diff -Naurp0 old/CreatePersistentImg.sh new/CreatePersistentImg.sh
--- CreatePersistentImg.sh	2021-07-17 13:13:51.000000000 +0300
+++ CreatePersistentImg.sh	2021-07-20 17:37:53.605911754 +0300
@@ -94,7 +94,3 @@ if [ -n "$config" ]; then
-    if [ -d ./persist_tmp_mnt ]; then
-        rm -rf ./persist_tmp_mnt
-    fi
-    
-    mkdir ./persist_tmp_mnt
-    if mount $freeloop ./persist_tmp_mnt; then
-        echo '/ union' > ./persist_tmp_mnt/$config
+    path_to_persist_mnt="$(mktemp -d)"
+    if mount $freeloop "$path_to_persist_mnt"; then
+        echo '/ union' > "$path_to_persist_mnt"/$config
@@ -102 +98 @@ if [ -n "$config" ]; then
-        umount ./persist_tmp_mnt
+        umount "$path_to_persist_mnt"
@@ -104 +100 @@ if [ -n "$config" ]; then
-    rm -rf ./persist_tmp_mnt
+    rm -rf "$path_to_persist_mnt"
diff -Naurp0 old/tool/VentoyWorker.sh new/tool/VentoyWorker.sh
--- tool/VentoyWorker.sh	2021-07-17 13:13:51.000000000 +0300
+++ tool/VentoyWorker.sh	2021-07-20 17:27:10.885452119 +0300
@@ -153,12 +152,0 @@ fi
-#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
-        vterr "tmp_mnt directory exits, please delete it first."
-        exit 1
-    fi
-fi
-
-
@@ -322 +310 @@ if [ "$MODE" = "install" ]; then
-        mkdir ./tmp_mnt
+        path_to_mnt="$(mktemp -d)"
@@ -326 +314 @@ if [ "$MODE" = "install" ]; then
-            if mount ${PART2} ./tmp_mnt > /dev/null 2>&1; then
+            if mount ${PART2} "$path_to_mnt" > /dev/null 2>&1; then
@@ -335,9 +323,9 @@ if [ "$MODE" = "install" ]; then
-        rm -f ./tmp_mnt/EFI/BOOT/BOOTX64.EFI
-        rm -f ./tmp_mnt/EFI/BOOT/grubx64.efi
-        rm -f ./tmp_mnt/EFI/BOOT/BOOTIA32.EFI
-        rm -f ./tmp_mnt/EFI/BOOT/grubia32.efi
-        rm -f ./tmp_mnt/EFI/BOOT/MokManager.efi
-        rm -f ./tmp_mnt/EFI/BOOT/mmia32.efi
-        rm -f ./tmp_mnt/ENROLL_THIS_KEY_IN_MOKMANAGER.cer
-        mv ./tmp_mnt/EFI/BOOT/grubx64_real.efi  ./tmp_mnt/EFI/BOOT/BOOTX64.EFI
-        mv ./tmp_mnt/EFI/BOOT/grubia32_real.efi  ./tmp_mnt/EFI/BOOT/BOOTIA32.EFI
+        rm -f "$path_to_mnt"/EFI/BOOT/BOOTX64.EFI
+        rm -f "$path_to_mnt"/EFI/BOOT/grubx64.efi
+        rm -f "$path_to_mnt"/EFI/BOOT/BOOTIA32.EFI
+        rm -f "$path_to_mnt"/EFI/BOOT/grubia32.efi
+        rm -f "$path_to_mnt"/EFI/BOOT/MokManager.efi
+        rm -f "$path_to_mnt"/EFI/BOOT/mmia32.efi
+        rm -f "$path_to_mnt"/ENROLL_THIS_KEY_IN_MOKMANAGER.cer
+        mv "$path_to_mnt"/EFI/BOOT/grubx64_real.efi  "$path_to_mnt"/EFI/BOOT/BOOTX64.EFI
+        mv "$path_to_mnt"/EFI/BOOT/grubia32_real.efi  "$path_to_mnt"/EFI/BOOT/BOOTIA32.EFI
@@ -348 +336 @@ if [ "$MODE" = "install" ]; then
-            if umount ./tmp_mnt; then
+            if umount "$path_to_mnt"; then
