diff --git a/INSTALL b/INSTALL
index e1e63ae..9641b69 100755
--- a/INSTALL
+++ b/INSTALL
@@ -9,6 +9,8 @@ if [ "$(uname -s)" = "Darwin" ]; then
 else
 	DISTRIB=$(cat /etc/lsb-release | grep "DISTRIB_ID" | awk -F "=" '{print $2}')
 	DISTRIB_RELEASE=$(cat /etc/lsb-release | grep "DISTRIB_RELEASE" | awk -F "=" '{print $2}')
+	# Numeric form of the release for comparisons: 26.04 -> 2604, 18.10 -> 1810
+	DISTRIB_VER=$(awk -F. '{ printf "%d%02d", $1, $2 }' <<< "$DISTRIB_RELEASE")
 fi
 
 AML_FLASH_TOOL_DIR="$BASE/aml-flash-tool"
@@ -28,14 +30,15 @@ error_msg() {
 }
 
 setup_ubuntu_host() {
-	local hostdeps="libusb-dev git parted lib32z1 lib32stdc++6 libusb-0.1-4 libusb-1.0-0-dev libusb-1.0-0 ccache libncurses5 pv base-files linux-base xz-utils"
+	local hostdeps="libusb-dev git parted lib32z1 lib32stdc++6 libusb-0.1-4 libusb-1.0-0-dev libusb-1.0-0 ccache pv base-files linux-base xz-utils"
 	local deps=()
 	local installed=$(dpkg-query -W -f '${db:Status-Abbrev}|${binary:Package}\n' '*' 2>/dev/null | grep '^ii' | awk -F '|' '{print $2}' | cut -d ':' -f 1)
 
-	if [[ "$DISTRIB" == "Ubuntu" ]] && [[ "$DISTRIB_RELEASE" == "18.10" || "$DISTRIB_RELEASE" =~ "20" || "$DISTRIB_RELEASE" =~ "22" || "$DISTRIB_RELEASE" =~ "24" ]]; then
-		hostdeps="$hostdeps lib32ncurses6"
+	# ncurses5 was dropped after 18.04; 18.10 and newer carry the ncurses6 packages
+	if (( DISTRIB_VER >= 1810 )); then
+		hostdeps="$hostdeps libncurses6 lib32ncurses6"
 	else
-		hostdeps="$hostdeps lib32ncurses5"
+		hostdeps="$hostdeps libncurses5 lib32ncurses5"
 	fi
 
 	for packet in $hostdeps; do
diff --git a/aml-flash-tool/INSTALL b/aml-flash-tool/INSTALL
index 666db62..89884b9 100755
--- a/aml-flash-tool/INSTALL
+++ b/aml-flash-tool/INSTALL
@@ -9,6 +9,8 @@ if [ "$(uname -s)" = "Darwin" ]; then
 else
 	DISTRIB=$(cat /etc/lsb-release | grep "DISTRIB_ID" | awk -F "=" '{print $2}')
 	DISTRIB_RELEASE=$(cat /etc/lsb-release | grep "DISTRIB_RELEASE" | awk -F "=" '{print $2}')
+	# Numeric form of the release for comparisons: 26.04 -> 2604, 18.10 -> 1810
+	DISTRIB_VER=$(awk -F. '{ printf "%d%02d", $1, $2 }' <<< "$DISTRIB_RELEASE")
 fi
 
 FLASH_TOOL="$BASE/flash-tool"
@@ -56,7 +58,7 @@ if [ "$DISTRIB" != "macOS" ]; then
 		RULE="$RULES_DIR/70-persistent-usb-ubuntu12.rules"
 		sudo cp $RULE /etc/udev/rules.d
 		sudo sed -i s/OWNER=\"amlogic\"/OWNER=\"`whoami`\"/g /etc/udev/rules.d/$(basename $RULE)
-	elif [[ "$IGNORE_CHECK" == "yes" || "$DISTRIB_RELEASE" =~ "14" || "$DISTRIB_RELEASE" =~ "16" || "$DISTRIB_RELEASE" =~ "18" || "$DISTRIB_RELEASE" =~ "19" || "$DISTRIB_RELEASE" =~ "20" || "$DISTRIB_RELEASE" =~ "22" || "$DISTRIB_RELEASE" =~ "24"  ]]; then
+	elif [[ "$IGNORE_CHECK" == "yes" ]] || (( DISTRIB_VER >= 1400 )); then
 		RULE="$RULES_DIR/70-persistent-usb-ubuntu14.rules"
 		sudo cp $RULE /etc/udev/rules.d
 	else
diff --git a/aml-flash-tool/UNINSTALL b/aml-flash-tool/UNINSTALL
index 9591357..a563b24 100755
--- a/aml-flash-tool/UNINSTALL
+++ b/aml-flash-tool/UNINSTALL
@@ -9,6 +9,8 @@ if [ "$(uname -s)" = "Darwin" ]; then
 else
 	DISTRIB=$(cat /etc/lsb-release | grep "DISTRIB_ID" | awk -F "=" '{print $2}')
 	DISTRIB_RELEASE=$(cat /etc/lsb-release | grep "DISTRIB_RELEASE" | awk -F "=" '{print $2}')
+	# Numeric form of the release for comparisons: 26.04 -> 2604, 18.10 -> 1810
+	DISTRIB_VER=$(awk -F. '{ printf "%d%02d", $1, $2 }' <<< "$DISTRIB_RELEASE")
 fi
 
