PostgreSQL’s Write-Ahead Logging (WAL) system plays a crucial role in ensuring data integrity and enabling features like replication and point-in-time recovery. However, WAL files can sometimes fail to be deleted, leading to excessive disk space consumption. In this article, we will explore three common reasons why WAL files might not be deleted in PostgreSQL and …

Ever wondered how companies like Instagram and Reddit manage millions of data points seamlessly? Behind many successful applications lies PostgreSQL, the open-source database powerhouse that’s been quietly shaping the digital world for over 30 years. Unlike your everyday spreadsheet, PostgreSQL  is like having a highly organized librarian who not only stores your data but ensures …

NetworkManager Tools NetworkManager is a system service in Linux distributions that manages network devices and connections. Here are some tools you can use to control NetworkManager and refresh the network interface configuration: nmcli: This is a command-line tool for interacting with NetworkManager. You can use it to control connections, devices, and other networking aspects. To …

This article provides a comprehensive guide on renaming network interfaces in Red Hat Enterprise Linux (RHEL), focusing on the differences between the traditional ifcfg format and the newer keyfile format for NetworkManager connection profiles. Understanding RHEL’s Network Interface Naming Traditionally, Linux kernels assigned interface names like eth0, eth1, etc., based on the order of detection …

Introduction to NetworkManager in Linux NetworkManager is a system service that manages network devices and connections on Red Hat Enterprise Linux (RHEL). It automatically creates connection profiles for each Ethernet adapter in a host and, by default, uses DHCP for both IPv4 and IPv6 connections. NetworkManager supports various network types, including Ethernet, bonds, teams, VLANs, …

Introduction to the vi Command vi (short for “visual editor”) is a screen-oriented text editor that is ubiquitous in Linux and Unix-like operating systems. It’s known for its power, efficiency, and modal editing approach, which can initially seem cryptic to new users but offers significant advantages once mastered. Modal Editing: vi’s modal editing distinguishes it …

Introduction to the nmcli Command The nmcli command is a powerful command-line tool in Red Hat Enterprise Linux (RHEL) used to manage network connections through the NetworkManager service. It provides a comprehensive interface for configuring, monitoring, and troubleshooting various network aspects, from basic Ethernet connections to advanced features like bonding, VLAN tagging, and more. Key …

In the ever-evolving landscape of network management, having the right tools at your disposal is crucial for ensuring seamless connectivity and efficient resource utilization. Two powerful command-line utilities, nmstatectl and nmcli, are at the forefront of managing network configurations in Red Hat Enterprise Linux (RHEL). While both tools serve the essential purpose of configuring and …

When I first encountered the Nmstate API, I was intrigued by its declarative approach to network configuration. As someone who has spent time managing network settings on Red Hat Enterprise Linux (RHEL) systems, I often found myself frustrated with the manual processes involved in setting up network interfaces. Nmstate promised a more streamlined way to …

In my experience with RHEL 9, I’ve found it to be an incredibly robust platform for managing networking configurations. One of the standout features is NetworkManager, which I’ve relied on extensively. This system service effectively oversees all network devices and connections, making my life much easier. What I appreciate most is the variety of methods …