Purpose: The purpose of this assignment is to use concepts $/$ features of the Bourne Shell.

$*$ The first line of your script must contain the following:

#$!/$bin$/$bash

$1.$ Create a directory with the name lab$5$ in your home directory.

$2.$ Use the file $/$home$/$david$/$lab$5/$lab$5.$scr as a template to create a menu interface for simple commands.

Copy the file $/$home$/$david$/$lab$5/$lab$5.$scr into your lab$5$ directory and make appropriate changes to the script.

The menu interface should contain the following choices.

A$.$ Execute the command that will display a calendar for the year $2020$ and December $2019$

B$.$ Execute the ping command four times to test the Network Connection for the hostname vbitbus.tcc$.$edu.

Bonus $+10$:

Determine if the Secure Shell LISTENER is running.

C$.$ Execute the command that will display information on disk usage for the directory $/$home$/$david$/$lab$5.$

Use the option that displays SUMMARY information only.

D$.$ Execute the command that displays the amount of available$/$free disk space for all mounted filesystems.

Use the option that displays sizes in human readable format. Display only the first $15$ lines of output.

$3.$ Modify the $.$profile file in your home directory to include the following:

Declare the terminal type keyword shell variable TERM with the value vt$100.$ Make the variable global.

Create a function with the name $$psuser$$ that will display the date and will list all processes on the

process status list for a specific user. The user must be passed to the function as a command line

argument when the function is executed.

Create a function with the name $$whoson$$ that will display the date and a sorted list of users

logged into the system.

$4.$ Execute the $.$profile using the dot command. Execute the following commands and redirect output to the

file lab$5.$out$1$ located in your lab$5$ directory.

a$.$ Display the value of the term type variable.

b$.$ Execute the psuser function providing your username as a command line argument.

c$.$ Execute the whoson function.

$5.$ Run the lab$5.$scr script multiple times to execute all menu interface choices. Use the tee command to

redirect output to the file lab$5.$out in your lab$5$ directory.

$($Example: $../$lab$5.$scr $|$ tee $-$a lab$5.$out$)$

include screenshots please