printf("\t%s -F : \"joe123\" '$6' /etc/passwd\n", progname);
printf("\n Find fields 2 3 and 4 on lines that begin with @ from stdin:\n");
printf("\tcat file.txt | %s \"^@\" '$2,$3,$4'\n", progname);
printf("\t%s -F : \"joe123\" '$6' /etc/passwd\n", progname);
printf("\n Find fields 2 3 and 4 on lines that begin with @ from stdin:\n");
printf("\tcat file.txt | %s \"^@\" '$2,$3,$4'\n", progname);