Topic2: Linux Installation and Package management Flashcards by Mike McCollum

Woodhaven Road

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Woodhaven Attic Shelves

cmd used to update the list of available packages when using dpkg based package management

apt-get update

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Attic Right Window

Top level system directory is used for files and data that change regularly while the system is running and are to be kept between reboots

/var/

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3: Attic Middle Window

command updates the linker cache of shared libraries

ldconfig

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4: Attic Shell Window

function key is used to start Safe Mode in WIndows NT

Windows NT does not support Safe Mode

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5: Attic Middle Window

diff between –remove and –purge action with dpkg cmd

–remove removes the program –purge also removes the config files

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6: Attic Organ

command will disable swapping on a device

swapoff

/sbin/swapoff

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7: Attic Organ Bench

option to the yum command will update the entire system

update, upgrade

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8: Attic Ledge behind Organ

What can Logical Volume Manager (LVM) be used for

dynamically change the size of logical volumes

create snapshots

dynamically create or delete logical volumes

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9: Attic Ledge facing futon

When speaking about mount points

every existing directory can be used as a mount point.

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10: Attic Futon

in which directory must definition files be placed to add additional repositories to yum

/etc/yum.repos.d/

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11: Attic Side Window

Which of the following commands can be used to download RPM package kernel without installing it

yumdownloader kernel

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12: Attic Hole in wall

command lists all currently installed packages when using RPM package management

rpm –query –all

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13: Attic choo choo train

admin issued following cmd

grub-install –root-directory=/custom-grub /dev/sda

in which directory will new config files be found

/custom-grub/boot/grub

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14: Attic Bathroom Sink

world-writeable directory should be placed on a separate partition in order to prevent users from being able to fill up / filesystem

/tmp

/var/tmp

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15: Attic Bathroom Cabinet

what apt-get command will install the newest versions of all currently installed packages without removing any packages or installing new packages that are not already installed.

upgrade

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16: Attic Bathroom Toilet

when removing a package when dpkg option will completely remove the files including configuration files

–purge

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17: Attic Bathroom Shower

what command lists the dependencies of a given dpkg package

apt-cache depends package

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18: Attic Ledge Facing Bathroom

main config file for GNU GRUB

menu.lst

grub.conf

grub.cfg

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19: Attic Stairs

what file should be edited to select the network location from which Debian installation package files are loaded

/etc/apt/sources.list

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20: Attic Door to Second Floor

Debian package management tool asks the config questions for a specific already installed package just as if the package were being installed for the first time.

dpkg-reconfigure

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21: Second Floor Landing

cmd overwrites the bootloader located on /dev/sda without overwriting the partition table or any data following it

dd if=/dev/zero of=/dev/sda bs=440 count=1

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22: Conor’s Closet

dpkg-_____ cmd will ask config questions for a specified package just as if the package were being installed for the first time

dpkg-reconfigure

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23: Conor’s Bed

you want to preview where package file, apacke-xml.i386.rpm will install before installing it - what command do you issue

rpm -qpl apache-xml.i386.rpm

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24: Conor's Window cmd can be used to perform a full text search on all available packages on a Debian system

apt-cache

25: Conor's Mirrors after modifying GNU GRUB's config file which cmd must be run for changes to take effect

no action required.

26: Conor's Dresser option used in GRUB Legacy config file to define the amount of time that GRUB menu will be shown to the user

timeout

27: Conor's Shelves what environment variable will you assign or append a value if you need to tell the dynamic linker to look in a build directory for some of a program's shared libraries

LD_LIBRARY_PATH

28: Conor's Door what RPM command will output the name of the package that supplied the file /etc/exports

rpm -qf /etc/exports

29: Landing Outside Conor's Room Which of the following environment variables overrides or extends the list of directories holding shared libraries

LD_LIBRARY_PATH

30: Mick's Dresser when using rpm --verify to check files created during the installation of RPM packages what is taken into consideration

Timestamps MD5 checksums File sizes

32: Michael's Closet effect of the egrep command when using the -v option

it only outputs non-matching lines

33: Michael's Bed in compliance with the FHS, in which directories are man pages found

/usr/share/man

34: Michael R Window file in user home directory used to store Bash history

.bash_history

35: Michael Center Window Bash env var defines in which file the user history is stored when the user history is stored when exiting a Bash process

HISTFILE

36: Michaels Toy Chest user accidentally created subdirectory \dir in his home directory. Which of the following commands will remove the directory?

rmdir ~/\\dir

37: Michael's L Window signal sent to a process when the key combination CTRL+C is pressed on the keyboard

SIGINT

38: Michael's Beanbag #1 vi editor how can commands such as moving the cursor or copying lines into the buffer be issued multiple times or applied to multiple rows

by specifying the number right in front of a command such as 4l or 2yj.

