ITN 170 Midterm
Select the regular expression metacharacter that matches 0 or more occurrences of the previous character. * ? + ^
*
Which of the following key combinations, commonly used in the vi editor command mode, displays current line statistics? $ x Crl+g P
Crl+g
When using the vi text editor, which of the following keys, when in command mode, will move to the last line in the document? G L P W
G
Which of the following commands should you use to specify that you want to use Git for version tracking on them? git version git track git add git new
git add
Which of the following can be used to show the block devices on a Linux system? (Choose two.) ls /sys/block cat /proc/block lsblk ls /etc/block
ls /sys/block, lsblk
Which of the following commands can be used to show the block devices, including their major and minor numbers, on a system which are located in the /sys/block directory? lsblk cat /sys/block ls -al /sys/block lsblock
lsblk
Which of the following commands can be used to display general hardware information for the entire system? lshw lscpu hwdisp hware
lshw
A government office wants to secure a few of its Linux systems so that they can only use certain USB devices. After plugging in a USB device, which of the following commands could be used to detect certain identifying information that can be used to only allow that type of USB device? usbdetect modusb lspci lsusb
lsusb
When issuing the ls -F command, what special character indicates a linked file? @ * & =
@
The iptables software on Linux is an example of what kind of software? Routing Anti-virus Firewall Proxy
Firewall
What software type is distributed free of charge, but the source code is not available? Open source software Shareware Closed source software Freeware
Freeware
What directory under / contains the log files and spools for a Linux system? /boot /usr /opt /var
/var
Which of the following umask settings will result in new files receiving the default permissions -rw-------? 0177 0600 0188 0688
0177
Match the file with the order in which the BASH shell environment files are read:
1. /etc/profile 2. /etc/profile.d/* 3. /etc/bashrc 4. ~/.bashrc
Which of the following represents stderr at the command line when used for redirection? 0 1 2 3
2
When using the vi text editor, which of the following keys, when in command mode, will change to insert mode and place the cursor at the end of the current line? i a I A
A
What two Linux distributions utilize the Debian package manager by default? Red Hat Linux SUSE Linux Linux Mint Ubuntu Linux
Linux Mint, Ubuntu Linux
Which of the following would be a term applicable to an e-mail program on a workstation that is used to view email? MTA MDA MUA MBR
MUA
Aria has modified the hard disk that hosts the operating system by using the fdisk command. The fdisk command indicates that the new partition information must be manually reloaded. Which of the following should she do next? (Choose two. Either answer is independently correct.) Run the parted command Run the partprobe command Run the cfdisk program Reboot the system
Run the partprobe command, Reboot the system
Which of the following types of encryption uses a pair of keys known as a public and private? symmetric asymmetric SHA1 hashing message digest
asymmetric
Which of the following can be included in a shell script to ask the user to type in a password and then store it in the variable named $password? read -s -p "Please enter the password: " password read -p "Please enter the password: " $password read -p -s "Please enter the password: " password read -s -p "Please enter the password: " $password
read -s -p "Please enter the password: " password
Which of the following server roles does Apache perform? web server mail server name server certificate authority
web server
Which file should be configured so that quotas are enabled at boot time? /etc/edquota /etc/quotas /etc/fstab /etc/fsq
/etc/fstab
Lynn runs the locate command and the results include many files from a directory that she doesn't want to include in her search. Which of the following files could Lynn modify so that the locate command no longer includes those results? /etc/locate.d/updatedb.conf /etc/locate.conf /etc/updatedb.conf /etc/locatedb.conf
/etc/updatedb.conf
Which of the following directories is created by default when an ext2, ext3, or ext4 filesystem is created on a device that is used by the fsck utility? /var/crash/ /var/tmp/ /lost+found/ /proc/tmp/
/lost+found/
The Filesystem Hierarchy Standard specifies what directory as the root user's home directory? /bin /home/root /boot /root
/root
Under the root directory in Linux, which directory contains system commands and utilities? /opt /var /boot /usr
/usr
What is the complete path and filename for the database that is used by the locate and mlocate commands? /var/lib/mlocate/mlocate.db /var/lib/locate/locate.db /etc/mlocate.db /etc/locate/mlocate.db
/var/lib/mlocate/mlocate.db
If the physical extent of a volume group is set to 32MB, what is the maximum logical volume size? 256GB 512GB 1TB 2TB
2TB
Jan needs to set permissions on a file so that the owner has read, write, and execute permissions. The group should have read permissions only, and everyone else should have no access. Which of the following parameters, when used with the chmod command, would set the permissions described? 047 740 026 620
740
At the vi command mode prompt, what key combination will force a quit from the vi editor without saving changes? :q :q! :exit :!
