Week 3 Lab Tasks

Md Zishan Kabir Chowdhury

ID NO :  182-15-11449

Section : A

1. What is shell?

Ans : Shell is an environment where we can run our commands, programs and shell scripts.

2. What is terminal?

Ans : Terminal is a program that runs a Shell.

3. What is user friendly in between terminal and GUI & why?

Ans : GUI is more user friendly than Terminal. Because in terminal we have to use commands, but in GUI, don’t need to command. And GUI is a graphical system.

4. What defines a user account?

Ans : : A user account is an identity created for a person in a computer or computing system.

5. What is root user?

Ans : On Ubuntu Linux root is a particular user account.

6. What is general purpose user?

Ans  : A general-purpose user is one that, given the appropriate application and required time, should be able to perform most common computing tasks. Personal computers, including desktops, notebooks, smartphones and tablets, are all examples of general- purpose users

7. What are the difference between root user and general purpose user?

Ans : The main difference between general purpose and  root user is  that root user can make changes to the system while the general purpose user can not.

8. What is the meaning of sudo?

Ans : sudo stands for “Super User do”.

9. What is the meaning of su?

Ans : su stands for “Substitute User”

10. Why we use sudo?

Ans : The sudo command allows you to run programs with the security privileges of another user.

11. Why we use su?

Ans: It allows users to execute commands as another user.

12. How to create a user account?

Ans : Type useradd followed by a space and the username for the new account you are creating at the command line (for example, useradd jsmith)

13. How to delete a user?

Ans : Use "sudo userdel 'username'”command.

14. How to login into a user account?

Ans: Use "sudo login 'username'”command.

15. How to logout from a user account?

Ans: Use 'logout' command.

16. How many times it requires password for creating a user account?

Ans : 2 times.

17. How to exit from root?

Ans : Just type exit and you will leave the root shell and get a shell of your previous user.

18. What is the meaning of sudo adduser {username}?

Ans: Create new user account.

19. What is the meaning of deluser {username}?

Ans: Delete user account.

20. What is the meaning of sudo su?

Ans : Switch to root user with all the privileges.