// DevOps
Practical materials about infrastructure, networking, migrations, releases, and real problems solved in production.
72 DevOps materials published
Many website owners, startups and small projects want an email like info@вашдомен.ru, but aren’t ready to pay for corporate email hosting. ImprovMX solves this — it forwards incoming mail from your domain to any …
Read moreIntroduction Let’s Encrypt is the standard for obtaining free TLS certificates. Most often certificates are issued via the HTTP-01 method, which requires a reachable web server on port 80. However, for internal services …
Read moreMoving a website to a new server or restoring it after a failure can sound like a scary task, especially if you’re new to web development or administration. But don’t panic. With the right approach and a …
Read moreIntroduction If you are a beginner system administrator or developer, you’ve probably faced the task of managing network traffic. One of the most powerful tools for this is HAProxy, a high-performance load balancer for …
Read moreGetting a new VPS is just the beginning. By default, the server is insecure and not ready for production use. This checklist will help you step by step to prepare your VPS: close security holes, enable updates, and …
Read moreThis article is compiled as a “cheat sheet” for SOHO/SMB networks: common issues, their symptoms, causes, quick fixes, and diagnostic checklists. Suitable for both engineers and admins who maintain the …
Read moreIntroduction WP-CLI is the official command-line tool for WordPress, allowing you to manage your sites without logging into the admin panel. With WP-CLI, you can install plugins, update WordPress core, manage users, …
Read moreIntroduction Netplan is a utility for declarative network configuration in Linux (Ubuntu, Debian, and derivatives). It is usually used for simple cases like Ethernet or Wi-Fi, but it can do much more: tunnel interfaces …
Read moreIntroduction Imagine: ping works, DNS responds, ports are open, mtr shows no loss, but curl returns errors like connection reset by peer or SSL handshake failed. There’s clearly a problem, but standard tools are …
Read moreIntroduction Up to this point, we’ve used simple utilities for specific tasks: ping checked connectivity, traceroute showed the path, ipconfig and arp helped with the local network, telnet and nc tested ports. That’s …
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