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Scala is a programming language that is starting to gain momentum in the last years. The popular TIOBE Index ranks it, as this article is written, as being more used than more popular languages like Haskell or Go. The TIOBE index, if you're not familliar with the name, is the somehow-authoritative source of information regarding programming language popularity.

If you're new to server administration and command-line, perhaps you haven't heard of terminal multiplexers or what they do. You want to learn how to be a good Linux sysadmin and how to use the tools of the trade. Or perhaps you're a seasoned administrator already and administer quite a few machines, and want to make your life a little easier. Or maybe you're somewhere in between.

This article will provide you with a core information on how to create boot-able Ubuntu Live customized isohybrid image to get you started with your own Ubuntu distro spin-off. The output image will be amd64 customized Ubuntu live image, capable to boot in all three boot modes: Legacy Bios, UEFI and SecureBoot.

Kimai is a free open source timetracker. It tracks the time you spend with various pre-set projects and prints out a summary of your activities on demand. The automated docker Kimai time tracker image “linuxconfig/kimai” can be used to instantly deploy the Kimai time tracker on your docker hosts.

The following lines will describe a procedure on how to mimic Ubuntu's sudo privilege authorization system on Debian Linux. Sudo allows users to run programs with the authorization privileges of another user by supplying their own password for authentication.

This article will explain a procedure on how to force fsck to perform a filesystem check on the next system reboot or force filesystem check for any desired number of system reboots whether it is root or non-root mount point.

This guide will discuss a procedure on how to connect/establish a VPN connection using PPTP protocol on CentOS 7 or Redhat 7 Linux.

Every time you update your CentOS Linux and the update includes a new kernel image update the system will not remove your old kernel but it will cumulatively add new kernel to the top of your Linux kernel installed list. Normally, this does not present any issue to your running system and you are not required to take any action to remove any old and unused kernel images.

RegRipper is an open source forensic software used as a Windows Registry data extraction command line or GUI tool. It is written in Perl and this article will describe RegRipper command line tool installation on the Linux systems such as Debian, Ubuntu, Fedora, Centos or Redhat. For the most part, the installation process of command line tool RegRipper is OS agnostic except the part where we deal with installation pre-requisites.

This article will provide you with some hints on how to generate random password using shell. Among many other tools which can be used on the Linux command line to generate random passwords such as openssl, mktemp, od or /dev/urandom the specific and easiest tool designed for this purpose is pwgen.

If you feel extremely lucky or your have a supercomputer to your disposal you my try to mine for bitcoins to earn some extra cash. The complexity of Bitcoin's block chain hashing algorithm gets stronger every 2 weeks to combat the Moore's law so be sure to bring in some decent hardware. In this article we will show how to easily deploy a Bitcoin mining node with docker.

In this config you will learn how to block or redirect web traffic based on the visitor's country geographical location using Apache's geoip mod.

This config will describe a procedure of how to back up a Docker container as well as it will also show how to recover a Docker container from backup.

In our scenario we are not going to run hundreds of operating systems and attempt to manage them. Our goal will be much simpler than that. In fact we are going to run only two separate systems running puppet master and puppet agent. Thus through the master puppet server we will attempt to configure a remote node and install "hello" package using puppet agent. This will be done with a bare minimum configuration possible.

The easiest way on how to determine whether a local or remote host is a virtual machine or bare metal physical server is to use Puppet Lab's tool facter.

Your terminal session may get closed due to various network issues while you are running a process on a remote machine. As the result of this network disconnection your ssh shell session will also inadvertently kill any child processes run under your ssh session on the remote machine.

Task is to configure x86 bare metal machine as a docker host using Debian 8. You will need a network connection to the host to follow this guide. Also a connected keyboard and monitor.

The automated build docker LEMP image “linuxconfig/lemp” can be used as a testing and also as a production environment for a dynamic PHP applications. It comprises of Debian GNU/Linux, lightweight and yet powerful Nginx webserver, MariaDB a community-developed fork of the MySQL relational database management system and PHP scripting language.

This article describes an upgrade procedure from Debian Wheezy to Debian Jessie. Debian Linux with a code name "Jessie" is the latest stable Debian release which succeeds previous stable version "Wheezy".

In this config we will setup a python virtualenv. The intention behind the use of virtualenv as a python development environment is to separate global system installed executables and libraries with packages installed directly inside virtualenv. As a result, one is able to test a given python application with multiple system environments on a single host.