Security-Enhanced Linux (SELinux) is a Mandatory Access Control (MAC) system built into the Linux kernel. One of the key features of SELinux is that it enables sysadmins to manage access control to system resources, blocking everything except for authorized users and processes. This article provides a closer look at SELinux and how it works.
The select() system call enables a program to keep track of multiple file descriptors.
In this article, learn about Linux select() in synchronous I/O multiplexing.
APT (Advanced Package Tool) is a widely-used package manager for Ubuntu and other Debian-based Linux distributions. This article introduces Nala, a command-line APT frontend that aims to provide a tidier alternative to the standard apt user interface.
The port number is a virtual concept in computer networking that provides a network identifier for a specific service or application. This article shows how to open a port in Linux and use Linux networking tools to list and test open ports.
Linux networking stack includes a wide range of network interfaces, protocols, and other components. This article focuses on sockets, an important network data-transfer mechanism used to build networked applications, implement network protocols and provide network services.
The ifconfig command is still used to configure network interfaces on Debian. Read this tutorial and learn how to install ifconfig on Debian and fix the "command not found" error.
Use the diff --color command to change the color of the diff output. This guide teaches you how to compare files the easy way.
The adduser command is the preferable and interactive way to add new user accounts and groups to a Linux system. Learn how to use the command and see some of the available options in this guide.
The ifconfig command is still widely used to configure any network interface in Linux. Read this tutorial and learn how ifconfig works.
Learn how to list and delete iptables rules and protect your system.
This tutorial will teach you how to harvest the full potential of the Linux firewall.