Questions and Answers

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,…

MDADM is a tool that allows to create and manage software RAIDs on Linux. In this article we’ll show how to use mdadm (multiple disks admin) to create RAID array…

In this article we’ll consider the installation and configuration of an OpenVPN server running Linux CentOS/RHEL (7/8) and show how to join two remote computers (or offices) behind NAT into…

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 install PostgreSQL 11 on Linux CentOS 7, perform the basic configuration, consider the main configuration file parameters and performance tuning methods. PostgreSQL is a popular free…

In this article, we’ll show you how to set time, date, timezone, synchronize time with an NTP server and fix typical issues in CentOS Linux.

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…