What is the name of the software that prevents users from seeing all items or directories on a
computer and is most commonly found in the UNIX/Linux environment?

A.
Shell Kits

B.
Root Kits

C.
Ethereal

D.
Shadow data
E. Netbus

Explanation:
Shadowing, used for Unix password files hides the password hash.
IF SHAWDOWING IS ACTIVE:
————————If the shawdowing is active the /etc/passwd would look like this:
root:x:0:1:0000:/:
sysadm:x:0:0:administration:/usr/admin:/bin/rsh
The password filed is substituted by “x”.
The /etc/shawdow file only readable by root will look similar to
this:
root:D943/sys34:5288::
super user accounts
Cathy:masai1:5055:7:120
all other users
The first field contains users id:the second contains the password(The pw will
be NONE if logining in remotely is deactivated):the third contains a code of
when the password was last changed:the fourth and the fifth contains the
minimum and the maximum numbers of days for pw changes(Its rare that you will
find this in the super user logins due to there hard to guess passwords)