ti@stretch-ti:/usr/lib/virtualbox$ ldd VirtualBox
ldd: error: you do not have read permission for `./VirtualBox'
ti@stretch-ti:/usr/lib/virtualbox$ sudo ldd VirtualBox
[sudo] password for ti:
	linux-vdso.so.1 (0x00007ffc72faf000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f4d8a6ec000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f4d8a4e8000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4d8a149000)
	/lib64/ld-linux-x86-64.so.2 (0x0000557a443c4000)