 KHADAS_TOOL_NAME="aml-burn-tool"
@@ -37,7 +39,7 @@ if [[ "$DISTRIB" != "macOS" ]]; then
 
 	if [[ "$DISTRIB_RELEASE" =~ "12" ]]; then
 		RULE="/etc/udev/rules.d/70-persistent-usb-ubuntu12.rules"
-	elif [[ "$DISTRIB_RELEASE" =~ "14" || "$DISTRIB_RELEASE" =~ "16" || "$DISTRIB_RELEASE" =~ "18" || "$DISTRIB_RELEASE" =~ "20" ]]; then
+	elif (( DISTRIB_VER >= 1400 )); then
 		RULE="/etc/udev/rules.d/70-persistent-usb-ubuntu14.rules"
 	else
 	#	error_msg "Ubuntu $DISTRIB_RELEASE haven't been verified!"
diff --git a/rk-flash-tool/INSTALL b/rk-flash-tool/INSTALL
index 48dc905..64a09b5 100755
--- a/rk-flash-tool/INSTALL
+++ b/rk-flash-tool/INSTALL
@@ -11,6 +11,8 @@ else
 	ANDROID_TOOL_CONFIG="$BASE/tools/Linux_Upgrade_Tool/config.ini"
 	DISTRIB=$(cat /etc/lsb-release | grep "DISTRIB_ID" | awk -F "=" '{print $2}')
 	DISTRIB_RELEASE=$(cat /etc/lsb-release | grep "DISTRIB_RELEASE" | awk -F "=" '{print $2}')
+	# Numeric form of the release for comparisons: 26.04 -> 2604, 18.10 -> 1810
+	DISTRIB_VER=$(awk -F. '{ printf "%d%02d", $1, $2 }' <<< "$DISTRIB_RELEASE")
 fi
 
 FLASH_TOOL="$BASE/flash-tool"
@@ -54,7 +56,7 @@ fi
 if [ "$DISTRIB" != "macOS" ]; then
 	echo "Installing USB rules..."
 
-	if [[ "$IGNORE_CHECK" == "yes" || "$DISTRIB_RELEASE" =~ "16" || "$DISTRIB_RELEASE" =~ "18" || "$DISTRIB_RELEASE" =~ "20" || "$DISTRIB_RELEASE" =~ "22" || "$DISTRIB_RELEASE" =~ "24" ]]; then
+	if [[ "$IGNORE_CHECK" == "yes" ]] || (( DISTRIB_VER >= 1600 )); then
 		RULE="$RULES_DIR/80-rockchip-usb.rules"
 		sudo cp $RULE /etc/udev/rules.d
 	else
diff --git a/tone-dfu-tool/INSTALL b/tone-dfu-tool/INSTALL
index 8d52fba..5bad86a 100755
--- a/tone-dfu-tool/INSTALL
+++ b/tone-dfu-tool/INSTALL
@@ -9,6 +9,8 @@ if [ "$(uname -s)" = "Darwin" ] ; then
 else
 	DISTRIB=$(cat /etc/lsb-release | grep "DISTRIB_ID" | awk -F "=" '{print $2}')
 	DISTRIB_RELEASE=$(cat /etc/lsb-release | grep "DISTRIB_RELEASE" | awk -F "=" '{print $2}')
+	# Numeric form of the release for comparisons: 26.04 -> 2604, 18.10 -> 1810
+	DISTRIB_VER=$(awk -F. '{ printf "%d%02d", $1, $2 }' <<< "$DISTRIB_RELEASE")
 fi
 
 KHADAS_TOOL="$BASE/tone-burn-tool"
@@ -51,7 +53,7 @@ fi
 if [ "$DISTRIB" != "macOS" ]; then
 	echo "Installing USB rules..."
 
-	if [[ "$IGNORE_CHECK" == "yes" || "$DISTRIB_RELEASE" =~ "16" || "$DISTRIB_RELEASE" =~ "18" || "$DISTRIB_RELEASE" =~ "20" || "$DISTRIB_RELEASE" =~ "22" || "$DISTRIB_RELEASE" =~ "24" ]]; then
+	if [[ "$IGNORE_CHECK" == "yes" ]] || (( DISTRIB_VER >= 1600 )); then
 		RULE="$RULES_DIR/80-tone-usb.rules"
 		sudo cp $RULE /etc/udev/rules.d
 	else