:q!
What metacharacter can be used to issue two commands to be run in consecutive order, without piping or redirecting output? \ & ; |
;
Which of the following are true of the echo command? When used to display text, quotation marks are optional. It can be used to display shell variables by including a $ sign in front of the variable name. Including a semicolon at the end of the line will not affect the text being displayed. All of the other options are true.
All of the other options are true.
What piece of software tells the operating system how to use a specific hardware device? Graphical user interface System service Device driver User interface
Device driver
What service provides a method for the efficient transfer of files over the Internet? FTP HTML SMTP Telnet
FTP
The mutt software is an example of what type of mail service software on Linux? Mail Transfer Agent Mail Delivery Agent Mail User Agent Mail Transport Agent
Mail User Agent
When using command-line terminal, specific letters that start with a dash ("-") and appear after command names are considered to be: Arguments Options Keywords Metacharacters
Options
What Linux distribution is the most commonly used distribution within organizations today? Mandrake SuSE Debian Red Hat
Red Hat
Which of the following types of cloud platforms would a webmail service offered to the general public be considered? SaaS PaaS IaaS MaaS
SaaS
What would be the result of running the command chown :root file1.txt This would set the owner of file1.txt to root. This would set the group ownership of file1 to root. This would set the owner and group ownership of file1 to root. This would keep the current ownership of the file, and add root as a second owner of the file.
This would set the group ownership of file1 to root.
In Linux, the core component of the GUI is known as: GNOME KDE X Windows Red Hat
X Windows
Which of the following commands can be used to display the filesystem and partition UUIDs on a Linux system? e2label blkid fatlabel showpart
blkid
A calendar for the current month can be shown on the command line by issuing which command? date cal w id
cal
Which of these commands will set the following permissions on file1.txt? User = Read, Write, Execute Group = Read, Execute Others = Read chmod o=rwx,g=rx,u=r file1.txt chmod u=rwx, g=rx, u=r file1.txt chmod 754 file1.txt chmod file1.txt 754
chmod u=rwx, g=rx, u=r file1.txt, chmod 754 file1.txt
The United States Air Force was able to install Linux on a popular gaming console and then connect over 1,700 of these systems together to work as one big supercomputer. Which of the following types of technologies did they implement? herding cloud computing group computing clustering
clustering
Kate wants to compare two text files to identify what might have been changed from one version to another. Which of the following commands can she use to do this? match document1.txt document2.txt version --compare document1.txt document2.txt compare document1.txt document2.txt diff document1.txt document2.txt
diff document1.txt document2.txt
Which of the following are valid permissions for a directory where the command chmod 1777 has been used to set the permissions on it? drwxrwxrwt Srwxrwxrwx trwxrwxrwx drwxrwxrw-
drwxrwxrwt
Which of the following commands when run from the /, or root, directory will return a very long list of many pages of results? fdisk --list ls -al df du
du
The quotas for certain users can be edited by using which command? edquota chquota usrquota repquota
edquota
After a shell is no longer needed, what command can be given to exit the shell? exit stop reset quit
exit
If the mkfs command is executed to create a filesystem and only the block device name is specified, which of the following filesystems will be created? exFAT ext2 ext3 ext4
ext2
What command is most effective at identifying different types of files? stat ls -l ll file
file
