Ganti/upload Logo... gagal di linux

Maaf para rekan-rekan developer drupal Untuk hal logo dan icon yang diupload... di windows no-problem, tapi setelah aq coba dilinux alias aq deploy di linux malahan keluar pesan seperti ini, jadinya logo aq gak boleh tampil dech. ---------------------------------------------------- * The selected file /tmp/tmp_sI4ITx could not be uploaded, because the destination logo.png is not properly configured. * The selected file /tmp/tmp_vWYBSr could not be uploaded, because the destination favicon.PNG is not properly configured. ---------------------------------------------------- tolong donk rekan-rekan dan para pakar drupal indonesia bantuannya.....