Unix Commands

Front 1

exit

Back 1

Terminates the current shell

Front 2

logout

Back 2

Informs the shell you want to end the login session

Front 3

cd Dir

Back 3

Changes the working directory to Dir

Front 4

cd

Back 4

Changes the current directory to the user's home directory

Front 5

ls

Back 5

Lists the contents of the current directory

Front 6

mkdir Dir

Back 6

Creates a directory named Dir

Front 7

pwd

Back 7

Displays the full pathname of the current directory

Front 8

history

Back 8

Outputs a list of previously entered command lines

Front 9

!!

Back 9

Reexecutes the most recent command line (csh, tcsh, and bash)

Front 10

!##

Back 10

Reexecutes the command number ##

Front 11

!xxx

Back 11

Reexecutes the last command that begins with xxx

Front 12

alias newname command

Back 12

Tells shells to interpret newname as command

Front 13

SPACEBAR

Back 13

Advance one screen

Front 14

ENTER

Back 14

Advance one line

Front 15

b

Back 15

Go back toward the top of the file one screen

Front 16

/xxx

Back 16

Go forward to the first target (xxx) and display the page

Front 17

n

Back 17

Go to the next target (xxx)

Front 18

q

Back 18

Quit more

Front 19

cat file1

Back 19

Outputs file1 from beginning to end. Useful for small files

Front 20

head filename

Back 20

Displays the first 10 lines of filename

Front 21

tail filename

Back 21

Displays the last 10 lines of filename

Front 22

wc filename

Back 22

Counts the lines, words and characters in filename

Front 23

cp file1 file2

Back 23

Copies file1 to file2

Front 24

mv file1 file2

Back 24

Renames file1 as file2

Front 25

rm filename

Back 25

Deletes filename

Front 26

rm -i filename

Back 26

Deletes filename, but asks the user to confirm the deletion

Front 27

spell filename

Back 27

Checks the spelling in filename

Front 28

who

Back 28

displays a list of users currently logged on

Front 29

lp filename

Back 29

Prints filename on the line printer

Front 30

lpr filename

Back 30

Prints filename on the line printer

Front 31

utility > filename

Back 31

Sends the output of the utility to the file filename

Front 32

utility >> filename

Back 32

Appends the output of the utility to the file filename

Front 33

utility1 | utility2

Back 33

Makes the output of utility1 the input of utility 2

Front 34

man utility

Back 34

Displays manual entry for the utility listed as an argument

Front 35

man -k word(s)

Back 35

Displays all lines in the table of contents contaning any word listed in word(s)

Front 36

vi filename

Back 36

Instructs shell to start vi and pass one argument, filename, which vi interprets as a file to open if it exists in the current directory, or to create if it does not already exist.

Front 37

hjkl

Back 37

Moves the cursor one space or line left, down, up, or right, respectively

Front 38

0 (zero)

Back 38

Moves the cursor to the beginning of whatever line it is on.

Front 39

^ (caret)

Back 39

Like zero, it moves the cursor to the beginning of the current line.

Front 40

$

Back 40

Moves the cursor to the end of the line.

Front 41

##G

Back 41

Moves the cursor to the line specified by the number in front of the G, for example 42G move the cursor to line 42 in the file

Front 42

G

Back 42

Moves the cursor to the last line of the file.

Front 43

w

Back 43

Moves the cursor forward to the first letter of the next word.

Front 44

e

Back 44

Moves the cursor forward to the next end of a word. (If the cursor is in a word, the next end is the end of the current word. If the cursor is at the end of a word, the next end is the end of the next word.)

Front 45

b

Back 45

Moves the cursor backward to the previous beginning of a word. If the cursor is in a word, the previous beginning is the beginning of the current word.

Front 46

12|

Back 46

Positions the cursor at column 12 of the current line.

Front 47

L

Back 47

Positions the cursor at the lowest line displayed on the screen.

Front 48

M

Back 48

Positions the cursor at the midpoint on the screen.

Front 49

H

Back 49

Positions the cursor at the highest line on the screen.

Front 50

''

Back 50

Two single quotes. Moves the cursor to its previous location in the file.

Front 51

fb

Back 51

Moves the cursor forward on the line to the next b (or to any other specified character)

Front 52

/word

Back 52

Moves the cursor forward through the text to the next instance of word.

Front 53

n

Back 53

Moves to the next instance of the pattern identified in a previously issued /word

Front 54

CTRL-D

Back 54

Scrolls the cursor down a block of text in a file.

Front 55

CTRL-U

Back 55

Scrolls the cursor up a block of text in a file.

Front 56

CTRL-F

Back 56

Displays the next screenful of text in a file.

Front 57

CTRL-B

Back 57

Displays the previous screenful of text in a file.

Front 58

:set number

Back 58

Instructs the editor to include line numbers as part of the screen display, not as part of the file itself. The abbreviated form of :set nu also works.

Front 59

:set nonumber

Back 59

Removes line numbers from your screen. You can also use :set nonu

Front 60

:set ignorecase

Back 60

Instructs editor to search for targets, ignoring the case of the characters

Front 61

:set

Back 61

Shows you all the options you have set.

Front 62

:set all

Back 62

Shows you all the set options available

Front 63

dd

Back 63

Deletes the line of text on which the cursor is positioned.

Front 64

#dd

Back 64

Deletes # number of lines of text

Front 65

dw

Back 65

Deletes one word from the text.

Front 66

#dw

Back 66

Deletes # number of words from the text.

Front 67

x

Back 67

Deletes the one character under the cursor