Which of the following commands can be used to recursively search a directory tree for files that meet a certain criterion without using a database or premade index of files? locate find where search
find
Which of the following commands will display all files and directories within the /var/log directory or its subdirectories which are owned by the root user? find /var/log -user root find -uid root -print /var/log find -user root -print /var/log find -path /var/log -user root
find /var/log -user root
Which of the following terms describes a type of useful and legitimate software that is distributed by a developer where they do not charge for the software but also do not distribute the source code along with it? shareware freeware malware tryware
freeware
What command can be used to check different kinds of filesystems on Linux for errors? chkdsk fs_check errorchk fsck
fsck
What argument can be used with the chmod command to add read permission and remove write permission for a group on a file? u+r+w g-r+w g+r-w o+r-w
g+r-w
Which of the following commands will prompt to convert an MBR partition to GPT, thus destroying all existing MBR partitions on a disk? gdisk cfdisk gfdisk iconv
gdisk
Garrett wants to search through a csv file to find all rows that have either the name John or Bob in them and display them out to the terminal. Which of the following commands could Garrett use to perform this search? grep -E "(John|Bob)" salesemployees.csv grep (John|Bob) salesemployees.csv grep -E (John|Bob) salesemployees.csv egrep (John|Bob) salesemployees.csv
grep -E "(John|Bob)" salesemployees.csv
Jo has received a text file which contains multiple instances of his name spelled correctly as well as multiple instances spelled as Joe. Which of the following commands would search a text file for any occurrences of either spelling and display them out to the terminal? (Choose three.) grep "Joe?" document1.txt grep -E "Joe?" document1.txt grep "Joe*" document1.txt grep -E "Joe*" document1.txt
grep -E "Joe?" document1.txt, grep "Joe*" document1.txt grep -E "Joe*" document1.txt
Which of the following commands will not interpret regular expressions, which translates into faster results being returned? (Choose all that apply.) grep grep -F egrep fgrep
grep -F, fgrep
Which of the following commands will create a symbolic link named foo.txt to an original file named bar.txt ln bar.txt foo.txt ln foo.txt bar.txt ln -s bar.txt foo.txt ln -h foo.txt bar.txt
ln -s bar.txt foo.txt
Which of the following permissions would show for a symbolic link when displayed with the ls -l command? -rw-r--r-- srwxrwxrwx lrwxrwxrwx srw-r--r--
lrwxrwxrwx
Wayne is using the command line and is in his home directory. Which of the following will display a list of all files and their sizes from his home directory? (Choose two.) ls -ax ls -al ~ ls -ax ~ ls -al /home/wayne
ls -al ~, ls -al /home/wayne
Nicholas wants to verify whether a file is a hard link to a file within the same directory. Which of the following commands could he use to see information that would be helpful to make this determination? ls -s ls -l ls -al ls -i
ls -i
Jamie has created a hard link to another file within the same directory. Which of the following commands can he use to verify that the hard link was created correctly? (Choose all that apply.) ls -il ls -i ls -l ls -al
ls -il, ls -i
Select the command that can be used to provide a long listing for each file in a directory: ls -T ls -L ls -F ls -l
ls -l
The apropos list command produces the same results as which command below? man -j list man -k list man -l list man -m list
man -k list
Dustin runs a command at the command line trying to find out what kernel version the system is running. However, it doesn't give him the information he needs. He knows there is an option that can be used to display the kernel version. How can he find out which option to use? ver --help help version man uname lsproc -?
