RHEL

In my work I sometimes come across a problem when Linux is booted with the “Welcome to emergency mode” message. Most often, this problem occurs after an emergency power outage on…

In this article we’ll look on how to install and configure the KVM hypervisor on a server running Linux RHEL or CentOS. We will show how to create a virtual…

In this article we’ll consider how to configure network on Linux CentOS/RHEL 7/8 and set network interfaces using configuration files, discover basic network configuration tools, etc. It is a relevant topic,…

In this article we will explore some methods of table/database compression and defragmentation in MySQL/MariaDB, that will help you to save space on a disk a database is located on.…

PHP-FPM (Fast Process Manager) is a separate implementation of FastCGI to run PHP scripts. You can use a combination of NGINX web server (processing static) and PHP-FPM to build a…

In this article we’ll consider how to connect free cloud storages like Google Drive or OneDrive in Linux CentOS. You can use them to backup data or just to exchange…

In this article we’ll show how to configure a tagged VLAN interface using native Linux tools on CentOS/Fedora/RedHat. We’ll study the configuration using subinterface, a separate vlanX file and tools…

In this article, we’ll consider a high-available failover configuration of two squid (Linux) proxy servers to access the Internet from a corporate LAN. To build a failover configuration we are…

In this article, we’ll learn the basics of how to configure services and scripts to start automatically in Linux CentOS/RHEL 7/8. In particular, we’ll get acquainted with systemd daemon, learn how to…