Citrus Roadmap and Known Issues

by Danila Vershinin, February 9, 2017

Stay up to date on latest development in Citrus servers world


Protect your signup forms from SPAM with NGINX and CleanTalk

by Danila Vershinin, September 6, 2019

Suppose you’re running Mautic on CentOS 7 machine. You’ve created a signup form and placed it on the front page of your website. The form is very simple: an input for an email address and Subscribe button. Bots are hitting it hard. They submit email addresses to your form, your database of subscribers have lots […]


NGINX and phpMyAdmin. When you have to…

by Danila Vershinin, August 18, 2019

The phpMyAdmin is the famous web client for MySQL databases. However, being an open-source product, it is subject to security vulnerabilities. The best thing is not using it at all. All the modern MySQL GUI clients support connecting via SSH tunneling. So you don’t have to open MYSQL port for outside. Neither you expose the […]


Boeing’s messy corporate website gives you a clue about the level of IT expertise… vs Airbus?

by Danila Vershinin, July 28, 2019

It appears that the Boeng corporate website is developed and maintained by low paid engineers from India, too.


DNS caching and beyond, in CentOS/RHEL 7 and 8

by Danila Vershinin, July 21, 2019

Make use of DNS caching on your CentOS/RHEL 7/8 to speed up your server even faster!


FirewallD and trusted IP addresses

by Danila Vershinin, July 10, 2019

How to whitelist IP addresses in FirewallD like a PRO


How to install Viber in CentOS 8 / RHEL 8

by Danila Vershinin, July 5, 2019

How to install Viber in CentOS / RHEL 8


How to install VirtualBox in RHEL/CentOS 8

by Danila Vershinin, June 22, 2019

1. Install Fedora repos sudo dnf -y install sudo dnf install fedora-release 2. Install Virtualbox sudo su dnfplus install VirtualBox 3. Install kernel-abi-whitelists sudo dnf install kernel-abi-whitelists 4. Build necessary modules akmods; systemctl restart systemd-modules-load.service 5. Rebuild modules automatically You can enable service to automatically rebuild VirtualBox required kernel modules, after you upgrade to […]


How to enable Intel hardware acceleration for video playback in RHEL/CentOS 8

by Danila Vershinin, June 21, 2019

Ensure Fedora repositories sudo dnf -y install sudo dnf install fedora-release Install VA-API implementation for Intel G45 and HD Graphics family dnfplus install libva-intel-driver Run vlc on the command line to check: vlc “” Output should include: [00007f03b06656e0] avcodec decoder: Using Intel i965 driver for Intel(R) Coffee Lake – 2.1.0 for hardware decoding Video […]


RHEL 8 machine as AirPlay receiver

by Danila Vershinin,

How to use RHEL 8 machine as Airplay target


50k+ packages for RHEL 8 / CentOS 8, even before EPEL is up

by Danila Vershinin, June 19, 2019

How to access 50K+ extra packages in RedHat Enterprise Linux 8 even before EPEL of CentOS 8 release.