SUGGESTED EXERCISES FOR AWK (1) Use ls -l and awk to obtain the total space consumed by some group of files. (2) Examine the /etc/passwd file with awk to print out only the shells. Pipe the output into sort -u (or into sort | uniq). (3) Use awk to convert the output of who into a list of statements with the following form: User ggww is on terminal line ttyp0 (4) Suppose you have a rule on your system that user id's are to all be at least 4 characters in length. You want to make sure this rule has been followed. Show how to write a list of all user id's which do not follow this rule. (5) Find 1 or 2 (or more ways to print an entire file which are different from the ones shown in class.