Linux World

    Opencart is an e-commerce building application based on php. It is an open software for setting up shopping sites,etc..,. It is an online store management system. It is also available in FTP server or we can configure it and run from our own servers.     In this article we are going to see how to install and run Opencart application in our system for building our own e-commerce site.     The prerequisite requirement to run Opencart application is the server should be a LAMP configured server, since it is a PHP based application.     If your system is already a LAMP configured one you are good to go if not you can check the below link for LAMP installation. For LAMP installation, RPM based machines: Click here for RPM based machines. Debian based machines: Click here for Debian based machines. Installing Opencart:     Download the latest opencart opensource package from their official...

    In our previous article we have seen how to create and run virtual machines from command mode. In this article we will be seeing how to create and run virtual machines through GUI.      The application we are using here is Virtual Manager collectively called as virt-manager .      The Virt-manager application is a desktop user interface for managing virtual machines through libvirt. It manages KVM VMs, Xen and LXC (linux containers). Virt-manager presents a summary view of running domains, their live performance & resource utilization statistics. The  Wizard enables the creation of new domains, and configuration & adjustment of a domain’s resource allocation & virtual hardware. Network Install:       Creating a VM using network install requires an internet connection to get the iso image according to the requirement. Step 1: Launch the Virtual Manager that you have...

    In this article we will be seeing how to run multiple virtual machines in our host machine through cli mode. Creating Logical volume for the Virtual Machine:     Since the VM needs physical requirements such as Hard-disk, Memory, CPU. We will allocate those from the host machine. For HD we will create a logical volume using the below command, $ lvcreate -L 50G -n ljunix.vmserver-1 kvm lvcreate command use to create the logical volume. -L stands for the size of the HD interms of GB -n is for the Virtual Machine name. kvm is the default path for the volumes being stored. The file path is /dev/kvm Installing the Virtual Machine:     Now our VM has some physical volume to run the installation, Since our Hypervisor is KVM we will be installing Kernel based virtual machines through virt command.     virt-install is a command line tool which provides an easy way to provision operating systems into virtua...

What is Virtualisation:     Virtualisation allows you to run multiple virtual machines on a single physical machine by sharing the resources in it. Virtual machines can be run in different operating systems on the same physical machine.     The Physical machine that runs multiple virtual machines is called as an hypervisor . Hypervisor:     A hypervisor or virtual machine monitor (VMM) is a computer software, firmware or hardware that creates and runs virtual machines.  A hypervisor runs one or more virtual machines is called a host machine, and each virtual machine is called a guest machine.     In this article we will be seeing how to configure a KVM Hypervisor. KVM - Kernel Based Virtual Machines:     Kernel-based Virtual Machine is a virtualization infrastructure for the Linux kernel that turns it into an hypervisor. KVM Installation: Installing qemu packages,  We need t...

    The Apache Tomcat software is an open source which helps to run Java Servlet, JavaServer Pages, Java Expression Language and Java Web-socket technologies. For your better understanding apache tomcat is a web server that serves JSP pages.     Apache Tomcat is trademark of the Apache Software Foundation.     In this articles we are going to install Apache Tomcat through source file on /usr/local/ directory. Where we going to run our web server. The default port for Apache Tomcat is 8080 .     Installing from source used to be very common and also quite simple. You would download the source file, unpack it (with either zip or tar), then issue the commands to the the directory you want to install it. Requirements to Run Apache Tomcat server:     Java to be installed, There is a single requirement for Apache tomcat that is, your server should be installed with Java or JDK. Installing Java: ...

    The Apache Tomcat software is an open source which helps to run Java Servlet, JavaServer Pages, Java Expression Language and Java Web-socket technologies. For your better understanding apache tomcat is a web server that serves JSP pages.     Apache Tomcat is trademark of the Apache Software Foundation.     In this articles we are going to install Apache Tomcat through source file on /usr/local/ directory. Where we going to run our web server. The default port for Apache Tomcat is 8080 .     Installing from source used to be very common and also quite simple. You would download the source file, unpack it (with either zip or tar), then issue the commands to the the directory you want to install it. Requirements to Run Apache Tomcat server:     Java to be installed, There is a single requirement for Apache tomcat that is your server should be installed with Java or JDK. Installing Java: ...

     In this article we are going to see how to install different Java version on your linux system and also how to make it as a default one. Installing through yum:     When we install java directly the current version is JDK-1.8.0_181 $ yum install java     To check the version of the Java use the below command, $ which java jhony@ljunix~$ which java /usr/bin/java $ java -version jhony@ljunix~$ java -version openjdk version "1.8.0_181" OpenJDK Runtime Environment (build 1.8.0_181-b13) OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)     We can run our applications on different Java versions through source installation. Installing through source:     Download the latest file from the official site. Click the following link for downloading the latest version ORACLE.COM . You have to accept the License Agreement to get the download link for the required version. Note: Yo...