In Linux operating system: When writing shell scripts, we rely on the echo command to display output and prompt users for input. We know that the echo command will display exactly what we type on the command line unless we specify otherwise.  What would be the command and option we would use to display what shell we are running followed by two newlines?

You will develop a client side and a Servlet program that will work with a database. 1. The client (front end) should have a title "NJIT Credit Union", centered. 2. The client should have a background color. 3. The client should have a text field with label 'UserID' where user will enter userID (integer) and a Submit button with text "Submit". 4. An unsuccessful authentication should have a message printed on the screen, in red, stating that "Your authentication has failed, please try again.” (no pop up message). At this point the text field should get cleared and ready to accept a new input. Your program should not exit. 5. A successful authentication should be followed by a message on the screen, in green, stating that "Your authentication is successful" (no pop up message). 6. There should be two other text boxes with label "Deposit" and "Withdraw" where user will enter an amount (you should accommodate for decimals). These two text boxes should only be enabled after successful…

UNIX Systems Programming   A snippet from a shell script is given below:line1 ... while read numline2 ...doline3 ...w[$i]=$numline4 ...i=$((i+1))line5 ...done < $1line6 ...echo ${w[*]}line7 ...echo ${#w[*]}If the numbers entered by the user are 1 3 5 7 9 <Ctrl-D> on separate lines :2a. What is printed (echo’ed) by the line 6 ? Answer:__________________________________________2b. What is printed (echo’ed) by the line 7 ? Answer:

A user belongs to a group that has all permissions on a file named linux.txt, but the user, as the owner of the file, has no permissions.   Describe which operations, if any, the user/owner can perform on linux.txt.   Which command can the user/owner give that will grant the user/owner all permissions on the file?