Module 1

Question 1

ls /
ls -l

Answer 1

list contents of directory
- list -l = gives more details of directory items

Question 2

cd

Answer 2

change directory

Question 3

tab

Answer 3

autofill command or name

Question 4

pwd

Answer 4

Print Name of Working Directory

Question 5

mkdir

Answer 5

make new directory

Question 6

mkdir -p

Answer 6

create necessary parent directories
- eg. mkdir -p testparent/testkid = testkid within testparent directory

Question 7

cd ../

Answer 7

move up one directory per ../

Question 8

rm /
rm -r

Answer 8

• rm = remove file
• rm -r = remove directory (recursive)

CANNOT BE UNDONE

Question 9

rwx

Answer 9

read (read only)
write (write only)
execute (run the file)

Question 10

rwx
octal permission values

Answer 10

• none = 0
• read = 4
• write= 2
• execute = 1

Question 11

touch

Answer 11

create new file

Question 12

head /
head -n integer

Answer 12

outputs first 10 lines of text
- option -n : specify number of lines to output
- eg. head -n 5 = first 5 lines

Question 13

tail /
tail -n integer

Answer 13

outputs last 10 lines of text

• option -n: specify number of lines to output
• eg. tail -n 5 = last 5 lines

Question 14

grep

Answer 14

searches files for matching patterns
- eg. grep “the” poems.txt

Question 15

cd ~/directory name

Answer 15

changes to named directory from home directory

Question 16

chmod

Answer 16

changes permission mode string (eg. rwx)