Yum repository is a central database of software that is used for installation/upgrade of packages on a Red Hat/CentOS based Linux server. This repository includes software that are used by system as well as for user level programs. An administrator can set-up a custom local yum repository instead of using the default ones provided by the OS for several reasons like: to provide normal or specialized software packages possibly in a restricted network environment; to maintain version levels across a set of servers; to optimize network bandwidth usage; to adhere to organization policy for maintaining security or possibly a combination ... Read More

VirtualBox is an open-source, cross-platform virtualization tool by Oracle which allows us to create and run multiple operating systems simultaneously on a single physical machine. As a Type-2 Hypervisor, VirtualBox is installed on top of an operating system such as Windows, Linux or Mac and provides both headless interface and GUI (Graphical User Interface) for creating and managing virtual machines. Installing VirtualBox Step-by-step process for installing VirtualBox on a CentOS 9 machine is as follows: Initially, check if your system supports virtualization with the command below: $ lscpu | grep -i virtualization Virtualization type: full $ In case, there’s ... Read More

Introduction The hostname is a label assigned to a device on a network that identifies it uniquely. In CentOS/RHEL 8, the hostname plays an essential role in identifying servers and their purpose. A hostname is used to identify servers by both people and other machines on the network. By default, CentOS/RHEL 8 assigns a random hostname during installation, which may not reflect the server's function or location; hence it's important to change it. The Benefits of Changing Hostname Changing your server's name can bring many benefits beyond just better organization and identification of servers within a network. Once you set ... Read More

Monitoring the performance of your CentOS server is essential for maintaining its stability, optimizing resource usage, and identifying potential issues before they impact your system. In this article, we will explore how to monitor the performance of CentOS 8/7 servers using Netdata, a powerful and user-friendly monitoring tool. With Netdata, you can gain real-time insights into various system metrics, visualize performance data, and effectively troubleshoot performance bottlenecks. Whether you are a system administrator, developer, or IT professional, understanding how to monitor your CentOS server using Netdata will help you ensure the smooth operation of your system. Installing Netdata on CentOS ... Read More

CentOS 8 provides a powerful feature called single user mode, which allows system administrators to troubleshoot and perform maintenance tasks on a Linux system. However, unrestricted access to single user mode can pose a significant security risk as it bypasses the normal system authentication. To enhance the security of your CentOS 8 system, it is crucial to password protect single user mode. By implementing password protection, you ensure that only authorized users with the correct password can access the system in single user mode. In this guide, we will walk you through the process of password protecting single user mode ... Read More

Accurate server time is crucial for various aspects of system administration, including synchronization between distributed systems, logging, security measures, and troubleshooting. In CentOS, a popular Linux distribution, there are several methods to obtain accurate server time. In this article, we will explore different approaches to ensure precise timekeeping in CentOS. We'll begin by checking the system time and verifying the time zone settings. Then, we'll dive into two common methods: using the Network Time Protocol (NTP) and the Chrony time daemon. Additionally, we'll discuss the hardware clock and its significance in maintaining accurate time. By the end of this article, ... Read More

Nginx has become one of the most popular web servers due to its high performance, scalability, and efficient handling of concurrent connections. As a vital component of modern web applications, it is crucial to monitor Nginx to ensure optimal performance and availability. That's where Netdata comes in. Netdata, a powerful open-source monitoring tool, provides real-time insights into server performance and resource utilization. With its intuitive web-based dashboard, Netdata offers a comprehensive view of your server's metrics, allowing you to identify bottlenecks, troubleshoot issues, and optimize Nginx for peak performance. In this blog post, we will walk you through the process ... Read More

In today's data-driven world, monitoring the performance and health of databases is crucial for ensuring the smooth operation of applications and the overall efficiency of your infrastructure. When it comes to monitoring MySQL or MariaDB databases on CentOS 8, Netdata emerges as a powerful and user-friendly tool. Netdata provides real-time insights into various metrics and performance indicators, allowing you to proactively identify bottlenecks, optimize resource utilization, and ensure the reliability of your database environment. In this blog post, we will explore how to set up and configure Netdata to monitor MySQL/MariaDB databases on CentOS 8. We will walk you through ... Read More

Follow these instructions to configure the XR (Crossroads) Load Balancer for web servers on RHEL/CentOS. Install the necessary dependencies and the Crossroads software package first using the package manager. To configure the load balancer, create a configuration file with the backend servers and load balancing formula. The Crossroads service should then be started, with its automatic startup feature enabled. Create firewall rules to let inbound traffic to the load balancer in addition. Last but not least, check the configuration by contacting the load balancer's IP address or hostname from a web browser and making sure that the requests are ... Read More

On RHEL/CentOS and Debian/Ubuntu, install Nginx, PostgreSQL, and Python requirements before configuring OpenERP (Odoo) 9 with Nginx. For OpenERP, create a PostgreSQL database and user. Extract the OpenERP source code by downloading it. Edit the configuration file to configure OpenERP. As a reverse proxy, configure Nginx to reroute requests. Setup Nginx to directly serve static files. Launch OpenERP and switch on automatic startup. To permit inbound connections, modify the firewall's rules. Access OpenERP through Nginx to check the configuration. Through this procedure, OpenERP 9 will be successfully installed alongside Nginx on RHEL/CentOS and Debian/Ubuntu. Methods Used Manual Configuration Docker ... Read More