Ubuntu is an open source operating system that based on Debian architecture . In this tutorial i am going to explain you , how to install Ubuntu on your virtual machine like VirtualBox . Virtual machine is an emulation of a computer system which provides a functionality of a physical computer .The main advantages of virtual machine is that you can run multiple operating systems on virtual machine without having to change what’s on your computer right now .
As a system administrator , you always have to download some software package . For this purpose you can use web browser or command line . You can use web browser in graphical mode . When you are using ssh or other command line application , then you rely on command line . We use wget command to download file from command line . It is installed by default in many linux distribution . If you want to download any file from command line , you should know URL of that file .
Shell is a program in unix-like operating system . It is used by user to interact with operating system . It receive input from user and execute program on the basis of that input . So we can say that it provides a environment in which we can execute our commands, program and scripts . There are many types of shell used in linux operating system . Some of these are – bash , sh , nologin, tcsh, csh and ksh . We will discuss about these shells in this article .
A user is a person who uses operating system . As a system administrator , you perform many task in your server. Some times you need to upgrade or maintain your server . At this condition you want some user are not able to login in your server or system . This is very necessary for security reason . In this article i will explain how to disable a user to login in linux .
File System is a method used by operating system to keep track files and directory on partition . In other words we can say that file system is used to control how data is stored or retrieved in partition . Linux support several types of file system . We will discuss about these file system in this article . In this article we will explain how to check file system type in linux . Before that first know about common types of file system used in linux . Each file system has its own properties and structure .
OSPF is link-state routing protocol . It is most widely used Interior Gateway Protocol . It computes the shortest path route using a method based on Dijkstra’s algorithm . It allows routers to dynamically learn routes from one router and advertise that route to other routers . In this article we will discuss about some important Open Shortest Path First interview questions . If you are interviewing related to network administrator , this article is useful for you .
Routing Information Protocol is one of the oldest routing protocol . It uses hop count as a routing metric . It is classified as a Interior Gateway Protocol (IGP) by Internet Engineering Task Force (IETF) . In this article i will explain some important routing information protocol interview question . These questions are very important for network administrator interview .It is designed for use in smaller network .