A brief history of the Universe, galaxies, stars, planets, life, and technology — from darkness to mind.

Commands for creating self-signed certificates using the Russian GOST 2012 encryption standard.

Useful commands and macros for working with RPM and managing package building.

A post with examples of efficient use of count() queries in PostgreSQL, including analysis of query execution plans and optimization.

Guide to using file-level encryption in the ext4 file system, available starting with Linux kernel 4.1.