Linux Commands

Question 1

cat filename

Answer 1

prints contents of file to screen

Question 2

grep searchterm filename

Answer 2

search file for search term

Question 3

sort filename

Answer 3

sort file alphabetically

Question 4

sort -r filename

Answer 4

sort file z-a

Question 5

uniq filename

Answer 5

removes duplicates that are beside each other

Question 6

awk ‘{print $1, $2}’ filename

Answer 6

print column 1 and 2 of file

Question 7

awk ‘{print $1, “eats”, $2}’ filename

Answer 7

prints column 1 and 2 with eats between them

Question 8

wc filename

Answer 8

counts words in file

Question 9

wc -l filename

Answer 9

counts number of lines in a file

Question 10

pwd

Answer 10

prints pathway to folder

Question 11

ls

Answer 11

prints contents of file your in

Question 12

cd foldername

Answer 12

move into folder

Question 13

cd ..

Answer 13

go back a folder

Question 14

sort file > sorted_file.txt

Answer 14

create new file called sorted_file and save contents there

Question 15

sort file&raquo_space; sorted_file.txt

Answer 15

add the sorted contents of the file to the end of sorted file

Question 16

cat file1 file2 > file3

Answer 16

joins file1 and file2 and puts contents into new file called file3

Question 17

cp file1 file2

Answer 17

copy contents of file1 to file2

Question 18

mkdir name

Answer 18

make a new folder called name

Question 19

rm file

Answer 19

remove file

Question 20

*

Answer 20

means all files in same directory

Question 21

rm*

Answer 21

removes all files

Question 22

ls*

Answer 22

lists all files

Question 23

ls temp*

Answer 23

lists all files starting with temp

Question 24

sort -n file

Answer 24

sort file in numerical order

Question 25

uniq -c

Answer 25

tells you how many times a line repeated