When using the Bash shell on a Linux system, we can send the output of a command to somewhere else, by passing it to another command or a file, for example. This is called Bash shell redirection. It is useful in many different scenarios, and is one of the most basic and essential components of learning to use the Bash shell and Bash scripting.
Commands
How to switch user on Linux
Linux is a multi user operating system, meaning that it supports having multiple simultaneous user accounts. Some Linux systems may have a few different accounts, and others could have hundreds, depending on the purpose of the system. Switching between user accounts is a common task for Linux administrators who are in charge of user account management, as it allows them to test permissions or troubleshoot problems.
How to switch to root on Linux
Linux users will inevitably need to log into the root account, or use administrator privileges, quite frequently. Tasks like installing or removing software, configuring system settings, adjusting file permissions, and many others usually require access to the root user account in order to perform. The root account can be accessed either by logging directly into the account, or by using the sudo Linux command to temporarily access root and execute a command with administrator privileges. In this tutorial, we will show you how to change to the root account on a Linux system, and how to use sudo to execute commands with root privileges.
Who Linux command: Explained
who is a very basic Linux command that is easy to learn and frequently comes in handy for Linux system administrators. It is a good way to see what users are logged into the system and information about each session. In this tutorial, we will explain how to use the who command on a Linux system, and go over all of its command line options. Follow along with our examples and you will quickly master this command and understand which situations it is most useful in.
Solving the ‘Command Not Found’ Error on Linux
While using the terminal of your Linux system, you will receive the Command Not Found error whenever a command you are entering is not accessible. In most cases, this could be due to a simple typo, or it could mean that you do not have the command installed yet. It could also indicate that the command is just missing from your system’s PATH environment variable, which is another easy thing to fix.
How to install Signal on Linux
Signal is a free and open source messaging application developed by the Signal Foundation: it is available on all the major operating systems such as Linux, Windows, Android and iOS, and supports all the major features one can expect, such as encryption, the ability to send files and make group calls. All the infrastructure behind Signal is open source, including the messaging protocol and the server software: the source code is available on github.
How to retrieve hardware information with dmidecode on Linux
Dmidecode is a free and open source utility we can use to retrieve hardware information on Linux. The tool is available in the repositories of all the major Linux distributions, and is able to inspect and dump the content of the SMBIOS table.
Basic Linux Commands
Linux beginners may get overwhelmed by the sheer number of commands that are available in the terminal, but most users will find themselves executing the same few commands over and over. If you are looking to get started with the Linux command line, we have listed 20 of the most important and basic commands that you should know. These basic commands are the most essential to learn, and also the ones you will likley find yourself using the most.
How to go to root directory in Linux
The root directory on a Linux system, which is represented by the / character, is the parent path to all files on the installation’s partition. All operating systems have a root directory. If you are familiar with Windows systems, they use the C:\ path as their root directory.
How to backup and restore an xfs filesystem using xfsdump and xfsrestore
XFS is a journaled filesystem originally developed by Silicon Graphics in 1993; it was released under the GPL license in the year 2000 and ported to the Linux kernel in 2001. Due to its high scalability and performances, XFS became the default filesystem in recent versions of Red Hat Enterprise Linux and its clones.
VIM tutorial for beginners
The Vim editor (and its predecessor, vi) is a command line editor for Linux systems. It has a long standing reputation as being the most powerful text editor on Linux. After mastering it, many users will even claim that it is far speedier and more convenient to use than a typical GUI editor packed with lots of features in its menus.
How to format data with Column in Linux
Column is a free and open source utility usually installed as part of the util-linux package in all the most common Linux distribution, and therefore included in even the most minimal installations. With this utility we can organize the content of files or the output of other commands in columns, creating pretty tables or even producing JSON formatted documents.