Unix scripting

1) Write a bourne shell script that takes a list of login names as its arguments and displays the number of terminals that each user is logged onto in a LAN environment. 2) Write a bourne shell script that displays the following menu and prompts you for one char input to invoke a menu option as follows. a. List all files in the present working directory. b. Display today’s date and time c. Invoke shell script for problem 13. d. Display whether a file is a simple file or a directory. e. Create backup for a file f. Start a telnet session. g. Start a ftp session x. Exit Option c requires that u ask for a list of login names and for option d and e insert a prompt for a file names before invoking a shell command / program. For options f and g insert a prompt for a domain name ( or IP address) before initiating a telnet or ftp session. The program should allow you to try any option any number of times and shoul quit only when u give a option x as input. 3) Write a shell script that takes an ordinary file as an argument and removes the file if the size is zero. Otherwise the script displays file’s name, size, number of hard links, owner, and modify date (in this order) on one line. Your script must do appropriate error checking. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. ## Platform windows xp in all 3.0+ versions of internet explorer.