Chp 1.1

Question 1

bash

Answer 1

GNU Bourne Again Shell

Question 2

/bin/sh

Answer 2

Pointer to default shell

Question 3

xterm; terminal; konsole

Answer 3

Terminal emulators

Question 4

uname (-a)

Answer 4

Shows operating system; -a shows more info, including kernel version and hostname

Question 5

cd

Answer 5

Change working directory; e.g. cd /home/sally

Question 6

cd ~

Answer 6

Change working directory to home directory

Question 7

pwd

Answer 7

Print working directory

Question 8

echo

Answer 8

Prints a line of text; e.g. echo “hello world”; -n omits newline with multiple echoes

Question 9

time

Answer 9

Times how long subsequent commands take to execute; Three times are displayed: total execution time (aka real time), user CPU time, and system CPU time

Question 10

set

Answer 10

Defines and determines the values of the system environment

Question 11

exit and logout

Answer 11

Terminates shell

Question 12

type

Answer 12

Tells whether subsequent command is internal or external; internal commands take precedent; enter full path of external command to run instead

Question 13

./

Answer 13

Current directory

Question 14

$PATH env variable

Answer 14

A list of directories in which commands can be found

Question 15

chmod

Answer 15

Edit permissions; To run, a program must be marked as executable

Question 16

Tab key in shell

Answer 16

Command completion

Question 17

Up key in shell

Answer 17

Command history, one at a time

Question 18

Ctrl+R in shell

Answer 18

Reverse search command history

Question 19

Ctrl+S in shell

Answer 19

Forward search command history

Question 20

Ctrl+G in shell

Answer 20

Terminates search

Question 21

Ctrl+A and Ctrl+E

Answer 21

Move to beginning and end of command

Question 22

Ctrl+B and Ctrl+F

Answer 22

Move back and forward on command one word at a time

Question 23

history

Answer 23

Shows command history

Question 24

!!

Answer 24

Show and execute last command

Question 25

mkdir

Answer 25

Make directory

Question 26

mv

Answer 26

Permanently moves the files or directories from one location to another and deletes the files in the source

Question 27

traceroute

Answer 27

Determine the route that IP packets originating from your system follow to reach the destination host

Question 28

Ctrl+C

Answer 28

Aborts program

Question 29

Ctrl+Z

Answer 29

Suspends program (puts into background)

Question 30

fg

Answer 30

Brings suspended program back up

Question 31

touch

Answer 31

Creates file

Question 32

less or more

Answer 32

Read a file; less opens faster

Question 33

$TERM

Answer 33

Terminal information env variable

Question 34

$PS1

Answer 34

Prompt env variable

Question 35

man and info

Answer 35

Manual of subsequent command; info supports hypertext

Question 36

help

Answer 36

Help on subsequent command