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LPIC1MemoryPalace > Topic4: Devices, Linux Filesystems, Filesystems Hierarchy Standards (90) > Flashcards

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

1
Q

Westminster Road

A
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2
Q
  1. Attic

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

A

0077

077

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3
Q
  1. Attic Fan

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

A

user has a file open in /mnt directory

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4
Q
  1. Stairs

cmd used to modify quota settings

A

edquota

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5
Q
  1. 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

A

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

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6
Q
  1. Back stairs to first floor

in compliance with FHS what directories are doc files found

A

/var/share/doc

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7
Q
  1. 2nd FLoor Bathroom Shower

common linux cmds for file management

A

mv

cp

mkdir

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8
Q
  1. 2nd Floor Bathroom Closet

cmd display inode usege of each mounted filesystem

A

df -i

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9
Q
  1. 2nd floor Bathroom Window

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

A

ldd

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10
Q
  1. 2nd Floor Bathroom Toilet

SysV init config file used to set default run level

A

inittab

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11
Q
  1. 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

A

LABEL

UUID

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12
Q
  1. 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

A

user

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13
Q
  1. 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

A

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

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14
Q
  1. Christine’s Bookshelf

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

A

?

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15
Q
  1. Christine’s Window

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

A

chown dave:staff data.txt

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16
Q
  1. Christine’s Bed

what does mount -a do

A

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

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17
Q
  1. 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).

A

17yy

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18
Q
  1. My Room Dresser

cmd shows definition of given shell cmd

A

type

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19
Q
  1. My Bed

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

A

1

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20
Q
  1. My WIndow 1

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

A

find

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21
Q
  1. My Window 2

cmd print working directory in bash shell

A

pwd

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22
Q

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

A

/usr/local/bin

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23
Q
  1. My Book Case

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

A

chown dan:staff file.txt

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24
Q
  1. My Closet

describes a difference between GHU GRUB Legacy and GRUB 2

A

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

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25
Q
  1. My Door

cmd used to create an initialize the files used to store quota info

A

quotacheck

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26
Q

25 2nd floor Bannister

whats true about hard linked files

A

SAME
permissions and owner

inode

 filesystem
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27
Q
  1. Dad’s Master Bedroom Standing Dresser

cmd used to query info about available packages on Debian system

A

apt-cache

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28
Q
  1. Dad’s Master Bathroom Scrolltop Desk

list of files that would be installed by RPM package file apache-xml.rpm be previewed

A

rpm -qpl apache-xml.rpm

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29
Q
  1. 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

A

ext2

ext3

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30
Q
  1. Dad’s Master Bedroom Bedside Table L

info of existing file is changed when hard link pointing to that file is created

A

Link count

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31
Q
  1. Dad’d Master Bedroom Bed Headboard

cmd creates ext3 filesystem on /dev/sdb1

A

/sbin/mke2fs -j /dev/sdb1

/sbin/mkfs -t ext3 /dev/sdb1

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32
Q
  1. Dad’s Master Bedroom Bed

partition type used for linux swap spaces when partitioning hard disk space

A

83

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33
Q
  1. Dad’s Master Bedroom Bedside Table R

cmd will print important system information such as kernel version and machine hardware architecture

A

uname

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34
Q
  1. Dad’s Master Bedroom Right side Window

cmd prints a list of available package updates when using RPM based pkg management

A

dpkg check-update

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35
Q
  1. Dad’s Master Bedroom Walk-in Closet

