FINAL STUDY GUIDE

Which of the following characters, when pressed while the top program is running, will allow you to change the niceness of a process?

r

What FTP command runs a shell on the local computer?

!

Which of the following options can be used with the usermod command to change the description of the user account that is stored in the GECOS field?

-c

What option can be used with the ps command to display an entire list of processes across all Terminals, including daemons?

-e

A system administrator wants to allow most users to be able to run cron jobs, but wants to specifically prevent a couple of users from doing so. Which of the following files could the administrator edit to disallow these users from creating cron jobs?

/etc/cron.deny

In which directory would a system administrator store scripts that should be run monthly by the cron daemon?

/etc/cron.monthly

Which of the following files does a TCP wrapper check before starting a network daemon?

/etc/hosts.allow and /etc/hosts.deny

If someone tries to log into a system using a daemon account, but the daemon account does not have a valid shell assigned to it, they would normally see a standard warning. If you want to customize the error, which of the following files can you put a message in that will display upon an attempted login?

/etc/nologin.txt

Chapter 10 In which of the following directories can you place files that will be copied to new user directories when new users are created?

/etc/skel

Where does the sudo command check to determine a user's privileges when they attempt to run the sudo command?

/etc/sudoers

What is the path to where the journald.conf file is located?

/etc/systemd/journald.conf

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

/var/www/html

Which of the following commands can you use to send a print job to printer1? (Choose all that apply.)

1p -d printer1 mydocument.txt 1pr -P printer1 mydocument.txt

Which of the following commands can be used to set the default printer for all users on a Linux system where printer1 is the name of the printer?

1poptions -d printer1

Which of the following commands will display the print jobs in the print queue for printer1 only?

1pstat -o printer1

Which of the following results from the nmap command would let an administrator know that they have an insecure service running on a Linux server?

23/tcp open telnet

Which of the following packages should be installed in order to integrate certain authentication functions with Microsoft's Active Directory?

Kerberos

What is contained in the DISPLAY variable on a Linux system running the X window system?

Which X server the client is supposed to connect to by default.

Which of the following commands can be used to pause a printer named Printer1?

cupsdisable Printer1

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

curl

Which of the following commands will list the BIOS information about a device when it cannot otherwise be detected by a Linux system?

dmidecode

Which of the following commands will generate a GPG public/private key pair?

gpg--gen-key

Chapter 11 After compiling source code, which command still needs to be run in order to copy the newly compiled binaries into a directory listed in the PATH variable as well as copy supporting files (such as man pages) to the correct location on the filesystem?

make install

On a system running NetworkManager, which of the following commands can be used to view or modify connection information?

nmcli

Which of the following can be used preceding a command to prevent a process from terminating when the parent process terminates?

nohup

Which of the following permissions should a standard user have on the /etc/shadow file? read read and write read, write, and execute none of the above

none of the above

Which of the following commands will show a list of process names along with their process ID (PID)? (Choose two.)

ps, top

Which of the following commands will install a package using the Red Hat Package Manager, showing all information, while printing pound signs to show the progress of installation?

rpm -ivh packagename.rpm

Which of the following commands can be used to force udev to reload new rules from the /etc/udev/rules directory? (Choose all that apply.)

udevadm control --reload udevadm control -R

Which of the following utilities will allow you to view information about virtual memory usage on a Linux system?

vmstat

Which of the following is the full path and file name where the Debian Package Manager repositories can be configured?

/etc/apt/sources.list

Which of the following files does the hostnamectl command modify to set the hostname on a machine?

/etc/hostname

Which of the following ports should you disable so that they no longer respond to network requests on a Linux system due to a lack of encryption? (Choose all that apply.)

21 23

Which of the following environment variables can you change the value of to set the default printer on a Linux system? (Choose two.)

PRINTER LPDEST

Which of the following are examples of multifactor authentication?

Password and fingerprint reader

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

MX

Which of the following types of DNS records need to be configured to facilitate email delivery?

