¿No se supone que los binarios en /bin y /sbin no deben depender de otros sistemas de ficheros?
Pues algunos programas en Debian dependen de bibliotecas en /usr. bennett:/bin$ ldd * |grep usr libpci.so.1 => /usr/lib/libpci.so.1 (0x40029000) libpci.so.1 => /usr/lib/libpci.so.1 (0x40029000) bennett:/sbin$ ldd * |grep usr libz.so.1 => /usr/lib/libz.so.1 (0x40029000) libz.so.1 => /usr/lib/libz.so.1 (0x40029000) libgssapi_krb5.so.2 => /usr/lib/libgssapi_krb5.so.2 (0x40080000) libkrb5.so.3 => /usr/lib/libkrb5.so.3 (0x40091000) libk5crypto.so.3 => /usr/lib/libk5crypto.so.3 (0x400ef000) libldap.so.2 => /usr/lib/libldap.so.2 (0x40113000) liblber.so.2 => /usr/lib/liblber.so.2 (0x40145000) libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x4028a000) libgnutls.so.7 => /usr/lib/libgnutls.so.7 (0x4029e000) libtasn1.so.0 => /usr/lib/libtasn1.so.0 (0x402d6000) libgcrypt.so.1 => /usr/lib/libgcrypt.so.1 (0x402e4000) libz.so.1 => /usr/lib/libz.so.1 (0x40321000) libgssapi_krb5.so.2 => /usr/lib/libgssapi_krb5.so.2 (0x40080000) libkrb5.so.3 => /usr/lib/libkrb5.so.3 (0x40091000) libk5crypto.so.3 => /usr/lib/libk5crypto.so.3 (0x400ef000) libldap.so.2 => /usr/lib/libldap.so.2 (0x40113000) liblber.so.2 => /usr/lib/liblber.so.2 (0x40145000) libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x4028a000) libgnutls.so.7 => /usr/lib/libgnutls.so.7 (0x4029e000) libtasn1.so.0 => /usr/lib/libtasn1.so.0 (0x402d6000) libgcrypt.so.1 => /usr/lib/libgcrypt.so.1 (0x402e4000) libz.so.1 => /usr/lib/libz.so.1 (0x40321000)