Cit330 - Exam 2 - Chapter 5

Front 1

FHS

Back 1

Filesystem Hierarchy Standard

Front 2

mount

Back 2

To mount a file system, enter the command mount, specifying the device file and the directory to which the file ssystem should be mounted

Front 3

mount point

Back 3

the directory to which a device is mounted / only the user root can mount and unmount directories

Front 4

umount

Back 4

A file system can be removed again with the command umount

Front 5

library

Back 5

specific functions that are also used by other programs / Stored in the /lib/ directory

Front 6

fstab

Back 6

"File system table" is a file in /etc/ that holds a table of all disks and partitions and shows how each are intialized

Front 7

mtab

Back 7

mount command shows the exact same thing / shows the file systems which are currently mounted

Front 8

files

Back 8

normal files / refer to the files as they are also known to other operating systems: a set of contiguous data addressed with one name

Front 9

directories

Back 9

special files that are used to organize other files on the filesystem

Front 10

device files

Back 10

a file used to identify hardware devices such as hard disks and serial ports

Front 11

links

Back 11

files that point to other files on the filesystem

Front 12

sockets

Back 12

named pipes connecting processes on two different computers; they can also be represented by files on the filesystem

Front 13

FIFO

Back 13

FIRST IN FIRST OUT - named pipes are also caled FIFO files / named pipes are temporary connections that send info one one command or process in memory to another

Front 14

ls

Back 14

lists the specified files in a directory

Front 15

cd

Back 15

changes the directory

Front 16

pwd

Back 16

"print working directory" displays the path of the current directory

Front 17

touch

Back 17

changes the time stamp of a file or creates a new file with a size of 0 bytes

Front 18

cat

Back 18

view the contents of a file

Front 19

less

Back 19

view the contents of a file by page / compress files can also be viewed

Front 20

head

Back 20

view only the first few lines of a file / default 10

Front 21

tail

Back 21

viewthe last few lines of a file / default is 10 / use -f to see continuous

Front 22

mv

Back 22

used to move one or more files to another directory

Front 23

cp

Back 23

copy files and directories

Front 24

mkdir

Back 24

create a new directory / use -p to create a complete path

Front 25

rmdir

Back 25

deleted a direcotry or set of directories / directories must be empty first

Front 26

rm

Back 26

can deleted a single file or delete all files in a directory / using -r option will delete the directory

Front 27

ln

Back 27

creates a link to reference a file

Front 28

KFind

Back 28

a program that can be started in Konqueror for find a file

Front 29

find

Back 29

very powerful finding command / file path criteria action /used often with grep

Front 30

locate

Back 30

an alternative to 'find -name' / a much faster way of searching because a special database

Front 31

whereis

Back 31

retruns the binaries -b, manual pages -m, and the source code -s of a specified command

Front 32

which

Back 32

searches all paths listed in the variable PATH for the specified command and returns the full path of the command

Front 33

type

Back 33

used find out what kind of command is executed when the command is entered - a shell built-in command or an external command

Front 34

grep

Back 34

used to search files for certain patterns using the syntax 'grep search_pattern filename'

Front 35

regular expression

Back 35

strings consisting of metacharacters and literals(regular characters and numerals)

Front 36

ark

Back 36

lets you collect multiple files or even entire directories into an archieve / used for backing up data / preparing data to be sent via email

Front 37

tar

Back 37

tape archiver' / most commonly used tool for data backup / uses file name .tar.gz or .tgz

Front 38

gzip

Back 38

used to compress data / 'gzip options_file'

Front 39

gunzip

Back 39

decompresses a file compressed with gzip and removes the suffix .gz

Front 40

bzip2

Back 40

compresses files / usually twenty to thirty perecent smaller than the files compressed with gzip

Front 41

bunzip2

Back 41

decompresses files compressed with bzip2 and removes the suffix bz2.

Front 42

zcat

Back 42

decompresses files compressed with gzip and writes them to the standard output / the compressed file is not modified

Front 43

cpio

Back 43

copies files into or out of a cpio or tar archieve / 3 modes

Front 44

rsync

Back 44

remote synchronization' - creates copies of complete directories across a network to a different computer

Front 45

dd

Back 45

converts and copies files byte-wise / 'dd if=/etc/protocols of=protocols.org

Front 46

mt

Back 46

lets you work with magnetic tapes

Front 47

cron

Back 47

automate backup from the command line

Front 48

crontab

Back 48

used to schedule commands using the cron service

Front 49

zcat

Back 49

used to view the contents of text files that have been compressed with gzip