man uname
Select the utility below that will start and perform a thorough check of RAM for hardware errors when run. memcheck68 memtest86 fixram fsck
memtest86
Mindy wants to create a new subdirectory at ~/2019projects/projectx/projectplans to start storing the initial project plans for projectx. However, this is the first project she has worked on in 2019 and the 2019projects directory does not exist yet. Which of the following commands will create the higher level directories if they do not already exist? mkdir -r ~/2019projects/project/projectplans mkdir -p ~/2019projects/project/projectplans mkdir --all ~/2019projects/project/projectplans mkdir -v ~/2019projects/project/projectplans
mkdir -p ~/2019projects/project/projectplans
Mike has changed directory into one subdirectory after the next and has lost track of where he's at in the directory tree. Which of the following commands can he use to tell him the full path to the current subdirectory he is in? cd - pwd cwd ls -dir
pwd
What command can be issued to confirm which directory you are in at a command line prompt? dir pwd whereami ld
pwd
Which of the following commands can be used to scan a filesystem for disk usage, create, check, and repair quota files? quota edquota chkquota quotacheck
quotacheck
What command can be used to display the last five lines of a text file? end -5 head -5 stop -5 tail -5
tail -5
Which of the following commands can be used to update the last modified timestamp on a file, or if the file specified does not exist will create the file? update file.txt updatets file.txt touch file.txt stamp file.txt
touch file.txt
The Linux kernel exists as a file named: vmlinuz vmlinux kernel.0 krn.linux
vmlinuz
Which Linux command can be utilized to display your current login name? who whoami id w
whoami
Archie wants to optimize an XFS filesystem and minimize the chance of future corruption. Which of the following commands will compact or otherwise improve the layout of the contiguous blocks of file data for an XFS filesystem? defrag xfs_fsr fsck xfs_db
xfs_fsr
Which of the following characters can be entered at the beginning of a line in a shell script to ensure that line is recognized as a comment rather than try to execute it? $ > % #
#
What metacharacter indicates background command execution? @ ^ & !
&
Which of the following options will change the ownership of files and directories recursively within a directory? (Choose all that apply.) -r -R --recursive --follow
-R, --recursive
Which of the following commands can be used to create a BASH variable named CREATOR with the value of Torvalds? CREATOR="Torvalds" set $CREATOR = "Torvalds" CREATOR = "Torvalds" var CREATOR as "Torvalds"
CREATOR="Torvalds"
Which of the following is the greatest expense for companies using Linux? Additional software Operating system cost Hiring people to maintain the Linux system Software upgrades
Hiring people to maintain the Linux system
When viewing the version number for a Linux kernel, what number indicates the stability of the kernel? Major number Revision number Minor number Production kernel number
Minor number
Which of the following can be used to synchronize the time between a number of Linux servers and workstations on a network with a time clock source on the Internet? SFTP IMAP SMTP NTP
NTP
Proxy servers keep track of the information passed to each client by maintaining what type of table? Firewall Routing Network Address Translation (NAT) Caching
Network Address Translation (NAT)
If a Linux installation ends abnormally and the screen displays a fatal signal 11 error, what type of error has occurred? Page fault IRQ fault Segmentation fault RAM failure
Segmentation fault
What is the term for a ZFS managed filesystem that is created from ZFS pools? ZFS store ZFS vault ZFS volume ZFS lake
ZFS volume
Which of the following is the common escape sequence to display a horizontal tab using the echo command? \tab ?tab \t %tab
\t
Levi wants to run 5 commands sequentially, but does not want to create a shell script. He knows that each command is going to take approximately 20 minutes to run individually. However, he would like to go to lunch 15 minutes from now. He knows that he can type all of the commands on the same line and separate them with a certain character to run them sequentially. Which character can he type after each command to have them run one after the next without requiring further input from him? a comma a colon a semicolon a pound sign
a semicolon
Which command can be used to create a new command that will monitor the contents of auth.log as they get added to the file? create showauth='tail -f /var/log/auth.log' alias showauth='tail -f /var/log/auth.log' new showauth as 'cat -f /var/log/auth.log' ln showauth='tail -f /var/log/auth.log'
alias showauth='tail -f /var/log/auth.log'
