SysAdmin

The dmesg utility allows you to inspect the kernel ring buffer and check for errors during system startup. This tutorial shows how to use the dmesg command.

Docker is an increasingly popular software package that creates containers for application development. Essentially, it creates a uniform interface so that any application running on it is compatible with most operating systems. Developing in Docker also helps speed up applications, since it shares the kernel and other resources.

The cut command allows you to extract information from files or piped data. This tutorial shows how to use the cut command and its options.

The bash case statement simplifies complex conditional statements and tests input strings against specified patterns to execute a command when the condition is met. This tutorial shows how to use the bash case statement.

A file system is a set of processes that controls how, where and when data is stored and retrieved from a storage device. This article will help you learn about different Linux file systems, their main features, pros, and cons.

This article explains how to use the powerful dd command in Linux and why it's necessary to exercise caution through a set of practical command examples.

lsof is a practical sysadmin tool that prints a list of all open files. Read this guide to learn how to use the lsof command.

The make command is a widely used Linux tool. Makefiles and make cut down the time and effort needed to compile files. Read this guide to learn how to use make.

Legacy application migration is often a necessary and difficult process. This guide takes you through the benefits, challenges, and best practices when moving legacy applications to a new and modern system.

The most common reasons for GRUB not booting into the OS are another OS's bootloader overwriting the GRUB's boot configuration, or the missing GRUB configuration files. Read this tutorial to learn how to resolve the Linux boot failure issues.