tut 2

Question 1

touch test.txt

Answer 1

creates a file called “test.txt”

Question 2

man ls

Answer 2

shows all the ls commands

Question 3

ls -a or ls -a -1

Answer 3

shows all the hidden entries (files)

Question 4

ls -1

Answer 4

lists down all the files in a single line/single entry

Question 5

ls -1 | wc -l

Answer 5

shows all the files in the directory

Question 6

ls -1a | wc -l

Answer 6

shows all the files + the hidden files in the directory.

Question 7

ls -a1R

Answer 7

shows all the content in the sub directories also

Question 8

mkdir -newdir

Answer 8

makes a new directory

Question 9

mkdir -newdir
touch -file1
ls

Answer 9

creates a new file called “file1” under “newdir” and ls lets us see the new file under the new directory.

Question 10

mkdir -newdir
touch -file1
ls
echo “hello world”&raquo_space; file1
cat file1

Answer 10

output: hello world

this script creates a new file in the new directory and adds in a sentence called “hello world”, using the cat command helps us to see the content in file1.

Question 11

cp file1 file2

Answer 11

copies content from file1 to file2

Question 12

mv file1 file3
ls

Answer 12

output: file2 file 3
(ls replaces the file1 with file3)

Question 13

mv file3 ..

Answer 13

file 3 is moved to the parent directory, as known as desktop (moves 1 level up)

Question 14

mv file3 ..
ls
ls /home/ict246/Desktop
OR
ls ~/Desktop
OR
ls ..

Answer 14

ls just shows the list of files in the current directory, so the output is file2

the last command tells us the list of files in the Desktop so file3 is included in the list of files.

Question 15

mv ../file3
ls

Answer 15

this moves file3 from the desktop to the current directory user is working in.

output: file2 file3

Question 16

cd ..

Answer 16

helps us to get out of the new directory we added recently and brings us back to the desktop directory we were originally working in.

Question 17

rmdir new-dir

Answer 17

helps to remove the directory “new-dir”. if the directory cant be removed it is because there are still files inside that “new-dir”

Question 18

rm -r new-dir/

Answer 18

removes the directory and the files inside immediately and its irreversible.

Question 19

touch a{1..5}

Answer 19

adds in filea1, filea2, … filea5 in the current directory.

Question 20

ls *

Answer 20

shows all the files in the current directory, and lists down the sub directories in a single line, similar to ls -1

Question 21

ls a*

Answer 21

shows all the files that starts with “a”

Question 22

ls *a

Answer 22

shows the files that start with “aa”

Question 23

ls e

Answer 23

shows all the files and subdirectories that contain the letter “e”

Question 24

ls ?e*

Answer 24

shows all the files that contain only 1 single character of letter “e”.

Question 25

cd ~
pwd

Answer 25

brings us back to the home folder.
shows us that we are in the home folder, output: /home/ict246

Question 26

cd /tmp

Answer 26

to change from the current folder to the /tmp folder

Question 27

do section 3 and 4 of tut 2