unix 13&14

What option for the iptables command can be used to specify the default policy for a certain chain type?

-P

Select the iptables option that specifies the destination address of packets for a rule:

-d

Where is the default document root directory for the Apache web server?

/var/www/html

In NTP, what stratum consists of atomic devices or GPS clocks?

0

What DNS resource record type is used to provide the IP address for the e-mail server for a zone?

MX

If the / filesystem becomes corrupted, the system is unstable and must be turned off.

True

The Very Secure FTP daemon is a stand-alone daemon.

True

What port is used by the Network Time Protocol (NTP) for communication?

UDP 123

Which command below can be used at a BASH command prompt to obtain a web page?

curl

How often are sar commands scheduled to run on both Fedora 20 and Ubuntu Server 14.04?

every ten minutes

What utility in the sysstat package measures the flow of information to and from disk devices?

iostat

What ftp command uploads the filename from the current directory on the local computer to the current directory on the remote computer, and allows the use of wildcard metacharacters to specify the filename.

mput filename

Running background processes using what command allows you to exit your command-line shell without ending any background processes?

nohup

What PostgreSQL command-line utility backs up PostgreSQL database settings?

pg_dump

What file contains the DSA public key in the /etc/ssh directory?

ssh_host_dsa_key. pub

Select the option that, when used with the sar command, displays swap statistics:

-B

What option can be specified with the rpm command to identify any missing files in a package or package dependency?

-V

What command can be used to change the maximum number of file handles that can be used by a program?

-d

Which sar command option is used to display statistics for the processor queue?

-q

What zone configuration file contains a PTR record used to identify the loopback adapter?

/var/named/named.local

What kind of servers resolve fully qualified domain names to IP addresses for a certain namespace on the Internet?

DNS

Select the SQL statement below that can be used to delete a database:

DROP DATABASE

What directive below in Apache's httpd.conf file specifies that the index.html file in the document root directory will be sent to clients who request an HTML document?

DirectoryIndex index.html

Almost all hardware problems are the result of damaged hardware.

False

If some users, such as software developers, need to run certain commands as the root user in certain situations, it is best to allow them to log on to the root user account via the su command.

False

Performance problems are caused by hardware, not software.

False

Performing regular system backups and identifying potential problem areas are examples of reactive maintenance.

False

The email command is an example of a Mail User Agent (MUA).

True

Assistive technologies are configured using what utility on Fedora 20 in GNOME?

Universal Access

What command can be used to view and modify the date and time within the BIOS?

hwclock

Older hardware that is malfunctioning may begin to send large amounts of information to the CPU when not in use. What is this process called?

jabbering

What command can be used to view what shared libraries are required by a certain program?

ldd

After modifying the /etc/aliases file, what command must be run in order to rebuild the aliases database?

newaliases

Which command can be used to see what network services are running on your network?

nmap

What command can be used to see what actual time servers are being used for synchronization?

ntp_query

If X Windows fails to start, what command can be used to troubleshoot the issue?

xwininfo

What is the maximum number of characters that can be used in a NetBIOS name?

15

What FTP command runs a shell on the local computer?

!

By default, the shell on a Linux system limits the number of filehandles a program can have open to what value?

1024

How can you specify the intended DNS server to query with the dig command?

@server

When connecting to the vsftpd daemon using an FTP client utility as the user "anonymous", you will be placed in the root user's home directory.

False

When working with Sendmail, what command can be used to test SMTP support?

HELO

What is the most common hardware component to fail on a Linux system?

Hard disks

After downloading an installing any shared libraries, what should be done to ensure the list of shared library directories and the list of shared libraries are updated?

Run the ldconfig command.

If applications run into difficulties gaining resources during execution and stop functioning, restarting the process using a specific kill signal may resolve the issue. Select the proper kill signal below:

SIGHUP

The Apache daemon listens for HTTP requests on what port by default?

TCP 80

If network services that are started by inetd or xinetd are in use, what can be used to provide extra security?

TCP wrapper

All DNS servers contain a DNS cache file.

True

By default, the smb.conf file shares all printers and home directories for recognized Windows users.

True

In order to change the time zone of a system after installation, what command must be used?

tzselect