export VBOX_LOG_DEST="nofile stderr"
export VBOX_LOG_FLAGS="thread time"
export VBOX_LOG="+dev_sb16.e.l.f"
export VBOX_RELEASE_LOG_DEST="nofile stderr"
export VBOX_RELEASE_LOG="-all +dev_sb16.e.l.f"

#export VBOX_LOG=""