SysAdmin

The Linux mail command is a command-line utility that allows users to send and read emails from the command line. This tutorial shows how to use the mail command.

The bc command is a command-line utility in Linux allowing users to perform complex mathematical and arithmetic calculations. This tutorial shows how to use the bc command.

Use sync to synchronize your cache data to the permanent memory. This guide will show you how to use the Linux sync command with examples.

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.

Windows offers over 280 CMD commands to automate various tasks through the command prompt. Read this guide and grab our free cheat sheet to master the command prompt in no time.

Single and double quotes are often used in Bash to instruct the shell how to interpret the input string. This tutorial clarifies the difference between the two quote types.

chkdsk is a Windows utility that scans disks on the system and reports on the state of the stored data. This tutorial shows you how to use chkdsk to scan and repair your Windows drives.

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.

The Ubuntu 18.04 release dubbed Bionic Beaver is nearing its end of life, scheduled for April 30, 2023. This article explores available options for machines running Ubuntu 18.04.

UEFI and BIOS are two types of motherboard firmware used to wake up and check the system hardware during boot. This tutorial compares them and explains the use cases for each software.