1.

Using a

single

pipe, w

hat command(s) would you use to extract all of the usernames from

a database called

/etc/passwd

and then sort this output alphabetically in reverse order?

The output of this command should appear as follows:

How would you run this same command and have the output saved in a file called

System_Users

?

Which command would you use to extract the first 15 characters in each line of the

/etc/passwd

file

?

The output

of this command

would appear as follows:

2.

What command would you use to find all empty

(0 byte)

files in the

/etc

directory?

The

output of this command appears as follows:

How could you run the same command and not have any e

rror messages show up on the

console?

The output of this command would appear as follows:

3.

What command would you use to find all files in

the /etc

directory that are

over 100

kilobytes in size

?

The output of this command would appear as follows:

4.

What command would you use to find all the instances in wh

ich the word

mail

is used

in the

/etc

directory and show this information

one screen at a time?

The beginning of

the output of this command would appe

a

r as follows:

(2 points)

5.

What

single

command

would you use to

determine

the number of

words

and c

haracters

in

the

/etc/

mailcap

file

but not the number of

lines

?

The output of this command would

appear as follows:

6.

What command would you use to view only the first

four (4

) lines of the

/etc/hosts

file?

The output of this command would appe

ar as follows:

What command w

ould you use to view only lines

5

-

10 of the

/etc/mailcap

file?

The

output

of this command

would appear as follows