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  • yes I agree, named pipes are probably the most overrated thing I can think of - I always have problems when I try to use them. with unix domain sockets, I would need multiple servers listening from the same socket - which isn't possible. But multiple "servers" can cat the same fifo, so that works out better. Commented Jun 5, 2019 at 0:20
  • can you explain how this works a little bit more? Why file descriptor 1? Commented Jun 5, 2019 at 0:22
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    Because the <> redirection will use the stdin (0) by default (except in ksh93, as explained in the linked answer from Stéphane Chazelas). Commented Jun 5, 2019 at 0:24
  • Right but why does it have to be 1 instead of 0? (stdout instead of stdin) Commented Jun 5, 2019 at 0:26
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    Instead of exploiting the fact that dup2 is closing the oldfd, you can use another fd and close it explicitly with the same effect: /bin/echo 7<>fifo >fifo 7>&-. Commented Jun 5, 2019 at 0:40