/usr/share/scilab/modules/mexlib/examples/ is in scilab-data 6.0.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/scilab/modules/mexlib/examples/cmex/
/usr/share/scilab/modules/mexlib/examples/cmex/cmex.sce
/usr/share/scilab/modules/mexlib/examples/cmex/readme.txt
/usr/share/scilab/modules/mexlib/examples/cppmex/
/usr/share/scilab/modules/mexlib/examples/cppmex/builder.sce
/usr/share/scilab/modules/mexlib/examples/cppmex/demo.sce
/usr/share/scilab/modules/mexlib/examples/cppmex/libmex.dia.ref
/usr/share/scilab/modules/mexlib/examples/cppmex/libmex.tst
/usr/share/scilab/modules/mexlib/examples/cppmex/readme.txt
/usr/share/scilab/modules/mexlib/examples/cppmex/temptst.cpp
/usr/share/scilab/modules/mexlib/examples/cppmex/temptst.h
/usr/share/scilab/modules/mexlib/examples/cppmex/temptst2.cpp
/usr/share/scilab/modules/mexlib/examples/fmex/
/usr/share/scilab/modules/mexlib/examples/fmex/builder.sce
/usr/share/scilab/modules/mexlib/examples/fmex/demo.sce
/usr/share/scilab/modules/mexlib/examples/fmex/mexfunction1.F
/usr/share/scilab/modules/mexlib/examples/fmex/readme.txt
/usr/share/scilab/modules/mexlib/examples/interface/
/usr/share/scilab/modules/mexlib/examples/interface/builder.sce
/usr/share/scilab/modules/mexlib/examples/interface/demo.sce
/usr/share/scilab/modules/mexlib/examples/interface/f4.c
/usr/share/scilab/modules/mexlib/examples/interface/fmex1.c
/usr/share/scilab/modules/mexlib/examples/interface/fmex2.c
/usr/share/scilab/modules/mexlib/examples/interface/foof.F
/usr/share/scilab/modules/mexlib/examples/interface/lib/
/usr/share/scilab/modules/mexlib/examples/interface/lib/bar.c
/usr/share/scilab/modules/mexlib/examples/interface/lib/builder.sce
/usr/share/scilab/modules/mexlib/examples/interface/lib/foo.c
/usr/share/scilab/modules/mexlib/examples/interface/lib/pipo.h
/usr/share/scilab/modules/mexlib/examples/interface/libmex.dia.ref
/usr/share/scilab/modules/mexlib/examples/interface/libmex.tst
/usr/share/scilab/modules/mexlib/examples/interface/readme.txt
/usr/share/scilab/modules/mexlib/examples/mexdll/
/usr/share/scilab/modules/mexlib/examples/mexdll/Makelib.mak
/usr/share/scilab/modules/mexlib/examples/mexdll/demo.sce
/usr/share/scilab/modules/mexlib/examples/mexdll/libtst.c
/usr/share/scilab/modules/mexlib/examples/mexdll/readme.txt
/usr/share/scilab/modules/mexlib/examples/mexdll/xtimesy.def
/usr/share/scilab/modules/mexlib/examples/mexdll/xtimesy.dll
/usr/share/scilab/modules/mexlib/examples/mexglx/
/usr/share/scilab/modules/mexlib/examples/mexglx/README
/usr/share/scilab/modules/mexlib/examples/mexglx/foo.c
/usr/share/scilab/modules/mexlib/examples/mexglx/libtst.c
/usr/share/scilab/modules/mexlib/examples/mexglx/test.dia.ref
/usr/share/scilab/modules/mexlib/examples/mexglx/test.sce
/usr/share/scilab/modules/mexlib/examples/mexglx/test1.sce