|1.||What does the shell ordinarily do while a command is executing? What should you do if you do not want to wait for a command to finish before running another command?|
|2.||Using sort as a filter, rewrite the following sequence of commands:
$ sort list > temp $ lpr temp $ rm temp
|3.||What is a PID number? Why are they useful when you run processes in the background?|
|4.||Assume that the following files are in the working directory:
$ ls intro notesb ref2 section1 section3 section4b notesa ref1 ref3 section2 section4a sentrev
Give commands for each of the following, using wildcards to express filenames with as few characters as possible.