Deck 17: Unix Linux Vulnerabilities

Question 1

In 1973, the developers of UNIX revised it by writing it in assembly language.

Answer 1

False

Question 2

Linux source code is available free of cost, and some Linux distributions (distros) are also free.

Answer 2

True

Question 3

A true command line interface (Terminal mode using tty1 through tty6) never goes into screen-saver mode.

Answer 3

True

Question 4

UNIX and Linux systems use Trivial File Transfer Protocol, or TFTP, to start diskless computers.

Question 5

You cannot use the mutt package in conjunction with PGP.

Question 6

Linux was derived from UNIX by an engineering student from Finland named ____ in 1991.

A)Ken Thompson
B)Steve Jobs
C)Linus Torvalds
D)Dennis Ritchie

Question 7

The first version of UNIX was written in ____ language.

A)C
B)Fortran
C)Lisp
D)assembly

Question 8

To delete an account in Linux, use the following syntax:

A)eraseuser account_name
B)userdel account_name
C)del account_name
D)accountdel account_name

Question 9

The ____ utility can be used for finding strings within files.

A)grep
B)locate
C)find
D)subexpr

Question 10

The r utilities use an insecure mechanism called ____.

A)rsh
B)rlogin
C)rallow
D)rhosts

Question 11

____________________ is the default and unchanging administrative user for UNIX/Linux systems.

Question 12

The ____________________ command helps users of a Linux operating system temporarily switch the current privileges available to those of the root account.

Question 13

Linux and UNIX-based operating systems use the sendmail daemon to send e-mail messages by employing ___________________________________.

Question 14

The ____________________ package allows system administrators to grant some or all root privileges to users listed in the sudoers text file.

Question 15

The wu-ftpd server allocates memory by using a function called ____________________.

Question 16

What are the basic exploits of a Linux system?

Question 17

What can go wrong if every user of a Linux system has unlimited access to resources?

Question 18

What are some of the Telnet service vulnerabilities?