Ubuntu is an open source operating system that based on Debian architecture . 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 . you can use web browser or command line . You can use web browser in graphical mode . We use wget command to download file from command line .
A user is a person who uses operating system .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 .
File System is a method used by operating system to keep track files and directory on partition . Linux support several types of file system . We will discuss about these file system in this article . 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