Question

Write a Bash script clock.sh that once/second will print the time in the 24-hour clock format HH:MM:SS. See "man date" for a command to produce this format of time.

rubric

clock.sh prints h:m:s in 24-hour clock format

clock.sh prints time 1/second

Answer 1

clock.sh prints h:m:s in 24-hour clock format

Answer :

Step 1: First Create file clock.sh

Step 2 : chmod +x clock.sh (Change permission for executable)

Step 3: Open the file clock.sh and copy below thing

#date +"%H:%M:%S" ,specifies the format to display only hours minutes and seconds 
date +"%H:%M:%S"
 

Step 4: Save the file

Step 5: Open the terminal and run below command in terminal

./clock.sh

Step 6: For exit from the program type Cntrl+D

Output :

clock.sh prints time 1/second

Answer :

Step 1: First Create file clock.sh

Step 2 : chmod +x clock.sh (Change permission for executable)

Step 3: Open the file clock.sh and copy below thing

#infinite loop
while true; do
#assigninig the value to the date variable
#date +"%H:%M:%S" ,specifies the format to display only hours minutes and seconds 
 date=$(date +"%H:%M:%S")
 #printing the variable to the terminal
 echo $date
 #put thread to sleep for 1 sec
 sleep 1
done

Step 4: Save the file

Step 5:Open the terminal and run below command in terminal

./clock.sh

Step 6: For exit from the program type Cntrl+D

Output :

Let me know if you need any help :)