Chapter 1

Question 1

Shell

Answer 1

Program that accepts and interprets text-mode commands and provides an interface to the system

4

Question 2

Environment variables

Answer 2

placeholders for data that may be useful to many programs

4

Question 3

bash

Answer 3

most common default shell for user accounts

4

Question 4

sh

Answer 4

the Bourne shell

4

Question 5

tcsh

Answer 5

based on csh (a C shell). No major distros. similar to bash

5

Question 6

csh

Answer 6

the original C-shell

5

Question 7

ksh

Answer 7

the Korn shell. Bourne shell and the C shell extended

5

Question 8

zsh

Answer 8

the Z shell takes the Korn shell to the next level

5

Question 9

2 types of default shells

Answer 9

default interactive shell

default system shell

5

Question 10

/bin/sh

Answer 10

a pointer to the system’s default system shell

5

Question 11

uname

Answer 11

command showing which OS is being run

6

Question 12

cd

Answer 12

change directory

6

Question 13

~

Answer 13

home directory

6

Question 14

echo

Answer 14

displays the text that you enter

7

Question 15

time

Answer 15

tells you how long the system took to execute a command

7

Question 16

set

Answer 16

displays a wide variety of options relating to bash shell operation. These options are formatted much like environment variables, but they aren’t the same things.

7

Question 17

exit vs logout

Answer 17

exit terminates any shell

logout terminates only login shells

7

Question 18

Login shells

Answer 18

shell programs that are launched automatically when you initiate a textmode login as opposed to those that run in xterm windows or on other terminal emulators

7

Question 19

-a

Answer 19

shows if there are internal commands with installed duplicate external commands

7

Question 20

what happens when you type a command that the shell does not recognize as one of its internal commands?

Answer 20

the shell checks its path to find a program by that name to execute it

8

Question 21

command completion

Answer 21

type part of the command or a filename (as an option to the command or filename and press tab and the shell fills in the rest of it

9

Question 22

How long can filenames be?

Answer 22

up to 255 characters

10

Question 23

Retrieve command

Answer 23

Pressing the up button on the command line. It repeats the previous command. Guess what down does.

10

Question 24

backward/reverse search

Answer 24

Press Ctrl+R and begin typing characters that should be unique to the command from anywhere inside the command

10

Question 25

forward search

Answer 25

Ctrl+S reverses the search from backward to forward.

10

Question 26

What do you do if Ctrl+S causes a hang?

Answer 26

Ctrl+Q resumes terminal function

10

Question 27

Ctrl+A

Answer 27

moves the curser to the start of the line

10

Question 28

Ctrl+E

Answer 28

moves the curser to the end of the line

10

Question 29

Ctrl left/right

Answer 29

moves the curser left or right by a word

10

Question 30

Ctrl+D/delete

Answer 30

deletes the character under the curser as apposed to behind it

11

Question 31

Ctrl+T

Answer 31

transposes the character before the curser with the character under the curser

11

Question 32

Esc then U

Answer 32

Changes the letters between the curser and the end of the word to uppercase

11

Question 33

Esc then L

Answer 33

Changes the letters between the curser and the end of the word to lowercase

11

Question 34

Ctrl+X then Ctrl+E

Answer 34

launches a text editor

11

Question 35

history

Answer 35

displays all of the commands in the history up to 500

11

Question 36

!

Answer 36

executes the command that corresponds to the number that follows it

11

Question 37

man

Answer 37

loads the manual entry on how to use a command

14

Question 38

info

Answer 38

a manual in hypertext format

16