MX

Which of the following is the log file where Dandified YUM writes its log entries?

dnf.rpm.log

Which of the following are valid statements in the /etc/resolv.conf file? (Choose two.)

domain comtia.org nameserver 10.1.1.4

You want to determine whether your Linux workstation was able to get assigned an IP address from the DHCP server once you connected it to the network. Which of the following legacy commands might help you determine this?

ifconfig eth0

The system administrator has shut ethernet interface eth0 down while making some changes to the system. Which of the following commands can they use to bring the network connection back up?

ifup eth0

What command looks for a Makefile and uses the information within it to compile the source code into binary programs using the appropriate compiler program for the local hardware architecture?

make

Which of the following commands can be used to trace an IPv6 route? (Choose two.)

traceroute6 tracepath6

Which of the following commands can be used for the command line version of a popular GUI-based program that is used to examine network traffic passing to and from a network interface?

tshark

Which of the following commands will prompt you to answer a series of questions to help determine which time zone file you should use?

tzselect

Which of the following commands can be used to set the number of days until user account jsmith with an expired password is disabled?

usermod -f 15 jsmith

Which of the following is the first field of the /etc/passwd file?

username

If incompatible X Windows settings are configured, where will the errors that are generated be written to?

~/.xsession-errors

Which of the following entries could be added to the rsyslog.conf configuration file to have all syslog messages displayed to console 10?

*.*/dev/tty10

Which of the following options for the gpg command will specify the key that should be retrieved?

--recv-keys

Which of the following RPM options will update a software package to the newest version, or install the package if it does not already exist on a system?

-U

When using the compress command to archive a set of files into a single file, which of the following options will display the compression ratio of the individual files making up the new compressed file?

-v

Which of the following file extensions are used by the Debian Package Manager?

.deb

Which of the following is not a valid compression file extension for the Linux operating system?

.vz

Upon running the ifconfig command, the IP address is listed along with the subnet mask in dotted decimal notation listed as 255.255.255.224. You have installed a remote access software that has an address field that requires the address to be configured in CIDR notation. Which of the following is the equivalent CIDR notation for the subnet mask listed?

/27

The System Log Daemon, rsyslogd, creates a socket for other system processes to write to. What is the path to this socket?

/dev/log

On a system running SysV init, which of the following files can you edit to disable the ability to reboot by using the Ctrl+Alt+Delete key combination?

/etc/inittab

Which of the following files is where the default runlevel is set on some Linux systems?

/etc/inittab

Which of the following files contains the list of shared libraries?

/etc/ld.so.cache

Which of the following files is a binary file that contains the rules for calculating the time based on your time zone relative to epoch time?

/etc/localtime

Chapter 13 Which of the following files contain the path and filename where DNS servers should be configured?

/etc/resolv.conf

In which file can you configure rules for logging on a Linux system?

/etc/rsyslog.conf

What is the complete path and filename of the file where ports and their associated protocols are defined? ___________

/etc/services

Which of the following files contains the encrypted passwords for users on a modern Linux system by default?

/etc/shadow

In addition to /etc/localtime, some Linux distributions also have an /etc/timezone text file that contains a reference to the correct time zone file contained in which directory?

/usr/share/zoneinfo

Where are the files stored that contain information for all of the time zones that could be recognized by a Linux operating system?

/usr/share/zoneinfo

Which of the following files stores information about failed logins on a Linux system?

/var/log/btmp

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

/var/named/named.local

Where are scheduled commands stored on Ubuntu Linux systems?

/var/spool/cron/atjobs

Which of the following is a valid APIPA address?

169.254.38.101

Which of the following is the highest value that can be set for the nice value which would result in a greater chance of a lower priority?

19

The output of the ifconfig shows a HWaddr expressed in hexadecimal. How many bits is the hardware address shown made up of?

48

Which of the following ports would be used to resolve a domain name to an IP address?

53

If no level of compression is specified, the gzip command assumes what compression level?

6

Which of the following is the default desktop environment used by Linux Mint?

Cinnamon

Violet wants to configure an encrypted partition to mount when her workstation boots up. Which of the following should she do?

