Articles
Long and short posts on a wide variety of topics. In this format, I publish tutorials, share various development and monetization case studies (and many other topics), review various technologies, conduct research, and analyze the design and operation of various programs and tools.
In english/
Articles/
Server configuration
Why and how to solve server response delay, err_http2_ping_failed error, my investigation and solution
29.09.2024
12.09.2026
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In this article, I will describe in detail how I solved the problem of server response delays (err_http2_ping_failed) to client requests. I will describe the operation of the ERR_HTTP2_PING_FAILED error …
How to generate and use a SSH keys
26.02.2026
12.09.2026
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In summary, this guide explains how to generate a key pair for an SSH connection to a remote server. Also, how to transfer them to the remote server and how …
How to add user on Linux server
28.02.2026
12.09.2026
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How to add a user on a Linux server (Debian/Ubuntu/CentOS), why it's necessary, and how to make them an administrator. I'll briefly explain the differences between a privileged/root user and …
How to Fix SSL "CERTIFICATE_VERIFY_FAILED" and Migrate Email Between Hosts
27.03.2026
12.09.2026
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Struggling with SSL verification errors during email delivery? Learn how to solve the CERTIFICATE_VERIFY_FAILED issue in Python/Django and follow a step-by-step guide on migrating your corporate email server.
