Secure Shell (SSH) is a powerful and widely used protocol that enables secure communication over a network. Whether you’re managing servers, deploying code, transferring files, or running remote applications, SSH is an essential tool for every IT professional and developer.…
What is SSH and How Does It Work? SSH (Secure Shell) is a powerful tool that lets you securely connect to another computer over a network. Imagine you have a computer in the moon and need to access a server…
If you’re running a Linux instance and suspect that the bandwidth is being overused, you can use a few tools to investigate what’s causing the high traffic. Tools like SAR, iftop, and NetHogs can help you identify the processes responsible…
You’ve been using Linux for a while, so you know the basics: ls, cd, cp.But now you’re stepping up your game. You need more. You’re ready to unlock the power of the Linux command line to elevate your workflow—whether it’s…
When you’re working with Linux systems, particularly those using systemd, journalctl is an essential tool for accessing and managing logs. journalctl provides a powerful and flexible way to query logs, troubleshoot issues, and monitor system events. In this guide, we’ll…
When working with Red Hat-based systems (like RHEL, CentOS, or Fedora), it’s important to be able to check when the system was rebooted and understand the reasons behind it. System reboots can happen for various reasons such as updates, crashes,…
Managing users in Linux is an essential aspect of system administration. Linux provides a number of commands for creating, deleting, and modifying user accounts. Below is a guide to some basic Linux user management commands that are commonly used: Key…
The systemctl list-dependencies command in Linux, using systemd, is a powerful tool for exploring the dependency relationships between various system units. In systemd, units can have dependencies on each other — for example, one service might require another service to…
In Red Hat Enterprise Linux (RHEL), the concept of targets plays a pivotal role in system initialization and systemd, the default system and service manager. A target in RHEL refers to a specific system state that determines which services, processes,…
A few months ago, I was managing a Linux server that hosted several critical applications, including a PostgreSQL database. As part of routine maintenance, I was tasked with setting up automated backups for the database. Everything was going smoothly, until…