Configure /etc/crypttab to open the volume and then /etc/fstab to mount it.

If a process state is currently showing as uninterruptible sleep, which letter will show in the output of the ps command?

D

In which of the following zones might a system administrator put the web server hosting the company's publicly accessible website?

DMZ

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

DNS

Which of the following SQL statements can be used to delete a table from a database?

DROP TABLE table_name;

Which of the following does the -r option for the gpg command specify?

Encrypt for the user id given

Which of the following is an on-screen keyboard used with Linux?

GOK

Which of the following statements should be used at the end of a SQL statement where an aggregate function such as SUM or COUNT is used?

GROUP BY

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

HELO

Which of the following types of joins will return a record from two intersecting tables only if there is a match on the joining field from both tables?

INNER JOIN

Which of the following is a valid SQL statement for adding a new row of data to a SQL database table?

INSERT INTO users (firstname, lastname) values ('George', 'Washington');

Which of the following commands can be used to see files that are currently being used by a specific process ID (PID)?

Isof

Which of the following options is passed to the Linux kernel from the GRUB2 configuration file to set the locale?

LANG

When logging into a system, you are prompted to type in a code from a small token that you carry around with you. The code on this token constantly changes. What type of technology has been implemented?

OTP

Which of the following is the default option for the kind of keys to be generated when using the gpg --gen-key command?

RSA and DSA (quiz said RSA and RSA)

Which kill signal terminates a process by taking the process information in memory and saving it to a file called core on the hard disk in the current working directory?

SIGQUIT

Which of the following does Click Assist do?

Simulates a right click by holding down the left mouse button.

Which of the following accessibility features simulates simultaneous key presses when two keys are pressed in sequence?

Sticky Keys

Which of the following is a valid Linux initialization process?

Systemd SysV

Which of the following is a protocol originally developed by Cisco that uses TCP to handle authentication, authorization, and accounting services?

TACACS+

Which of the following can you use to start network daemons in order to limit which computers are allowed to connect to the network service?

TCP Wrapper

What is the most commonly used LAN protocol?

TCP/IP

Which of the following system variables can you modify to override the default system timezone within your current shell?

TZ

Which of the following types of technologies will create a tunneled encrypted connection from a remote location into a corporate network to be able to access resources as if the user was physically connected to the LAN?

VPN

Which of the following does a Linux kernel use to store the value of epoch time?

The number of seconds since January 1, 1970

You have set up a TFTP server to support PXE booting of several workstations. Which of the following protocols would this setup make use of?

UDP

Which of the following is responsible for starting tasks and services during boot, stopping them during shutdown, and supervising them while the system is running?

Upstart

When looking at the password-auth file on a Fedora system, you notice part of the syntax that says dcredit=3. What is the significance of this part of the configuration?

Users must use at least 3 characters as numbers in their passwords.

Which of the following can be used to graphically remotely administer a Linux machine?

VNC

Which of the following is a lightweight desktop environment that uses very few system resources that a system administrator might choose to install on a Linux server instead of one of the two main desktop environments?

XFCE

Which of the following is a tool that can be used to search Internet software repositories for RPM packages that map to your system's architecture, and automatically install or upgrade those packages on your system?

YUM

Which of the following package managers are used to install RPM packages on the SUSE or openSUSE distributions by default?

Zypper

Which of the following is not a valid Apparmor command?

aa-trust

Which type of CM software can connect to inventory members via SSH to perform configuration management activities?

agentless

Which of the following commands can be used to install the latest versions of all packages currently installed on the system from the sources configured in sources.list?

apt upgrade

Which of the following commands can you use to search available repository information? (Choose two.)

apt-cache apt

Chapter 14 If a Linux system is running as a virtual machine, it may be using a bridge for the virtual network adapter within the virtual machine to the physical network adapter. Which of the following commands can be used to view or modify the bridge configuration used by the Linux kernel for your network adapter?

brctl

Which of the following will display the contents of the /etc/shadow file? (Choose all that apply.)

