Linux

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 show how to configure ICMP-based network device monitoring using ping in Zabbix. It is the easiest and the most popular task of agentless monitoring, when you…

Zabbix is an enterprise-level open-source monitoring system. Currently, Zabbix is one of the most popular and powerful free monitoring systems. Due to its simple installation and configuration, Zabbix may be…

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 show how to solve problems that occur when a computer running Linux Ubuntu/Mint/Kali doesn’t boot or drops to a busybox prompt during the initramfs initialization. The user…

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 talk about how to resize KVM virtual machine disks for popular disk types. We’ll show how to correctly increase a virtual machine disk size in the…

The standard (official) RHEL/CentOS repositories offer a small number of basic packages that do not always contain the latest versions of programs. However, you can use third-party public or private…