Callie wants to make sure that a filesystem is checked every 20 days. Which of the following options, when used with the tune2fs command, would set a full filesystem check to run every 14 days? -i 14 -i 14d -d 14 -i 336
-i 14d
Which of the following can be used for comparing values within an if statement? (Choose two.) -lt -neq = -grt
-lt, =
Which of the following files can you add filenames to so that the git add * command will not stage them? .gitignore .gitnopush .ignore .nopush
.gitignore
Sandra needs to obtain the latest image of Fedora so that she can install it as a virtual machine on her Windows workstation. Which of the following file formats is Sandra likely to find available for download from Fedora's website in order to allow her to use the file as the source for booting and installing Linux as a VM? .zip .tar.gz .iso .tgz
.iso
Which of the following is required as a separate partition in order to use LVM? /var /boot /tmp /home
/boot
Which of the following would be the device file for the third partition on the second SATA drive on a Linux system? /dev/hdb3 /dev/hdc2 /dev/sdb3 /dev/sdc2
/dev/sdb3
Jackson wants to automatically mount a secondary internal hard drive when his Linux workstation boots up. In which of the following files should he configure an entry for the partition on the drive that he wants to mount? /etc/ftab /etc/crontab /etc/mtab /etc/fstab
/etc/fstab
What file in the /proc directory contains information about a computer's CPU? /proc/proc_info /proc/cpuinfo /proc/meminfo /proc/cpu_info
/proc/cpuinfo
To ensure that Linux has detected the correct amount of RAM in the system after installation, you should view the contents of what file in the proc directory? /proc/mem /proc/cpuinfo /proc/meoryinfo /proc/meminfo
/proc/meminfo
Which of the following will take output from a command and append it to the end of a file? < << > >>
>>
Which of the following can be used to mount a filesystem? (Choose all that apply.) A device path such as /dev/sdb2 A filesystem UUID A filesystem label A filesystem nickname configured in /etc/mtab
A device path such as /dev/sdb2, A filesystem UUID, A filesystem label
After logging into a terminal, a user will receive an interface known as which option? Processor User interface Swap memory Shell
Shell
If enough unique letters of a directory name have been typed, what key can be pressed to activate the BASH shell's completion feature? Alt Tab Ctrl Esc
Tab
An archive of files that usually contain scripts that install the software contents to the correct location on the system is referred to as a: Router Package manager DBMS Tarball
Tarball
Each SCSI device attached to a system must be assigned an ID number. What is this ID number called? Device ID Target ID SCSI number SCSI controller
Target ID
If a hard link is created to a file and then the original file is deleted, which of the following is true? Both the original file and the hard link are removed. An error message will be displayed preventing the deletion of the original file. The original file will be removed while the hard link remains, though the content will not be accessible. The original file will be removed while the hard link remains usable to access the contents of the file.
The original file will be removed while the hard link remains usable to access the contents of the file.
Which of the following results would be created by the command sequence: echo 'apple banana carrot dog elephant' | while read a b c; do echo result: $c $b $a; done elephant dog carrot apple banana carrot dog elephant carrot dog elephant banana apple carrot dog elephant apple banana
carrot dog elephant banana apple
Which of the following commands will send the output of the cat command to the grep command to be filtered? cat /etc/passwd | grep jsmith cat /etc/passwd > grep jsmith cat /etc/passwd >> grep jsmith cat /etc/passwd @ grep jsmith
cat /etc/passwd | grep jsmith
Which of the following commands will display the current CPU(s) detected by a Linux system? cat /sys/cpuinfo cat /proc/cpuinfo cat /etc/cpu.conf cat /var/log/boothw.log
cat /proc/cpuinfo
Chase is trying to extract records for employees 423 through 428 out of a comma separated values file and store them in another one. Which of the following commands would accomplish this? (Choose all that apply.) cat employees.csv | grep 423,424,425,426,427,428 > employees.csv cat employees.csv | grep "42[3-8]" > employees-newhires.csv grep "42[3-8]" employees.csv > employees-newhires.csv grep "42[3-8]" < employees.csv > employees-newhires.csv
cat employees.csv | grep "42[3-8]" > employees-newhires.csv, grep "42[3-8]" employees.csv > employees-newhires.csv, grep "42[3-8]" < employees.csv > employees-newhires.csv
In order to move from the /home/joe/test/data to the /home/joe directory, what command should be issued? cd .. cd ../.. /home/joe cd ./..
cd ../..
