Problem
1. How will you (i) doublespace a file, (ii) produce a list of all files in the current directory without headers but in three columns?
2. How will you display only the lines common to two files?
3. The command cmp foo1 foo2 displays nothing. What does that indicate?
4. How does head display its output when used with multiple filenames?
5. How do you display the ps output without the header line?