Topic4: Devices, Linux Filesystems, Filesystems Hierarchy Standards (90)

Question 1

Westminster Road

Question 2

1. Attic

umask value will result in default access permissions of 600 (rw——) for files and 700 (rwx——–) for directories

Answer 2

0077

077

Question 3

2. Attic Fan

cmd unmount /mnt with error message. umount: /mnt: device is busy

Answer 3

user has a file open in /mnt directory

Question 4

3. Stairs

cmd used to modify quota settings

Answer 4

edquota

Question 5

4. 2nd floor landing

following cmds will mount an already inserted CDROM in /dev/sr0 onto an existing directory /mnt/cdrom when issued with root priv

Answer 5

mount -t cdrom /dev/sr0 /mnt/cdrom

Question 6

5. Back stairs to first floor

in compliance with FHS what directories are doc files found

Answer 6

/var/share/doc

Question 7

6. 2nd FLoor Bathroom Shower

common linux cmds for file management

Answer 7

mv

cp

mkdir

Question 8

7. 2nd Floor Bathroom Closet

cmd display inode usege of each mounted filesystem

Answer 8

df -i

Question 9

8. 2nd floor Bathroom Window

cmd shows all libraries required by binary executable or another shared library

Answer 9

ldd

Question 10

9. 2nd Floor Bathroom Toilet

SysV init config file used to set default run level

Answer 10

inittab

Question 11

10. 2nd floor bathroom Mirror

instead of supplying explicit device in /etc/fstab for mounting, what other options may be used to id the intended partition

Answer 11

LABEL

UUID

Question 12

11. 2nd floor Bathroom door

option must be passed to a filesystems entry in /etc/fstab in order to mount the file system without root priveleges

Answer 12

user

Question 13

12. Christine’s Room Dresser

cmd will change CR-LF pairs in an imported text file, userlist.txt to linux standard LF characters and store it as newlist.txt

Answer 13

tr -d ‘\r’ < userlist.txt > newlist.txt

Question 14

13. Christine’s Bookshelf

normal mode in VI what char can be used to begin a reverse search

Answer 14

?

Question 15

14. Christine’s Window

chown cmd will change ownership to dave and the group to staff on a file named data.txt

Answer 15

chown dave:staff data.txt

Question 16

15. Christine’s Bed

what does mount -a do

Answer 16

mounts all filesystems listed in /etc/fstab that have option auto set.

Question 17

16. Christine’s Door

vi editor what cmd will copy (but not paste) from current line at the cursor and the following 16 lines (17 lines total).

Answer 17

17yy

Question 18

17. My Room Dresser

cmd shows definition of given shell cmd

Answer 18

type

Question 19

18. My Bed

process ID number of init process on a SysV init based system

Answer 19

1

Question 20

19. My WIndow 1

cmd used to search executable file foo when it has been placed in a directory not included in $PATH

Answer 20

find

Question 21

20. My Window 2

cmd print working directory in bash shell

Answer 21

pwd

Question 22

21, My Desk

FHS where should binaries that have been compiled by sys admin be placed in order to be made available to all users on the system

Answer 22

/usr/local/bin

Question 23

22. My Book Case

cmd changes ownership of file.txt to the user dan and the group staff

Answer 23

chown dan:staff file.txt

Question 24

23. My Closet

describes a difference between GHU GRUB Legacy and GRUB 2

Answer 24

Partition numbers start at 0 in GRUP Legacy and 1 in GRUB 2

Question 25

24. My Door cmd used to create an initialize the files used to store quota info

Answer 25

quotacheck

Question 26

25 2nd floor Bannister whats true about hard linked files

Answer 26

SAME permissions and owner inode filesystem

Question 27

26. Dad's Master Bedroom Standing Dresser cmd used to query info about available packages on Debian system

Answer 27

apt-cache

Question 28

27. Dad's Master Bathroom Scrolltop Desk list of files that would be installed by RPM package file apache-xml.rpm be previewed

Answer 28

rpm -qpl apache-xml.rpm

Question 29

28. Dad's Master Bathroom Window filesystem preallocates fixed number of inodes at the filesystem's make/creation time and does NOT generate them as needed

