Chapter Review Questions | HP Certified: HP-UX System Administration

1:	What is the difference between the `test` and `let` commands?
2:	Explain the unary and binary negative signs.
3:	Consider the following program. What may be the possible problem? VAR=1 (($VAR=$VAR+1)) while [ $VAR -lt 10 ] do echo $VAR done
4:	Write a program that provides three options. The first option asks the user to enter a number. It then adds the number to 100 and displays the result. The second option subtracts the number from 100 and displays the result. The third option terminates the program.
5:	Write a program that accepts a list of user names on the command line and then displays a message if any of these users is logged in.
6:	Previously all users were using the Bourne shell. The administration has changed the policy and now everyone is asked to use the POSIX shell. Write a program that changes the shell of all users from `/usr/bin/old/sh` to `/usr/bin/sh` .

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