3.3 Turning Commands into a Script

Question 1

Scripting

numerical comparison

not equal to

Answer 1

-ne

Question 2

Scripting

numerical comparison

greater than

Answer 2

-gt

Question 3

Scripting

numerical comparison

greater than or equal to

Answer 3

-ge

Question 4

Scripting

numerical comparison

less than

Answer 4

-lt

Question 5

Scripting

numerical comparison

less than or equal to

Answer 5

-le

Question 6

Scripting

a simple script that will check if exactly two arguments are passed. If so, print the
arguments in reverse order.

Answer 6

if [ $1 == $number ]
then
echo “True!”
fi

Question 7

Scripting

arguments

positional

Answer 7

$1, $2, … $9

Question 8

Scripting

arguments

contains number of args passed to script

Answer 8

$#

Question 9

Scripting

arguments

contains directories that have executable used by the system

Answer 9

$PATH

Question 10

Scripting

all scripts begin with this character that defines the path to the interpreter

Answer 10

shebang

Question 11

Scripting

remove first element of an array

Answer 11

shift

Question 12

Scripting

contain exit code of last command executed

Answer 12

$?

Question 13

Scripting

contain all args passed to the script as an array

Answer 13

$@, $*