3. To see what a command does (including its available options), view the commands man page.

a. What does man stand for?

b. Type man ps. Use the space bar or arrow keys to control moving up and down in the man page and q to exit. What does this man page tell you about ps? Provide a short (2-3 line) summary. Use man to explore each of these commands and answer the following questions:

c. ls: what does a do? what does r do? what does R do?

d. who: what does b do? what does H do?

e. vmstat: what does this instruction do? there are a number of synopses, what are these?