Problem
1. What is a pager? Name the two standard pagers used by man.
2. You located the string crontab in a man page by searching with /crontab[Enter]. How do you find out the other occurrences of this string in the page?
3. You don't know the name of the command that could do a job. What do you do?
4. How do you find out the users who are idling from the man documentation of who?