39: Michael's Beanbag #2 Which grep command will print only the lines that do not ed with a / in the file foo.

grep -v '/$' foo

40: Michael's Door commands that can be used to determine how long the system has been running

uptime top

41: landing outside Michael's door which characters can be combined with a separator string in order to read from the current input source until the separator string, that is on a separate line and without and trailing spaces is reached

42: Master Bedroom Chest of Drawers cmd will NOT update the modify timestamp on the file /tmp/myfile.txt

file /tmp/myfile.txt

42: Master Bedroom Mirrors which commands replace each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newsletter

sed 's/bob/Bob/g' letter > newsletter

43: Master Bedroom Ikea Dresser # 1 What does the + symbol mean in the following grep regular expression grep '^d[aei]\+d$' /usr/share/dict/words

Match the preceeding character set ([aei]) one or more times

44: Master Bedroom Ikea Dresser # 2 vi editor which cmd will copy the current line into the vi buffer

45: Master Bedroom Ikea Dresser # 3 In Bash, inserting 1>&2 after a cmd redirects

standard output to standard error

46: Master Bedroom L Window what command can be used to create a USB storaage media from a disk image

47: Master Bedroom L nightstand which of the following commands prints all files and directories within the /tmp directory or its subdirectories that are also owned by the user root

find /tmp -user root -print find /tmp -user root

48: Master Bedroom L Lamp Command that determines the type of file by using a definition database file that contains information about all common file types

file

49: Master Bedroom Bed default nice level when a process is started using the nice command

50. Master bedroom r side table editing in vi and file changed due to another process. without exiting vi how can the file be reopened for editing with the new content

51. R master master bedroom window regarding nice -5 /usr/bin/prog what is the current nice level

52. Master bedroom linen closet cmd searches down a particular number of subdirectories

-maxdepth

53. Master bathroom bathtub max niceness level a regular user can assign to a process with the nice command when executing a new process

53. Master bath skylight vi editor save opened document and exits the editor

esc ZZ esc :wq!

54, Master bath shower what is true about cmd foo 1> bar

stdout from cmd foo overwrites file bar

55. Master bath toilet character added to end of a cmd runs that cmd in background as a child process of current shell

56. Master bath sink # 1 valid reason to run a command in the background of your shell

cmd has to be run immediately but the user needs to log out

57. Master bath Mirror # 1 purpose of bash built in export cmd

sets up env vars for apps

58. Master bath Sink #2 cmd will print last 10 lines of a text file to standard output

tail -n 10 filename

59. Master bath Mirror #2 commands is used to change options and positional parameters

set

60. Master Closet Shelves diff between i and a cmds in vi

i (insert) inserts text BEFORE the current cursor position a (append) inserts text AFTER the cursor

61. Master Closet Back Wall cmd moves and resumes in background that last stopped shell job

62. Master Closet Clothing Rack for sed -e "s/a/b" /tmp/file > /tmp/file why is the /tmp/file empty afterwards

When the shell establishes the redirection it OVERWRITES the target file before the redirected cmd starts and opens it for reading

63. Master Bedroom Dresser when starting a program with nice cmd without any additional params which nice level is set for the resulting process

64. Master Bedroom Mirror cmd prints a list of username (first column) and their primary group (fourth column) from the /etc/passwd file

cut -d : -f 1,4 /etc/passwd

65. Master Bedroom Door

66. Landing outside Master Bedroom

67. 2nd Floor Bathroom sink

68. 2nd Floor Bathroom Toilet

69. 2nd Floor Bathroom Bath

70. 2nd Floor Shower

72. 2nd Floor Bathroom Door

73. Landing Outside 2nd Floor Bathroom

74.