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Linux Operations and Administration Final
Study ?'s for final for chapters 16-18 and 19 Vocab
48
Computer Networking
Undergraduate 3
11/20/2013

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Term
address spoofing
Definition
An attack most often used on packet-filter firewalls, which are configured to allow only known addresses to initiate connectons; attackers forge their source IP address and cause damage just by sending packets randomly.
Term
brute-force attacks
Definition
In these attacks, potential intruders use every possible combination of characters to guess passwords or encryption keys until the correct one is found.
Term
buffer overflow
Definition
A condition in which data that has exceeded a buffer's storage capacity overflows into another buffer
Term
CGI scripts
Definition
An executable script used to generate a dynamic Web page's contents
Term
denial-of-service (DoS) attacks
Definition
Attacks that overload a server with an overwhelming amount of network traffic so that it can't handle legitimate requests for network services
Term
distributed denial-of-service (DDoS) attack
Definition
An attack in which a large number of traffic sources are used to generate bogus traffic to a single system
Term
packet sniffer
Definition
A program that captures and views packets as they're transmitted over a network
Term
Pluggable Authentication Module (PAM)
Definition
A system tha provides a centralized mechanism for authenticating all services
Term
session hijacking
Definition
A specalized form of address spoofing in which a hijacker assumes unauthorized control of a network session
Term
TCP Wrappers
Definition
A widely used tool for logging connections and controlling access to network services
Term
Trojan programs
Definition
Hidden scripts embedded in authorized programs
Term
Which Linux command is used to set a quota for each user on the system?
Definition
edquota
Term
Which Linux commnad is used to enable disk quotas?
Definition
quotaon
Term
You have just modified the /etc/fstab file to add the usrquota option and need to create a quota file for users. What Linus command do you use to scan the quota-enabled file system so that it builds a table of current disk use?
Definition
quotacheck
Term
Which Linux command is used to display a summary of hard disk use as well as quotas for a specified fiel system?
Definition
repquota
Term
If you're using KDE and need temporary root privileges while using a GUI application, which command do you use?
Definition
kdesu
Term
Which Linux command do you use to change your user credentials to those of the root user?
Definition
su
Term
You're Linux administrator and need to allow a group of users to run certain commands as a root user? What command do you use?
Definition
sudo
Term
Which command do you use to start an X Window session from a terminal window?
Definition
startx
Term

If you have an X Window session open and need to adjust video settings, which command do you use?

 

Definition
xvidtune
Term
If you have an X Widnow session open and need to view display information , which command do you use
Definition
xdpyinfo
Term
Which runlevel, also known as halt, shuts down a Linux machine?
Definition
0
Term
Which runlevel, also known a single-user mode, is comparable with safe mode in Windows?
Definition
1
Term
Which runlevel, also known as X11, gives you access to all services, incluing GUI?
Definition
5
Term
Which of the following is a widely used version of X Window?
Definition
XFree86 and X.Org
Term
Which of the following statements about quotas is true?
Definition
By default, a user can exceed a soft limit by seven days and Administrators can use quotas to limit disk space as well as the number of files a user can own
Term
Which of the following can respond to network client requests?
Definition
NIS master server and NIS slave server
Term
NIS uses which of the following technologies for communication?
Definition
RPC
Term
Which of the following commands returns the NIS server's hostname?
Definition
ypwhich
Term
An NIS map consists of which files?
Definition
Index and Data
Term
Which of the following directories does NIS export data to?
Definition
/var/yp
Term
Which of the following configuration files specifies an NIS client's access rights to the NIS server?
Definition
/var/yp/securents
Term
The YaST NIS Server module must be downloaded from the openSuSe Web site. True Or False
Definition
True
Term
Which of the following terms is used for a physical pritner?
Definition
Printer driver
Term
Which of the following terms defines software used to manage the physical printer?
Definition
Printer driver
Term
Which of the following is a directory file where the printer daemon can store print jobs?
Definition
Print queue
Term
The subdirectory named after the NIS domain contains which of the following?
Definition
Databases for NIS maps
Term
Which of the following is the default policy for modifying the NIS configuration?
Definition
Using the netconfig script
Term
Which of the following information is provided by DHCP server?
Definition

Network subnet/host address 

Subnet/hostname

Subnet/hardware address

Term
Samba uses which of the following to authenticate users?
Definition
Passwords and Domains
Term
Which of the following is the Samba configuration file?
Definition
/etc/samba/smb.conf
Term
Which of the following commands do you use to connect to a Windows share in an interactive mode? The Windows server is mainoffice, and share name is documents. Make sure you aren't promted for a password.
Definition
smbclient //mainoffice/documents -N
Term
Which of the following commands is used to create and modify users in Samba?
Definition
smbpasswd
Term
What is the URL if you're accessing SWAT on the Samba server?
Definition
http://localhost:901
Term
Which of the following daemons controls SWAT?
Definition
Xinetd
Term
Parameters in the Samba configuration file are grouped in which of the following categories?
Definition
Global settings and Share definitions
Term
A domain controller handels which of the following in a Windows domain?
Definition
Authentication
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