Problem
1. Can you have the same user-id more than once in the who output?
2. Both your local and remote machines use identical versions of UNIX. How do you confirm whether you are logged in to a remote machine or not?
3. Which command does the nonprivileged user use to change the system date and time?
4. Display the current date in the form dd/mm/yyyy.
5. You need to accept a secret code through a shell script. What command will you run in the script to make sure that your keyboard input is not displayed? How do you then revert to the normal setting?
6. Explain why it is possible to key in the next command before the previous command has completed execution.
7. What will you do to ensure that [Ctrl-c] interrupts a program? Will it work the next time you log in?