Linux Chapter 5

Front 1

The functions of the three permission types (read, write, and execute) are applied the same for files and directories. True or False

Back 1

False

Front 2

By default, only root can execute a file automatically.
True or False

Back 2

False

Front 3

Successful commands usually return the code 0 to the shell. True or False

Back 3

True

Front 4

You can use condition statements to create menu scripts that allow users to choose from a list of options. True or False

Back 4

True

Front 5

The if statement can only return a binary zero or one condition. True or False

Back 5

False

Front 6

Which symbol represents a permission that has not been granted?

Back 6

Hyphen (-)

Front 7

Which command is used to change permissions on files and directories?

Back 7

chmod

Front 8

which command removes write and execute permissions for the other category on file4?

Back 8

chomod o-wx file4

Front 9

what is the corresponding numeric notation for a file with rw-rw-r-- permissions?

Back 9

664

Front 10

_____ consists of binary ones and zeros.

Back 10

machine code

Front 11

the BASH shell is an example of a ______?

Back 11

interpreter

Front 12

with a compiled program, all the source code is converted to machine code and stored in a ___- before the users runs the scripts.

Back 12

binary file

Front 13

which command is used to display a list of all environment variables and their stored values?

Back 13

env

Front 14

to see a particular variables stored value, you can use the echo command and add ______ symbol before the variable name.

Back 14

$

Front 15

which variable assignment method would you use to specify in a script command?

Back 15

direct assignment

Front 16

which variable assignment method is useful when you need information from the user to complete the script?

Back 16

prompt

Front 17

when you run the scr1 script using the ./scr1 command, the filename is considered position zero in the command, and the text ./scr1 becomes the value of the ____variable

Back 17

&0

Front 18

which command will display the exit status code on the screen?

Back 18

echo $?

Front 19

which command ends a case statement?

Back 19

esac

Front 20

the case statement syntax requires a ______ to mark the end of each code portion matching a specific value.

Back 20

double semicolon (; ; )

Front 21

the cat command is usually used to display the contents of a _______

Back 21

small text file

Front 22

the head command displays the first ___ lines of a text file.

Back 22

ten

Front 23

what is the results of running the tail +5 scr8 command?

Back 23

the command displays the contents of the scr8 file starting at line five.

Front 24

which command displays a files contents on screen at a time?

Back 24

more

Front 25

A ______ is a set of rules for instructing a computer how to perform specific tasks.

Back 25

programming language

Front 26

with a ______ program, the source code is converted to machine code, line by line as the users runs the script

Back 26

interpreted

Front 27

the purpose of a _______ is to add documentation information for users and anyone else who might need to modify the script

Back 27

comment

Front 28

when you quit a program or a command a numeric code called a ______ is sent to the shell.

Back 28

exit status code

Front 29

____ is used to perform a set of commands repeatedly.

Back 29

looping

Front 30

_____ indicates the end of the condition being tested.

Back 30

fi statment

Front 31

________indicates the end of the code to be repeated.

Back 31

done statement

Front 32

______ a loop statement that specifies the number of times to execute the portion of code.

Back 32

for statement

Front 33

________ a loop statement that causes the interpreter to continue executing the code in the until loop portion of the script as long as the condition is false.

Back 33

until statement

Front 34

_____ starts the condition being tested

Back 34

if statement

Front 35

_____ a loop statement that tests a condition in much the same way as if-then statements

Back 35

while statements

Front 36

_______ starts the portion of code specifying what to do if the condition evaluates to false

Back 36

else statement

Front 37

______ indicates the beginning of the code to be repeated.

Back 37

do statement

Front 38

______ starts the portion of code specifying what to do if the condition evaluates to true.

Back 38

then statement

Front 39

why is it essential to understand the basics of shell scripting?

Back 39

it is useful for task automation and troubleshooting for the system administrator

Front 40

after creating a shell script and assigning execute permissions, how do you define its stored location and why must you do this.

Back 40

you enter a absolute or relative path. because the kernel looks in the directory paths defined in the path variable

Front 41

describe the case statement

Back 41

uses one variable to specify multiple values and matches a portion of the script to each value

Front 42

describe an until loop

Back 42

repeats the commands between do and done as long as the tested condition is false. until the condition is true

Front 43

describe a for loop

Back 43

repeats the commands between do and done a specific number of times.