Answer 29

ext2 ext3

Question 30

29. Dad's Master Bedroom Bedside Table L info of existing file is changed when hard link pointing to that file is created

Answer 30

Link count

Question 31

30. Dad'd Master Bedroom Bed Headboard cmd creates ext3 filesystem on /dev/sdb1

Answer 31

/sbin/mke2fs -j /dev/sdb1 /sbin/mkfs -t ext3 /dev/sdb1

Question 32

31. Dad's Master Bedroom Bed partition type used for linux swap spaces when partitioning hard disk space

Answer 32

83

Question 33

32. Dad's Master Bedroom Bedside Table R cmd will print important system information such as kernel version and machine hardware architecture

Answer 33

uname

Question 34

33. Dad's Master Bedroom Right side Window cmd prints a list of available package updates when using RPM based pkg management

Answer 34

dpkg check-update

Question 35

34. Dad's Master Bedroom Walk-in Closet cmd reads and displays contents of Kernel Ring Buffer on the cmd line

Answer 35

dmesg

Question 36

35 Dad's Master Bedroom Bathroom multi jet shower cmd creates swap space or block device or a file

Answer 36

mkswap

Question 37

36. Dad's Master Bedroom Bathroom toilet option to the tee cmd will cause the output to be concat on the end of the output file instead of overwriting the existing file contents

Answer 37

-a

Question 38

37. Dad's Master Bedroom Bathroom window file permissions belong to symbolic link

Answer 38

lrwxrwxrwx

Question 39

38. Dad's Master Bedroom Bathroom Mirror limitation of cut cmd

Answer 39

cannot reorder fields

Question 40

40. Dad's Master Bedroom Bathroom sink filesystems used on Linux root partitions

Answer 40

ext3 swap

Question 41

41. Dad's Master Bedroom Door cmd changes all occurrences of the word "bob" in file data to "Bob" and prints the result to standard output

Answer 41

sed 's/bob/Bob/g' data

Question 42

42. 2nd Floor Main Staircase cmd will change quota for specific user

Answer 42

edquota

Question 43

43. 1st landing floor step when piping the output of find to xargs cmd when option to find is useful if the filenames have spaces in them

Answer 43

-print0

Question 44

44. Living Room fireplace examples for bash flle globbing matches a file named root-can-do-this.txt when used in the directory holding that file

Answer 44

root*can?do-this.{txt,odt} r[oOoO]t-can-do*.txt {root,user,admin}-can-??-this.txt

Question 45

45. Living Room tapestry produce following output

Answer 45

ps

Question 46

46. Living Room side table L cmd load kernel module along with any required dependency

Answer 46

modprobe

Question 47

47. Living Room couch what does cmd mount -a do

Answer 47

ensures that all file systems listed with the option auto in /etc/fstab are mounted

Question 48

48. Living Room Big WIndow behind couch describe boot order

Answer 48

BIOS, bootloader, kernel, init system

Question 49

49. Living Room side table R how is symbolic link called bar.conf pointing to foo.conf created

Answer 49

ln -s foo.conf bar.conf

Question 50

50. Door to Porch file in /proc describes IRQs that are used by various kernel drivers

Answer 50

interrupts

Question 51

51. Porch Couch cmd updates already installed RPM pckage rpmname

Answer 51

rpm -U rpmname

Question 52

52. Porch Desk creating hard link to an ordinary file returns and error - what would be the reason

Answer 52

Source and target on different filesystems

Question 53

53. Porch TV how many fields are in syntactically correct line of /etc/fstab

Answer 53

6

Question 54

53. Porch WIndow cmds used to change metadata and options for ext3 filesystem

Answer 54

tune2fs

Question 55

54. Living Room Pub Set what does the cmd grub-install /dev/sda do

Answer 55

GRUB installs all required files and configures the boot loader on device/dev/sda

