NGINX Let Module: Arithmetic and Hashing in Config
by Danila Vershinin, March 11, 2026
The NGINX let module adds inline arithmetic, string concatenation, bitwise operations, and cryptographic hashing directly to your NGINX configuration. Learn how to install, configure, and use the let directive to compute variables on the fly — without Lua or external scripting.
Read More...NGINX error_log_write Module: Conditional Logging
by Danila Vershinin, February 12, 2026
Learn how to use the NGINX error_log_write module for conditional error logging. Write custom log entries based on request attributes, variables, and conditions directly from your NGINX configuration.
Read More...NGINX Bot Protection Without CAPTCHA: Testcookie Guide
by Danila Vershinin, January 30, 2026
Learn how to implement NGINX bot protection using the testcookie module. This JavaScript-based challenge blocks automated traffic without frustrating legitimate users with CAPTCHAs.
Read More...How to fix dnf after CentOS 8 went EOL
by Danila Vershinin, February 3, 2022
How to fix dnf upgrade on End-of-Life release of CentOS 8. Simple instructions in keeping your dnf client working in CentOS 8
Read More...Choosing your RHEL 8 clone after the death of CentOS
by Danila Vershinin, July 24, 2021
As CentOS is no longer an RHEL clone, companies seek another free clone of RHEL. What will it be? AlmaLinux, Rocky Linux, or Oracle Linux? We review these choices and give a recommendation.
Read More...How to fix yum after CentOS 6 went EOL
by Danila Vershinin, December 3, 2020
How to fix yum upgrade on End-of-Life release of CentOS 6. Simple instructions in keeping your yum client working in CentOS 6
Read More...How to install ElasticSearch for Magento 2 on CentOS/RHEL
by Danila Vershinin, September 29, 2020
How to install and configure ElasticSearch for Magento 2 on CentOS/RHEL operating systems via RPM repository
Read More...Stock CentOS kernel in OVH
by Danila Vershinin, January 28, 2020
OVH is a great dedicated hosting platform. Their kernels are not so great sometimes
Read More...Configure IKEV2 (Strongswan) VPN client in CentOS/RHEL 8 (Gnome GUI)
by Danila Vershinin, December 8, 2019
How to configure a Strongswan (IKEV2) client VPN connection in CentOS/RHEL 8
Read More...DNS caching and beyond, in CentOS/RHEL and Fedora
by Danila Vershinin, July 21, 2019
Make use of DNS caching on your CentOS/RHEL 7/8 to speed up your server even faster!
Read More...Recommended Web Hosting
