Mail-Tester, Headers, and Received Chains
A 10/10 mail-tester score is not inbox placement. Read Authentication-Results, the Received chain, and spam headers on a real Gmail or Outlook copy.
Email8 min read
NetBay journal
Guides for operators
Practical guides for Linux, containers, CI/CD, self-hosting, and running VPS infrastructure from Netbay Engineering.
499 articles · 24 topics
AllLinuxLinux AdministrationWindowsLinux SecurityLinux NetworkingContainersContainers & OrchestrationKubernetesCI/CDGitHubSelf-HostingBackups & DataDatabasesApp DeploymentDNS & TLSObservabilityEmailAI AgentsAI InfrastructureAPI & AutomationProxiesCloud ArchitectureHardware & PerformanceDevOps Practices
ssh-audit and Disabling Legacy SSH Algorithms
Run ssh-audit against sshd, drop SHA-1 and CBC from the offer list, and keep a modern kex, cipher, and MAC set that still works with OpenSSH 9.
Linux Administration9 min read
Helm Basics: Packaging and Templating Kubernetes Charts
Package manifests into reusable Helm charts, parameterize values with Go templates, and install releases with a single command.
Kubernetes7 min read
CORS: What It Protects and Common Misconfigurations
Understand the same-origin policy, preflight requests, and the CORS mistakes that silently expose your API to arbitrary origins and attackers.
API & Automation7 min read
MTU, TCP Tuning, and the net.* sysctl Knobs
Tune MTU and TCP stack parameters through net.core and net.ipv4 sysctl knobs to improve throughput and reduce latency on Linux.
Linux Networking8 min read
Back Up a Windows VPS from the Command Line
Back up a Windows VPS from PowerShell and wbadmin: system state, selected files, and scheduled jobs you can restore without opening Server Manager.
Windows9 min read
Move the MariaDB Datadir to a Dedicated Disk
Move the MariaDB datadir onto a dedicated High-Speed SSD volume with a clean stop, copy, permission fix, and a systemd-aware restart you can reverse.
Databases9 min read
systemd Unit, Restart, and Log Rotation for Redis
Run Redis under the distro systemd unit with a sensible restart policy, then rotate logs so a busy instance cannot fill High-Speed SSD with redis.log.
Databases8 min read
Uptime Checks From Outside the VPS Machine
On-box probes cannot see a dead host or a blocked NIC. Add a cheap external HTTP check so someone else notices when your Lucknow VPS stops answering.
Observability8 min read
Python Deploy Script: git pull, pip install, migrate
Write a small deploy script that git pulls, installs pinned deps, runs migrations, and restarts systemd so Python releases stay boring and repeatable.
App Deployment8 min read
Shared-Nothing vs One-Box Monolith Decision Tree
Walk a practical decision tree: keep the monolith on one VPS until a named bottleneck, then split one concern instead of copying the whole stack.
Cloud Architecture8 min read
Deploy PHP with Git and a Shared Storage Dir
Ship PHP with git releases on the VPS: clone to timestamped folders, symlink current, and keep .env plus storage in a shared directory that deploys never wipe.
App Deployment9 min read