#check tmp_mnt directory
if [ -d ./tmp_mnt ]; then
vtdebug "There is a tmp_mnt directory, now delete it."
umount ./tmp_mnt >/dev/null 2>&1
rm -rf ./tmp_mnt
if [ -d ./tmp_mnt ]; then
#check tmp_mnt directory
if [ -d ./tmp_mnt ]; then
vtdebug "There is a tmp_mnt directory, now delete it."
umount ./tmp_mnt >/dev/null 2>&1
rm -rf ./tmp_mnt
if [ -d ./tmp_mnt ]; then