In order to set all of the special permissions on a certain file or directory, which command should be used on a file named filename? chmod 777 filename chmod 7777 filename chmod 6666 filename chmod 0000 filename
chmod 7777 filename
Select the command that can be used to change the root filesystem to a different directory, such as when you are in a rescue environment. change_root chroot set_root croot
chroot
Which of the following commands can be used to recursively search through the directory tree in search of a file that meets a set of given criteria instead of using an indexed database? locate mlocate find where
find
Which command should you run after installing a new kernel module to update the module dependency database? insmod modprobe lsmod depmod
depmod
Which of the following commands will display messages that were displayed during the boot sequence by the kernel? kdis kernlog messages dmesg
dmesg
Which of the following commands will display the exit status of the last command used in the BASH shell? echo $status echo $exit echo $? echo $!
echo $?
You have just created a variable named CREATOR. Which of the following commands will display the contents of the variable to standard output? echo $CREATOR print CREATOR echo CREATOR disp $CREATOR
echo $CREATOR
Which command can be used to download an updated copy of the master branch from the original Git repository? git pull origin master git pull original master git pull master original git pull master origin
git pull origin master
Which of the following will look at the /etc/passwd file for any lines containing the word root and display them out to the screen while simultaneously writing the results to a file? cat /etc/passwd | grep root | merge ~/root.txt cat /etc/passwd | grep root >> ~/root.txt grep root /etc/passwd | tee ~/root.txt grep root /etc/passwd | split ~/root.txt
grep root /etc/passwd | tee ~/root.txt
Which of the following is a type of software that allows a piece of hardware to host multiple operating systems? guest operating system thick client thin client hypervisor
hypervisor
Which of the following constructs can be used in a shell script to determine whether two values are equal and if so run another set of commands? when where if comp
if
What file in the /proc directory contains a list of memory address ranges reserved for device use? meminfo ioports iomem misc
ioports
In Fedora 20, what journaling database system has replaced the logging system used to record the messages normally stored within the boot.log, messages, and syslog files? systemd messaged logd journald
journald
In order to create and manage KVM or Qemu virtual machines, a Linux system must have which of the following installed? libvm virsh vmlib libvert
libvert
What command is used to manage a software RAID configuration after installation? mdadm mdraid vgadm pgadm
mdadm
Which of the following commands can be used to create and manage a software RAID configuration after installation? mdadm raidadm dmadm madam
mdadm
The subdirectory newdir does not currently exist in the current directory that you are in. Which of the following commands will create a new directory named newdir and then change into that directory? (Choose two.) mkdir newdir || cd newdir mkdir newdir; cd newdir mkdir newdir && cd newdir mkdir newdir >> cd newdir
mkdir newdir; cd newdir, mkdir newdir && cd newdir
Which of the following commands cannot be used to create an exFAT filesystem on a USB thumb drive that is recognized as /dev/sdb? mkfs.exfat /dev/sdb1 mkfs exfat /dev/sdb1 mkexfatfs /dev/sdb1 mke2fs.exfat /dev/sdb1
mkfs exfat /dev/sdb1
Which of the following commands can be used to create and activate a swap partition on a Linux system? (Each answer represents part of the whole.) makeswap /dev/sda6 mkswap /dev/sda6 mkeswap /dev/sda6 mke2swap /dev/sda6 mke2swap -on /dev/sda6 mkswap -on /dev/sda6 swapon /dev/sda6
mkswap /dev/sda6, swapon /dev/sda6
Leonard wants to find detailed information about the Bluetooth kernel module. Which of the following commands can he use to display this information? modstatus bluetooth lsmod bluetooth modinfo bluetooth modstat bluetooth
modinfo bluetooth
What file under the proc directory contains information regarding what modules are currently loaded into the Linux kernel? modinfo kmods mod_info modules
modules