Question 56

55. Living Room Chair 1 cmd sets stickybit

Answer 56

chmod +t /tmp chmod 1775 /tmp

Question 57

56. Living Room Chair 2 cmd makes already defined variable TEST visible to new child processes

Answer 57

export TEST

Question 58

57 Living Room Bookcase 1 settins for umask ensures that new files have default permissions rw-r------

Answer 58

0027

Question 59

58. Living Room Bookcase 2 apt-get cmd will install newest version of all currently installed packages

Answer 59

dist-upgrade

Question 60

59. Living Room Stereo Cabinet what is true about command ending with a & character

Answer 60

command is run in background of the current shell

Question 61

60. Living Room TV file from /proc file system contains a list of all currently mounted devices

Answer 61

mounts

Question 62

61 Living Room Step Up to Kitchen Landing cmd converts spaces in a file to tab characters and prints the result to std output

Answer 62

unexpand

Question 63

62. Breakfast Nook Table cmd changes number of days before the ext3 filesystem on /dev/sda1 has run through a full filesystem check while booting

Answer 63

tune2fs -i 200 /dev/sda1

Question 64

63. Breakfast Nook Fish Tank utility would be used to change how often a filesystem check is performed on ex2 filesystem without losing any data stored on that filesystem

Answer 64

tune2fs

Question 65

64. Breakfast Nook Phone command lines create or in case it already exists, overwrites a file called data with output of ls

Answer 65

ls > data

Question 66

65. 1st floor Bathroom toilet signal sent by kill cmd by default

Answer 66

SIGTERM(15)

Question 67

66. 1st floor Bathroom sink program updates database that is used by locate command

Answer 67

updatedb

Question 68

67. 1st floor Bathroom Cabinet cmd instructs SysVinit to reload its config file

Answer 68

telinit q

Question 69

68. Side door to outside device file name for second partition on the only SCSI rive

Answer 69

/dev/sda2

Question 70

69. Kitchen Refrigeratior cmd used to locate programs and their corresponding man pages and config files

Answer 70

whereis

Question 71

70. Kitchen Oven cmd can be used to create new files that is 100kB in size

Answer 71

dd

Question 72

71. Kitchen Window cmd changes the nice level of running process

Answer 72

renice

Question 73

72. Kitchen Sink using reg expression which of the following characters match the beginning of a line

Answer 73

^

Question 74

73. Kitchen Toaster Oven cmd makes /bin/foo executable by everyone but writeable only by its owner

Answer 74

chmod u=rwx,go=rx /bin/foo

Question 75

74. Kitchen Countertop permissions and ownership should the file /etc/passwd have

Answer 75

-re-r--r--1 rootroot531 Jun 5 22:45 /etc/passwd

Question 76

75 Kitchen Pantry when choosing a partition scheme what directories could be considered for separate partitioins

Answer 76

/home

Question 77

76 Dining Room Side Table cmd will uninstall package but leave its config files in case the package is reinstalled

Answer 77

dpkg -r pkgname

Question 78

77 Dining Room Table modes of vi editor

Answer 78

mode insert command

Question 79

78 Dining Room Chandileir pressing Crl-C combo on keyboard will a cmd is executing in the foreground sends this signal code

Answer 79

2(SIGINT)

Question 80

79 Dining Room Window purpos of FHS

Answer 80

distribution neutral description of locations of files and directories

Question 81

80 Dining Room Bar Where does BIOS search for bootloader

Answer 81

on all connected storage media in the defined device boot order

Question 82

81. Vestibule Coat Closet purpose of xargs

Answer 82

reads standard input and builds up cmd lines to execute

Question 83

82. Front Door cmd enables setuid (suid) permissions on executable /bin/foo

Answer 83

chmod 4755 /bin/foo

Question 84

83. Front Steps sys config file named_____ commonly used to set the default runlevel

Answer 84

/etc/inittab

Question 85

84. cobblestone path cmd used to display inode number of given file

Answer 85

ls

Question 86

85. Sidewalk moving data to new filesystem how can former path of data be kept intact in order to avoid reconfiguration of existing applications

Answer 86

by creating symbolic link from the old to the new path of the data by mounting the new filesystem on the original path of the data

Question 87

86. Driveway type of filesystem created by mkfs when it is executed with the block device name only and without any additional parameters

Answer 87

ext2

Question 88

87. Side Porch in bash inserting 2>$1 after a command redirects

Answer 88

standard output to standard error