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Network monitoring in Linux involves tracking and analyzing network traffic, bandwidth usage, and connection statistics to ensure optimal system performance. Unlike general system monitoring that focuses on CPU and memory, network monitoring specifically targets data flow across network interfaces and helps identify bottlenecks, suspicious activity, and resource-hungry applications. Network Monitoring Tools Linux provides several powerful command-line tools for network monitoring, each serving different purposes − nload − Displays real-time network traffic statistics with visual graphs for interface monitoring. Speedometer − Shows network usage with customizable display formats and measurement units. iftop − Lists active network connections ... Read More
As the world continues to embrace digital transformation, more businesses are moving their applications and services to the cloud. However, some companies still require their own dedicated hardware to host their applications. This is where bare metal servers come in. Bare metal servers are physical servers that are not virtualized and are dedicated to a single customer. Bare metal servers are becoming more popular as they offer higher performance, reliability, and security than virtualized servers. However, managing bare metal servers can be challenging, especially when it comes to billing. To address this, many hosting providers offer a bare metal ... Read More
OpenVPN is a popular open-source VPN solution that provides secure remote access to network resources. Zentyal 3.4 is a Linux-based server platform designed for small and medium-sized businesses. This guide explains how to install and configure an OpenVPN server on a Zentyal 3.4 Primary Domain Controller (PDC). Step 1: Install OpenVPN First, update the system and install OpenVPN on your Zentyal server − sudo apt-get update sudo apt-get install openvpn Step 2: Generate Certificates and Keys OpenVPN uses Public Key Infrastructure (PKI) for authentication. Generate the required certificates and keys using the EasyRSA ... Read More
This article helps you understand the key features of Linux operating systems to choose the right distribution for your environment. The year 2016 marked a crucial period for Linux, especially in enterprise-level and consumer segments. As Linux has evolved significantly over the past two decades, various distributions now cater to specific use cases and requirements. Free/Open Source Server Distributions Debian and CentOS For server deployments requiring free or open-source solutions without subscription fees (unlike RHEL or SLE), Debian and CentOS are excellent choices. These community-based distributions offer high standards for server environments with long-term support, eliminating concerns ... Read More
This article will teach you how to schedule cron jobs for specific users in a Linux system. Cron is a time-based job scheduler that allows you to execute commands or scripts automatically at specified times and dates. General Syntax of a Cron Job MIN HOUR Day of month Month Day of Week Command 0-59 0-23 1-31 1-12 ... Read More
Linux is an operating system that has become popular for its open-source nature, flexibility, and reliability. Among its many features, Linux provides powerful tools for managing files and data, including the ability to concatenate files. Concatenation is the process of joining two or more files together, creating a single file that contains the contents of all original files. In this article, we will explore different methods of concatenating files in Linux with practical examples and use cases. Concatenating Files Using cat Command The cat command is the most common tool for concatenating text files in Linux. It ... Read More
BCC (BPF Compiler Collection) is a powerful set of dynamic tracing tools built on top of eBPF (extended Berkeley Packet Filter) technology in the Linux kernel. BCC provides a simple yet effective way to monitor system performance, analyze networking behavior, and trace various system events without requiring kernel modifications or recompilation. What are BCC Tools? BCC tools are designed to provide a user-friendly interface for using eBPF to trace and analyze system events. eBPF is a virtual machine that runs inside the kernel, allowing for efficient and flexible tracing of system activities. BCC tools are written in Python ... Read More
iCloud and BorgBase are cloud storage services designed for different purposes and operating systems. iCloud is Apple's comprehensive cloud service offering file synchronization, backup, and sharing across Apple devices. BorgBase provides secure, encrypted backup hosting specifically designed for Unix systems using Borg and Restic backup tools. What is iCloud? iCloud is Apple's cloud computing and storage service that enables users to store files, photos, and data across multiple Apple devices. The service automatically synchronizes content between devices and provides backup capabilities for iOS and macOS systems. iCloud integrates seamlessly with Apple's ecosystem, offering features like device recovery, family ... Read More
DOS and Unix are two fundamentally different operating systems that represent distinct eras and approaches in computing. DOS is designed for single-user, single-tasking environments on x86 computers, while Unix is a multi-user, multi-tasking system that supports various hardware platforms. What is DOS? DOS (Disk Operating System) is a single-user operating system originally developed by Tim Patterson as 86-DOS in 1980. Microsoft acquired it and released MS-DOS in 1981, making it the primary OS for early personal computers before Windows. DOS operates through a command-line interface (CLI) and is written in C and x86 assembly language. It features ... Read More
As a Linux user, it's essential to understand the concept of stream redirections. Stream redirections allow us to manipulate and control input and output streams of Linux commands. This means we can control where standard input, output, and error streams are going to and coming from. In this article, we'll guide you through the basics of stream redirections and show you how to use them with examples. Introduction to Stream Redirections In Linux, there are three types of streams − Standard Input (stdin) − This is the input stream that allows us to send data into ... Read More