Jim wants to rename a directory for a project that he has been working on. Which of the following commands can he use to perform that action? mv projectx projecty rename projectx projecty ren projectx projecty move projectx projecty
mv projectx projecty
Which of the following commands will display the output of a file while also displaying a line number at the left side of each line for the /etc/passwd file? numbers /etc/passwd wc -l /etc/passwd nl /etc/passwd ln /etc/passwd
nl /etc/passwd
Which of the following virsh commands will display the total amount of memory as well as the amount of free memory for a node? nodesh nodemem nodememstats showmem
nodememstats
Clint has run the command parted /dev/sdb and wants to display a list of the existing partitions that exist on that drive. Which of the following commands can he use to display the existing partitions? disp list print display
Which of the following types of servers can be used to cache requested Internet resources so that they can be more quickly delivered to users requesting the same resource while at the same time reducing the burden on the external network connection to the Internet for an organization? file server DNS server proxy server DHCP server
proxy server
Which of the following commands will display a summarization of quotas for a filesystem? quota --list repquota quotadisplay quotaprint
repquota
Which of the following commands will delete a directory and all of the files contained within it? (Choose all that apply.) rm olddir rmdir olddir rm -rf olddir rmdir -rf olddir
rm -rf olddir
Which of the following commands will count down from 10 to 1? seq 10 1 seq 10 -1 seq 10 -1 1 seq 10 1 -1
seq 10 -1 1
Which of the following commands will display the contents of the /etc/passwd file in alphanumerical order? cat --sort /etc/passwd cat -s /etc/passwd sed /etc/passwd sort /etc/passwd
sort /etc/passwd
Which of the following is a valid method of running a script named myscript.sh? (Choose two) source myscript.sh run myscript.sh exec ./myscript.sh ./myscript.sh
source myscript.sh, ./myscript.sh
Which of the following is a virtual filesystem that is made up of virtual files that a Linux operating system is able to export information to about kernel sub-systems, hardware devices, and device drivers to make it easy for users to access the information? tmpfs sysfs procfs varfs
sysfs
To display a text file in reverse order, what command should be used? cat tac tee sed
tac
Elijah is done working with an external USB hard drive and wants to properly disconnect it. Which of the following commands should he use before unplugging the USB cable? unmount disable umount mount --eject
umount
John has been using the cdrom on his computer that is running the Linux operating system. He pushes the eject button on the front of the drive, but it doesn't eject the disk. Which of the following commands should he run? (Choose all that apply.) unmount /media/cdrom umount /media/cdrom eject /media/cdrom detach /media/cdrom
umount /media/cdrom, eject /media/cdrom
An alias has previously been created named showauth. Which of the following commands can be used to get rid of that alias? alias -d showauth ualias shoauth noalias showauth unalias showauth
unalias showauth
How many times will the following loop execute as part of a script: #!/bin/bash COUNTER=0 while [ $COUNTER -lt 7 ] do echo "hello world" done 0 1 7 until ctrl-c is used to terminate it
until ctrl-c is used to terminate it
Jean installs a distribution of Linux on a workstation and attempts to run the locate command to find a certain file. Instead of returning the results she expected, an error message is displayed that it cannot find the mlocate.db file in its default location. Which of the following commands should Jean run in an attempt to resolve this problem? apt upgrade mlocate updatedb locate --update mlocate --update
updatedb
On a system using the KVM hypervisor, which of the following modules would you expect to see as part of the output of the lsmod command on a guest Linux virtual machine? hv_ virtio vmw hyperv_
virtio
Which of the following commands will count the number of lines in a file named data.csv? lc data.csv wc -l data.csv lines data.csv count -l data.csv
wc -l data.csv
Which of the following commands will return one result of where the grep binary executable is located? (Choose two.) which grep locate grep type grep find grep
which grep type grep
