Plan 9 from Bell Labs’s /usr/web/sources/contrib/yk/lab/unix
--rwxr-xr-x yk sys 675 Apr 16 17:43 dircpu --rw-r--r-- yk sys 2077 Apr 16 17:31 guide --rwxr-xr-x yk sys 1460 Apr 16 17:10 r --rwxr-xr-x yk sys 510 Apr 17 15:32 rfs
