explain the program in advanceunix? [closed]

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http://stackoverflow.com – I know the fork concept. I try to solve the problem. I do the one fork() process and the fork() process create the one parent and child. If I run the program and i put the arguments of the commands. The parent receive or take the name of the commands and the child will process the command and send to the results of the parent and now parent executed by the Result of the command. explain any example of the program? parent : get command name - ls child : execute that command not display parent : execute the command result file1 file2 file3 (HowTos)