permissions, network timing, and MSI logging issues for reliable software deployment.

Install a specific Homebrew formula (e.g., postgresql@8.4.4) via versioned @-formulae or brew extract into a tap. Commands, linking, pinning and troubleshooting.

How Docker containers differ from VMs: kernel sharing, namespaces, cgroups, layered images for lightweight isolation, fast startup and consistent deployments.

Resolve pip uninstall error for databricks-dlt in Databricks: 'No input was expected ($PIP_NO_INPUT set)'. Use %pip uninstall -y databricks-dlt, restart Python with dbutils.library.restartPython(), and handle cluster libraries.

Master Dockerfile comments using # for single-line notes Docker ignores. Explore syntax, examples, parser directives, common mistakes, and best practices for clear dockerfile commands and builds.

Resolve 'Warning: Remote Host Identification Has Changed!' error in GitHub SSH from 2023 RSA key update. Step-by-step fix: ssh-keygen -R github.com, ssh-keyscan to add new keys, verify with ssh -T git@github.com for git push/clone.

Comprehensive guide to troubleshooting OpenELB external IP assignment issues in Kubernetes. Learn to resolve 'no registered speaker' errors and configure your load balancer kubernetes setup properly.

Learn how to keep Docker containers running with interactive shells using tty, stdin_open, and long-running commands. Solutions for docker compose exec and entrypoint configuration.

Exploring what happens when malloc'd memory isn't freed before C program termination. OS memory reclamation vs proper memory management practices for simple vs long-running applications.

Learn how to set up externalIPs in Kubernetes services using Helm charts. Fix 'pending' status, troubleshoot routing issues, and apply best practices for bare-metal k8s service exposure.

Learn how to use cURL with username and password authentication. Complete guide covering basic auth, security considerations, and troubleshooting authentication errors.

Learn how to run Node.js applications as background services using PM2, forever, systemd, and nohup. Cross-platform solutions for production deployments.

Learn how to completely remove Git commit history in GitHub while preserving your current code state. Step-by-step guides using orphan branches, git filter-branch, and repository re-initialization.

Complete guide to setting up a self-hosted VKontakte auto-posting solution using Mixpost. Schedule posts, create drafts, add images, and manage your VK communities with full control.

Fix VS Code Dev Containers failing to build Dockerfile with local images like openface:latest showing 'pull access denied' error. Docker build succeeds but BuildKit docker-container driver pulls from Docker Hub. Tag with localhost/ or disable BuildKit.

Set up automatic PXE boot for Windows 11 deployment using standalone WDS—no domain or paid software needed. Custom hostname menu, unattended installs, post-install Kaspersky, and Secure Boot compatibility included.

Resolve TypeError: Cannot add property $rewriteMetricName and __name errors when integrating Playwright engine into Artillery load tests in DevContainer. Step-by-step fixes for package.json, Dockerfile, and YAML config.

Discover top free VPS server trials for 30 days without a credit card. Professional data center options like VPSWala, RDPServerss, and GratisVPS with NVMe SSD, root access, and DDoS protection for real testing.

Configure Proxmox VE cluster network with LACP bonding on 25G fiber for Corosync/migration, separate management VLAN on vmbr1, VLAN-aware vmbr2 for VMs. Full /etc/network/interfaces examples, testing, no host routing needed.