Permission String

Question 1

Owner Permissions

Answer 1

Determine what the file’s owner can do with the file

Question 2

World or Other Permissions

Answer 2

Determine what users who are not the file owner or members of its group can do with the file

Question 3

Group Permissions

Answer 3

Determine what members of a group can do with the file

Question 4

Execute permission type

Answer 4

Can run as a program

Question 5

Permission string 3-digit Octal Code

Answer 5

• Numerical representation of permissions 0 to 7
• Starting with value of 0 and add a certain number based o the permissions

Question 6

What octal code number represents execute permissions

Answer 6

1

Question 7

What octal code number represents write permissions

Answer 7

2

Question 8

What octal code number represents read permissions

Answer 8

4

Question 9

Permission on symbolic links are always

Answer 9

777

Question 10

File Type Code

Answer 10

Represents the file’s type and is often omitted from descriptions when the file type is not relevant

Question 11

Types of File Type Code

Answer 11

• (-) normal data file
• (d) Directory disk
• (|) Symbolic link
• (p) named pipe
• (s) socket
• (b) block device
• (c) character device

Question 12

Parts of the permission string

Answer 12

1. File Type Code
2. Owner Permissions
3. Group Permissions
4. World or Other Permissions

Question 13

Directory execute bit

Answer 13

• Special bit that can be turned on or off
• Can grant or deny permission to search the directory

Question 14

User Mask (umask command)

Answer 14

• Determines default permission for new files
• Directory files default 777
• Non-directory files default 666
• Default can be changed