cmd reads and displays contents of Kernel Ring Buffer on the cmd line

A

dmesg

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36
Q

35 Dad’s Master Bedroom Bathroom multi jet shower

cmd creates swap space or block device or a file

A

mkswap

37
Q
  1. 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

A

-a

38
Q
  1. Dad’s Master Bedroom Bathroom window

file permissions belong to symbolic link

A

lrwxrwxrwx

39
Q
  1. Dad’s Master Bedroom Bathroom Mirror

limitation of cut cmd

A

cannot reorder fields

40
Q
  1. Dad’s Master Bedroom Bathroom sink

filesystems used on Linux root partitions

A

ext3

swap

41
Q
  1. 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

A

sed ‘s/bob/Bob/g’ data

42
Q
  1. 2nd Floor Main Staircase

cmd will change quota for specific user

A

edquota

43
Q
  1. 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

A

-print0

44
Q
  1. 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

A

root*can?do-this.{txt,odt}

r[oOoO]t-can-do*.txt

{root,user,admin}-can-??-this.txt

45
Q
  1. Living Room tapestry

produce following output

A

ps

46
Q
  1. Living Room side table L

cmd load kernel module along with any required dependency

A

modprobe

47
Q
  1. Living Room couch

what does cmd mount -a do

A

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

48
Q
  1. Living Room Big WIndow behind couch

describe boot order

A

BIOS, bootloader, kernel, init system

49
Q
  1. Living Room side table R

how is symbolic link called bar.conf pointing to foo.conf created

A

ln -s foo.conf bar.conf

50
Q
  1. Door to Porch

file in /proc describes IRQs that are used by various kernel drivers

A

interrupts

51
Q
  1. Porch Couch

cmd updates already installed RPM pckage rpmname

A

rpm -U rpmname

52
Q
  1. Porch Desk

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

A

Source and target on different filesystems

53
Q
  1. Porch TV

how many fields are in syntactically correct line of /etc/fstab

A

6

54
Q
  1. Porch WIndow

cmds used to change metadata and options for ext3 filesystem

A

tune2fs

55
Q
  1. Living Room Pub Set

what does the cmd grub-install /dev/sda do

A

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

56
Q
  1. Living Room Chair 1

cmd sets stickybit

A

chmod +t /tmp

chmod 1775 /tmp

57
Q
  1. Living Room Chair 2

cmd makes already defined variable TEST visible to new child processes

A

export TEST

58
Q

57 Living Room Bookcase 1

settins for umask ensures that new files have default permissions rw-r——

A

0027

59
Q
  1. Living Room Bookcase 2

apt-get cmd will install newest version of all currently installed packages

A

dist-upgrade

60
Q
  1. Living Room Stereo Cabinet

what is true about command ending with a & character

A

command is run in background of the current shell

61
Q
  1. Living Room TV

file from /proc file system contains a list of all currently mounted devices

A

mounts

62
Q

61 Living Room Step Up to Kitchen Landing

cmd converts spaces in a file to tab characters and prints the result to std output

A

unexpand

63
Q
  1. Breakfast Nook Table

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

A

tune2fs -i 200 /dev/sda1

64
Q
  1. 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

A

tune2fs

65
Q
  1. Breakfast Nook Phone

command lines create or in case it already exists, overwrites a file called data with output of ls

A

ls > data

66
Q
  1. 1st floor Bathroom toilet

signal sent by kill cmd by default

A

SIGTERM(15)

67
Q
  1. 1st floor Bathroom sink

program updates database that is used by locate command

A

updatedb

68
Q
  1. 1st floor Bathroom Cabinet

cmd instructs SysVinit to reload its config file

A

telinit q

69
Q
  1. Side door to outside

device file name for second partition on the only SCSI rive

A

/dev/sda2

70
Q
  1. Kitchen Refrigeratior

cmd used to locate programs and their corresponding man pages and config files

A

whereis

71
Q
  1. Kitchen Oven

cmd can be used to create new files that is 100kB in size

A

dd

72
Q
  1. Kitchen Window

cmd changes the nice level of running process

A

renice

73
Q
  1. Kitchen Sink

using reg expression which of the following characters match the beginning of a line

A
74
Q
  1. Kitchen Toaster Oven

cmd makes /bin/foo executable by everyone but writeable only by its owner

A

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

75
Q
  1. Kitchen Countertop

permissions and ownership should the file /etc/passwd have

A

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

76
Q

75 Kitchen Pantry

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

A

/home

77
Q

76 Dining Room Side Table

cmd will uninstall package but leave its config files in case the package is reinstalled

A

dpkg -r pkgname

78
Q

77 Dining Room Table

modes of vi editor

A

mode
insert

command

79
Q

78 Dining Room Chandileir

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

A

2(SIGINT)

80
Q

79 Dining Room Window

purpos of FHS

A

distribution neutral description of locations of files and directories

81
Q

80 Dining Room Bar

Where does BIOS search for bootloader

A

on all connected storage media in the defined device boot order

82
Q
  1. Vestibule Coat Closet

purpose of xargs

A

reads standard input and builds up cmd lines to execute

83
Q
  1. Front Door

cmd enables setuid (suid) permissions on executable /bin/foo

A

chmod 4755 /bin/foo

84
Q
  1. Front Steps

sys config file named_____ commonly used to set the default runlevel

A

/etc/inittab

85
Q
  1. cobblestone path

cmd used to display inode number of given file

A

ls

86
Q
  1. Sidewalk

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

A

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

87
Q
  1. Driveway

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

A

ext2

88
Q
  1. Side Porch

in bash inserting 2>$1 after a command redirects

A

standard output to standard error

LPIC1MemoryPalace (5 decks)

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