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--rw-r--r-- rsc sys 599 Dec 30  2005 echo.c
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d-rwxr-xr-x rsc sys   0 Jul 15  2018 linux
d-rwxr-xr-x rsc sys   0 Jul 15  2018 port
--rw-r--r-- rsc sys 273 Dec 30  2005 testmain.c