Problem
1. Write a script that checks each minute and reports on who logs in and who logs out
2. Write a script that displays a special formatted listing showing the
(i) permissions,
(ii) size,
(iii) filename,
(iv) last modification time, and
(v) last access time of filenames supplied as arguments. Provide suitable headers using the printf command.
3. Find out the pathname of the Korn shell on your machine and then change the interpreter line in all shell scripts (.sh) in the current directory that show a different pathname for ksh.