@@ -350 +338 @@ if [ "$MODE" = "install" ]; then
-                rm -rf ./tmp_mnt
+                rm -rf "$path_to_mnt"
@@ -407,2 +395,2 @@ else
-    rm -f ./diskuuid.bin
-    dd status=none conv=fsync if=${DISK} skip=384 bs=1 count=16 of=./diskuuid.bin
+    path_to_diskuuid="$(mktemp)"
+    dd status=none conv=fsync if=${DISK} skip=384 bs=1 count=16 of="$path_to_diskuuid"
@@ -411,2 +399,2 @@ else
-    dd status=none conv=fsync if=./diskuuid.bin of=$DISK bs=1 count=16 seek=384
-    rm -f ./diskuuid.bin
+    dd status=none conv=fsync if="$path_to_diskuuid" of=$DISK bs=1 count=16 seek=384
+    rm -f "$path_to_diskuuid"
@@ -415,2 +403,2 @@ else
-    rm -f ./rsvdata.bin
-    dd status=none conv=fsync if=${DISK} skip=2040 bs=512 count=8 of=./rsvdata.bin
+    path_to_rsvdata="$(mktemp)"
+    dd status=none conv=fsync if=${DISK} skip=2040 bs=512 count=8 of="$path_to_rsvdata"
@@ -438,2 +426,2 @@ else
-    dd status=none conv=fsync if=./rsvdata.bin seek=2040 bs=512 count=8 of=${DISK}
-    rm -f ./rsvdata.bin
+    dd status=none conv=fsync if="$path_to_rsvdata" seek=2040 bs=512 count=8 of=${DISK}
+    rm -f "$path_to_rsvdata"
@@ -448 +436 @@ else
-        mkdir ./tmp_mnt
+        path_to_mnt="$(mktemp -d)"
@@ -454 +442 @@ else
-            if mount ${PART2} ./tmp_mnt > /dev/null 2>&1; then
+            if mount ${PART2} "$path_to_mnt" > /dev/null 2>&1; then
@@ -463,9 +451,9 @@ else
-        rm -f ./tmp_mnt/EFI/BOOT/BOOTX64.EFI
-        rm -f ./tmp_mnt/EFI/BOOT/grubx64.efi
-        rm -f ./tmp_mnt/EFI/BOOT/BOOTIA32.EFI
-        rm -f ./tmp_mnt/EFI/BOOT/grubia32.efi
-        rm -f ./tmp_mnt/EFI/BOOT/MokManager.efi
-        rm -f ./tmp_mnt/EFI/BOOT/mmia32.efi
-        rm -f ./tmp_mnt/ENROLL_THIS_KEY_IN_MOKMANAGER.cer
-        mv ./tmp_mnt/EFI/BOOT/grubx64_real.efi  ./tmp_mnt/EFI/BOOT/BOOTX64.EFI
-        mv ./tmp_mnt/EFI/BOOT/grubia32_real.efi  ./tmp_mnt/EFI/BOOT/BOOTIA32.EFI
+        rm -f "$path_to_mnt"/EFI/BOOT/BOOTX64.EFI
+        rm -f "$path_to_mnt"/EFI/BOOT/grubx64.efi
+        rm -f "$path_to_mnt"/EFI/BOOT/BOOTIA32.EFI
+        rm -f "$path_to_mnt"/EFI/BOOT/grubia32.efi
+        rm -f "$path_to_mnt"/EFI/BOOT/MokManager.efi
+        rm -f "$path_to_mnt"/EFI/BOOT/mmia32.efi
+        rm -f "$path_to_mnt"/ENROLL_THIS_KEY_IN_MOKMANAGER.cer
+        mv "$path_to_mnt"/EFI/BOOT/grubx64_real.efi  "$path_to_mnt"/EFI/BOOT/BOOTX64.EFI
+        mv "$path_to_mnt"/EFI/BOOT/grubia32_real.efi  "$path_to_mnt"/EFI/BOOT/BOOTIA32.EFI
@@ -476 +464 @@ else
-            if umount ./tmp_mnt > /dev/null 2>&1; then
+            if umount "$path_to_mnt" > /dev/null 2>&1; then
@@ -478 +466 @@ else
-                rm -rf ./tmp_mnt
+                rm -rf "$path_to_mnt"