/usr/share/dx/samples/program_guide/ is in dxsamples 4.2.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dx/samples/program_guide/Readme
/usr/share/dx/samples/program_guide/add.c
/usr/share/dx/samples/program_guide/add.cfg
/usr/share/dx/samples/program_guide/add.mb
/usr/share/dx/samples/program_guide/add.mdf
/usr/share/dx/samples/program_guide/add.net
/usr/share/dx/samples/program_guide/add2.c
/usr/share/dx/samples/program_guide/add2.cfg
/usr/share/dx/samples/program_guide/add2.mb
/usr/share/dx/samples/program_guide/add2.mdf
/usr/share/dx/samples/program_guide/add2.net
/usr/share/dx/samples/program_guide/add2_invalid.cfg
/usr/share/dx/samples/program_guide/add2_invalid.net
/usr/share/dx/samples/program_guide/add2invalid.c
/usr/share/dx/samples/program_guide/add2invalid.mb
/usr/share/dx/samples/program_guide/add2invalid.mdf
/usr/share/dx/samples/program_guide/add_parallel.c
/usr/share/dx/samples/program_guide/add_parallel.cfg
/usr/share/dx/samples/program_guide/add_parallel.net
/usr/share/dx/samples/program_guide/addpar.mdf
/usr/share/dx/samples/program_guide/all.mdf
/usr/share/dx/samples/program_guide/averagecell.c
/usr/share/dx/samples/program_guide/averagecell.cfg
/usr/share/dx/samples/program_guide/averagecell.mb
/usr/share/dx/samples/program_guide/averagecell.mdf
/usr/share/dx/samples/program_guide/averagecell.net
/usr/share/dx/samples/program_guide/averagecell2.mdf
/usr/share/dx/samples/program_guide/averagecell_parallel.c
/usr/share/dx/samples/program_guide/averagecell_parallel.cfg
/usr/share/dx/samples/program_guide/averagecell_parallel.net
/usr/share/dx/samples/program_guide/averagecellpar.mdf
/usr/share/dx/samples/program_guide/hello.c
/usr/share/dx/samples/program_guide/hello.cfg
/usr/share/dx/samples/program_guide/hello.mdf
/usr/share/dx/samples/program_guide/hello.net
/usr/share/dx/samples/program_guide/hello_errorchecking.c
/usr/share/dx/samples/program_guide/hello_errorchecking.cfg
/usr/share/dx/samples/program_guide/hello_errorchecking.net
/usr/share/dx/samples/program_guide/hello_loadable.mdf
/usr/share/dx/samples/program_guide/hello_outboard.mdf
/usr/share/dx/samples/program_guide/helloerr.mdf
/usr/share/dx/samples/program_guide/makefile
/usr/share/dx/samples/program_guide/makex.c
/usr/share/dx/samples/program_guide/makex.cfg
/usr/share/dx/samples/program_guide/makex.mb
/usr/share/dx/samples/program_guide/makex.mdf
/usr/share/dx/samples/program_guide/makex.net
/usr/share/dx/samples/program_guide/makex_efficient.cfg
/usr/share/dx/samples/program_guide/makex_efficient.net
/usr/share/dx/samples/program_guide/makexeff.c
/usr/share/dx/samples/program_guide/makexeff.mb
/usr/share/dx/samples/program_guide/makexeff.mdf
/usr/share/dx/samples/program_guide/showpick.c
/usr/share/dx/samples/program_guide/showpick.cfg
/usr/share/dx/samples/program_guide/showpick.mdf
/usr/share/dx/samples/program_guide/showpick.net
/usr/share/dx/samples/program_guide/simpleimport.c
/usr/share/dx/samples/program_guide/simpleimport.mdf
/usr/share/dx/samples/program_guide/simpleimportfilter.c