Спасибо, тема закрыта. Действительно, затупил и про FIFO забыл начисто.
вот уж затупил так затупил - FIFO тут не при чём!!!
сами тупите, и других путаете 
лично вам, Cruiser78, читать до полного просветления:
FIFO(7) Linux Programmer's Manual FIFO(7)
NAME
fifo - first-in first-out special file, named pipe
DESCRIPTION
A FIFO special file (a named pipe) is similar to a pipe, except that it is accessed as part of the file
system. It can be opened by multiple processes for reading or writing. When processes are exchanging data
via the FIFO, the kernel passes all data internally without writing it to the file system. Thus, the FIFO
special file has no contents on the file system; the file system entry merely serves as a reference point
so that processes can access the pipe using a name in the file system.
The kernel maintains exactly one pipe object for each FIFO special file that is opened by at least one
process. The FIFO must be opened on both ends (reading and writing) before data can be passed. Normally,
opening the FIFO blocks until the other end is opened also.
A process can open a FIFO in non-blocking mode. In this case, opening for read only will succeed even if
no-one has opened on the write side yet, opening for write only will fail with ENXIO (no such device or
address) unless the other end has already been opened.
Under Linux, opening a FIFO for read and write will succeed both in blocking and non-blocking mode. POSIX
leaves this behavior undefined. This can be used to open a FIFO for writing while there are no readers
available. A process that uses both ends of the connection in order to communicate with itself should be
very careful to avoid deadlocks.
NOTES
When a process tries to write to a FIFO that is not opened for read on the other side, the process is sent
a SIGPIPE signal.
FIFO special files can be created by mkfifo(3), and are indicated by ls -l with the file type 'p'.
SEE ALSO
mkfifo(1), open(2), pipe(2), sigaction(2), signal(2), socketpair(2), mkfifo(3), pipe(7)
COLOPHON
This page is part of release 3.15 of the Linux man-pages project. A description of the project, and infor-
mation about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
Linux 2008-12-03 FIFO(7)
остальным замечу, что невозможно объединить объединённое - поток /dev/stdout уже и так один. Просто здесь нужно перенаправить поток от двух команд в другое место. Это решается многими способами, самый простой из которых - запустить команды в отдельном дочернем шелле, и перенаправить вывод не от команд, а от всего этого шелла. Я просто записал две команды в (скобках).
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