In Linux based systems you can set dynamic named values as environment variables. These values are stored within system and that are used by shells. An environment variable is a variable with a name and an associated value. In this article, we will show you how to set and use environment variables. Environment and Shell
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Apache Tomcat is an opensource http server that used to implement Java Servlet, JavaServer Pages, Java Expression Language, and Java WebSocket technologies. This tutorial explains steps to Install Apache Tomcat on Ubuntu 20.04. Prerequisites# Before you start installation, make sure you are logged in as root or user with sudo privileges. Installing Java# Java SE
Vagrant is a command-line tool for building and managing virtual machines. By default, Vagrant can provision machines on top of VirtualBox, Hyper-V, and Docker. Other providers such as Libvirt (KVM), VMware and AWS can be installed via the Vagrant plugin system. Vagrant is typically used by developers to set up a development environment that works
Docker Compose is a command-line utility which used to setting up and running multi-container Docker applications. Generally, Compose is used for local development, single host application deployments, and automated testing. In this article, you will learn how to install Docker Compose on Ubuntu 20.04 Focal Fossa Linux. Prerequisites# Docker must installed on your Ubuntu system.
R is an open-source, widely used for developing statistical software and performing data analysis. It is supported by the R Foundation. This tutorial explains how to install R on Debian 10 Buster. Prerequisites# You should logged in as root or user account with sudo privileges. Debian 10 system should have atleast 1 GB of RAM.
Secure Shell (SSH) is a network protocol used for a secure connection between a client and a server. Each interaction between the server and a client is encrypted. This tutorial explains how to enable SSH on an Ubuntu machine. Enabling SSH will allow you to connect to your system remotely and perform administrative tasks. You’ll
Xrdp is an open-source implementation of the Microsoft Remote Desktop Protocol (RDP) server. It allows you to graphically control a remote machine. Using Xrdp, you can login to remote machine same as Microsoft Remote Desktop Protocol (RDP). In this tutorial, we will show you how to install Xrdp (Remote Desktop) on Debian 10 system. Prerequisites#
The mount command mounts (attach) file systems or a storage device and makes it accessible in the existing directory tree. While the umount command detaches the mounted file system from the directory structure. In this tutorial, you will learn how to attach and detach file systems using the mount and umount commands. List Mounted File
Typically, when writing bash scripts, we use echo to print to the standard output. echo is a simple command but is limited in its capabilities.To have more control over the formatting of the output, use the printf command. The printf command formats and prints its arguments, similar to the C printf() function. printf Command #
lsmod command is used to display the information of loaded modules in the Linux kernel. Linux kernel modules are system-level software that can be used directly by operating system kernel. Kernel modules# The Linux kernel is the core component of Linux operating systems. It manages the system’s resources, and communication between your computer’s hardware and