1. User Interface
2. Process Control management
3. Dead lock management
4. Virtual Memory management
5. Secondary Disk scheduling management
6. Secondary storage management
7. System Administration and support
8. Recovery Strategies
9. Security Strategies
10. Standard Support
Ubuntu is mainly focus on Graphical User Interface (GUI) such as GNOME and K Desktop Environment (KDE). If you install GRUB boot loader then it has GRUB Display manager that will use to manage the login Interface with attractive GUI.
And other thing that Ubuntu use is command line interface. It is totally based on commands/codes. By using terminal, shell you can work with command line interface. As well as other thing is this command line interface doesn’t require so many hardware features because it has very small amount of hardware requirements. But this is requires very large amount vocabulary of commands or quires. Because of that only the power users can use this type other wise if some small command you forgot or typed wrong the whole task will be become useless thing.
Ubuntu uses GNOME for their desktop interface and it provides menus that display in both top and bottom. And Default human theme consist top panel and it has Applications, Places and Systems as well as other popular applications.
“Places” is used to go to directories such as desktop, home etc.
“System” is used for go to configuring applications such as GNOME, network configuring etc.
Ubuntu Login Interface is designed by GNOME and it also uses GDM (GRUB Display manager). First you have to enter Username and then after that you should enter your password to log-in. the user name and password is that you used when you installing the computer.
This also handled by GDM and when you press Shout down then it will automatically save your data and then comes to logout interface to inform that your going to logout or shut down the system. You can edit your sessions from GDM. From options you can select the session.
In Ubuntu you can have several working screens not like other operating systems and my clicking on that option button or my rolling mouse you can perform this task.
By using GNOME applets you can make your desktop colorful following are examples for configured desktops.