Solutions

1.	$ grep ill memo
		Print all lines with pattern ill in file memo.
	$ grep ill memo bigfile
		Print all lines with pattern ill in files memo and bigfile.
	$ grep memo bigfile
		Print all lines with pattern memo in file bigfile.
	$ grep joke bigfile
		Print all lines with pattern joke in file bigfile.
	$ grep nofind bigfile
		Print all lines with pattern nofind in file bigfile.
		(There aren't any)

2. 	Look up grep in a reference.  Try each of the options.  E.g.:

	$ grep -c ill memo
		Print a count of the number of lines containing ill in
		memo.
	$ grep -n ill memo
 		Print the lines, line numbers, and file names of the lines
		containing ill in memo and bigfile.
	$ grep -v subject memo
		Print the lines that do not contain ill in memo.

3.	a.  $ tr '[0-9]' '*' < dbs 
	b.  $ tr '[a-z]' '[A-Z]' < dbs 
	c.  $ tr -d '[aeiou]' < dbs 

4.	$ cut -d':' -f1,3

5.	$ paste greet folks

	Files that get pasted together should have the same number of
	lines, but if they don't paste won't complain.  What will it do?
	Create a couple of files and try it.  Can you paste together
	more that two files at a time?

6.	a.  $ sort +2 dbt   OR   sort -n +2 dbt
	b.  $ sort -r +2 dbt
	c.  $ sort +3 dbt
	d.  $ sort +3.7 dbt	

7. 	$ cp bigfile bigfile2
	$ diff bigfile bigfile2

8.	$ grep memo bigfile | wc -l
	$ grep -c memo bigfile