cat /etc/shadow getent /etc/shadow

Which of the following is used on modern Linux distributions that reads YAML configuration files to add apps, modify existing configuration settings, or perform administrative tasks at boot time?

cloud-init

Which of the following commands can be used to back up files in case of system failure, supports long filenames, and can also back up device files?

cpio

Which of the following commands will show the current user cron jobs that have been created for the currently logged in user?

crontab -l

Chapter 9 You have run the top command successfully, but realize that the q key on the keyboard has suddenly stopped working. What is another way that you can exit out of the top program?

ctrl-c

Which of the following commands will display the number of seconds that have elapsed since January 1, 1970?

date +%s

Which of the following types of CM software only requires that you specify the attributes that the inventory members must have within a configuration file, not the individual procedures that must be executed on them?

declarative configuration

Emily accidentally created a new user account on the wrong server. Which of the following commands could she use to delete the account she created? (Choose all that apply.)

deluser userdel

Which of the following commands can be used to modify configuration options for DPM packages after they have been installed?

dpkg-reconfigure

Which of the following commands can be used to view the quota for a user?

edquota -u jsmith

Which of the following commands will display detailed information for network hardware?

ethtool

Which of the following commands can you use to list users who have been locked out by pam_faillock.so?

faillock

After a background process has been started, what command below can be used to move it to the foreground?

fg

You have started a job running in the background that you want to now bring to the front so that you can watch it execute. Which of the following commands can be used to display the job's output to the terminal?

fg

Which of the following is the keyword that should be listed after the hosts statement in the /etc/nsswitch.conf file so that the system will consult the /etc/hosts file to resolve a name to an IP address?

files

If you suspect that you have bad blocks on a filesystem, which of the following commands can be used to try and repair the filesystem?

fsck

Which of the following will display entries from the Name Service Switch libraries?

getent

Which of the following commands can be used to remove a group from a Linux system? (Choose all that apply.)

groupdel delgroup

Which of the following commands can a user run to display the groups that they are a member of?

groups

You run the command hostname server1 and issue the reboot command. You notice that the host name has reverted back to what it was before the reboot. Which of the following commands should you have used to change the host name instead?

hostnamectl set-hostname server1

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

hwclock

Which of the following can be used to compare the hardware clock to the system clock, writing a new result to a new line every 10 seconds?

hwclock -c

Which of the following commands can be used to convert files between different character encodings?

iconv

Which of the following can you use to configure firewall rules for IPv6 on a Linux system?

ip6tables

Which of the following commands can be used to only show jobs that have been paused.

jobs -s

Which of the following commands can you use to view events within the journald database?

journalctl

Which of the following commands will send a process's resources to /dev/null to kill the process for process ID 1357?

kill -9 1357

Chapter 12 When connecting to a host via SSH for the first time, the user is prompted to accept the encryption fingerprint for the target computer which is stored in ___________ in the ~/.ssh/ directory.

known_hosts

Which of the following commands will list missing libraries as not found if a necessary library is not installed?

ldd

Which of the following commands will show a number of environment variables that start with LC_?

locale

Which of the following commands can be used to display the current locale of a system? (Choose two.)

locale localectl

Which of the following commands can be used to display any email messages awaiting delivery alongside the reason that they were not delivered?

mailq

Which of the following files holds the configuration information for GRUB Legacy on Ubuntu Linux systems?

menu.lst

Which of the following commands will generate a new initramfs?

mkinitrd dracut

Which of the following is the default window manager used by the GNOME version 3 desktop environment?

mutter

Which of the following commands will show active UDP connections on a Linux system? (Choose all that apply.)

netstat -u netstat --udp

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

newaliases

Which of the following utilities can be used by a system administrator to determine which services are responding to network requests?

nmap

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

pg_dump

Which of the following commands can be used to determine the round trip time that a packet takes to traverse a network connection?

ping

Which of the following commands will send 4 ICMP echo requests to a remote host named server1 to determine the round trip time it takes a packet to travel?

ping -c 4 server1

Which of the following commands can be used to terminate a process by the process name?

pkill

While the top command is running, what key can be pressed to change the nice value of a process?

