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Development tutorial - IT technology blog

OpenAPI Generator: Saving Developers from the Drudgery of Manual Client SDKs

By admin September 9, 2026

Don't let API schema errors crash your system at midnight. Learn how to use OpenAPI Generator to automate Client SDKs for TypeScript, Python, and Go, ensuring 100% data synchronization between services.

Monitoring

Advanced PromQL: Don’t Let “Average Numbers” Mislead You

By admin September 9, 2026

Don't be fooled by averages. Learn how to use Histogram Quantiles and Subqueries in PromQL to measure P99 latency and optimize your monitoring system.

Development

Managing Complex Logic with XState: Goodbye “Boolean Soup” in React

By admin September 9, 2026

Forget about 'Boolean Soup' and spaghetti code. Discover how XState helps you manage React logic professionally using State Machines and the Actor Model.

Database

Mastering dbt Core with PostgreSQL: From Fragmented SQL to Standardized Data Workflows

By admin September 9, 2026

Eliminate the headache of manual SQL management. A detailed guide on using dbt Core with PostgreSQL to automate data transformations, data testing, and documentation.

Security

Protecting SSH Keys with TPM 2.0 on Linux: Private Keys That Can’t Be Stolen Even with Root Access

By admin September 8, 2026

A practical guide to protecting SSH private keys with TPM 2.0 on Linux: keys are stored inside the hardware chip and cannot be stolen even if an attacker has root access. Covers installing tpm2-pkcs11, generating keys inside the TPM, and configuring SSH with PKCS11Provider so no key file ever touches disk.

Virtualization

Configuring Proxmox VE Replication with ZFS: High Availability and Disaster Recovery Without a SAN

By admin September 8, 2026

Proxmox VE Replication uses ZFS send/receive to sync VM disks between nodes every 15 minutes — a practical High Availability alternative to a SAN at zero cost. Covers step-by-step setup via CLI and Web UI, real-world failover testing, and automated monitoring to catch failures before they become incidents.

Git

Migrating SVN to Git with git-svn: Preserving Commit History and Branches for Legacy Projects

By admin September 8, 2026

A guide to migrating SVN repositories to Git using git-svn, preserving the full commit history, branches, and tags. Covers the complete real-world process: installation, author mapping, SVN cloning, converting branches and tags, pushing to a remote Git repo, and handling common issues.

Centos

CentOS 7 End of Life: How to Revive Yum When the Official Mirrorlist Is Gone

By admin September 8, 2026

CentOS 7 has officially reached EOL, causing widespread Mirrorlist errors. Learn how to redirect your repos to the Vault archive to fix yum and keep your system running.

Docker

Don’t Let CUDA Break Your System: How to Dockerize JupyterLab for Professional Data Science

By admin September 8, 2026

Direct CUDA installation often causes system errors. This article guides you on how to Dockerize JupyterLab with GPU support for a clean, stable, and professional Data Science environment.

Centos

How to Install Zabbix 7 on CentOS Stream 9: Real-World Infrastructure Monitoring

By admin September 8, 2026

A detailed guide on installing Zabbix 7 on CentOS Stream 9. Optimize IT infrastructure monitoring with MariaDB, Nginx, SELinux configuration, and automatic alerts.