week 8 lecture

Question 1

what is a loop

Answer 1

Perform a set of commands repeatedly

Question 2

what are the linux file permissions

Answer 2

-User: the file owner
-Group: a group of users; users are divided into groups to facilitate administrative tasks
-Other: everyone else on the Linux system

Question 3

what are linux file permissions

Answer 3

-Mechanism to provide protection to OS
-Permissions specify who can access a file and the type of access.

Question 4

what is a group

Answer 4

-Each user assigned to a primary group (e.g.“users”)
-Users can be members of other groups (secondary groups)
-Each file is owned by a user and a group

Question 5

what is authentication?

Answer 5

Process of verifying someone’s identity by checking his or her username and password against a central user database

Question 6

how can you modify user accounts?

Answer 6

usermod command
-Change user account information
-Only the root user can issue this command

Question 7

how can you delete user accounts

Answer 7

userdel command

Question 8

how can you create a group

Answer 8

groupadd command
newgrp command

Question 9

how can you modify groups

Answer 9

groupmod command