r

Which of the following commands will install an RPM package while ignoring any other packages that it may be dependent upon for proper operation?

rpm -ivh --nodeps package.rpm

Which of the following commands will show the current runlevel along with the previous runlevel? (Choose all that apply.)

runlevel

Which of the following hashing algorithm commands reduces the chances of collisions due to the bit length of the message digest?

sha256sum

Which of the following two commands can be used to add custom log file entries to the journald database? (Choose two.)

system-cat logger

Which of the following commands can be used to display socket information out to the terminal screen?

ss

Which of the following commands will allow the root user to switch to another user account without having to enter that user account's password?

su

Which of the following commands allows a standard user to execute a single command as root without actually switching to the root account?

sudo

Which of the following commands will set the default runlevel of a Linux system?

systemctl set-default runlevel5.target

Which of the following commands will display a list of Systemd units sorted by the time they took to load?

systemd-analyze blame

Which of the following options for the tar command will create an archive that is also gzipped while displaying all of the work in progress to the terminal screen?

tar -czvf

Which of the following commands will shut down a Linux system? (Choose all that apply.)

telinit 0 shutdown -h now poweroff

If a system appears to be having issues with performance for read and write operations to a hard disk, which of the following is not a valid scheduling method that you could try to improve performance?

testwr

Which of the following commands will list the time zones available on a Linux system?

timedatectl list-timezones

Which of the following options can be specified in the GRUB Legacy configuration file to set how long the boot menu is displayed before loading the default image?

timeout

Which of the following commands can be used to delete a user account?

userdel

Which of the following commands can be used to schedule very frequent recurring tasks, such as running once every minute?

watch

Which of the following can be used at the command line to download a file using the HTTP protocol? (Choose two.)

wget curl

Which of the following is a special group that provides its members with the ability to run the su and sudo commands?

wheel

What command can be used to display the contents of a file that was compressed with the compress utility?

zcat

Which of the following states describe a process that is waiting for a parent process to release its PID?

zombie

The SUSE and openSUSE Linux distributions use an alternative to yum but that provides the same functionality. What is the name of the command they use?

zypper

You currently have a Linux system configured to check the /etc/hosts file before trying to contact a DNS server to resolve host names. You want to reverse the configuration so that it checks with a DNS server before falling back to the /etc/hosts file. Which of the following files should you modify to make this possible?

/etc/nsswitch.conf

What command is used to display the lineage of a process by tracing its PPIDs until the init daemon?

pstree

Which of the following options for the gpg command will attempt to use the gpg agent and if it cannot will ask for a passphrase?

--use-agent

Which of the following options for the iptables command will delete all rules for all chains?

-F

What option can be added to the dpkg command to remove a specified package from the system, including any configuration files used by the package?

-P

Which of the following Debian Package Management commands will install the newest versions of all packages that are currently installed on a system?

apt-get upgrade

A system administrator wants to schedule a task to run at 11 pm, but knows that she will not be in the office at that time. Which of the following commands can she use to schedule this task to run that night while she is at home?

at

Which of the following commands will display a list of the pending jobs to be run? (Choose all that apply.)

at -l atq at -q

Which of the following command can be used to remove a job from the list of pending jobs? (Choose all that apply.)

atrm at -r at -d

Which of the following will show account aging information for a user such as the date of the last password change, when the password expires, and the number of days of warning before the password expires?

chage -I jsmith

Which of the following commands will change the SELinux security context of a file?

chcon

Which of the following is the log file where the Debian Package Manager writes entries for actions taken and packages installed?

dpkg.log

Which of the following log files contains information and error messages generated by the Linux kernel?

kern.log

Chapter 8 Which of the following will invalid entries in the GRUB2 configuration cause?

kernel panic and halt the system

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

When experiencing a network issue, you want to determine where the source of the problem is. Which of the three following commands can be used to determine whether there is an issue with a router in the normal route that the packets are attempting to take?

mtr traceroute tracepath

Which of the following commands will allow an administrator to edit the list of permissions assigned to a user wanting to run the sudo command?

visudo