diff --git a/install b/install
index 8b74319..8fbed38 100755
--- a/install
+++ b/install
@@ -7,6 +7,8 @@ set -u          # treat unset variable as error
 SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
 PARENT_DIR="$(dirname "$SCRIPT_DIR")"
 ISO_DIR="$(dirname "$SCRIPT_DIR")"
+#ISO_DIR=$SCRIPT_DIR/iso
+#ISO_DIR=/build/nfs/iso
 
 . $SCRIPT_DIR/linux-live/minioslib || exit 1
 #. $SCRIPT_DIR/linux-live/installlib || exit 1
diff --git a/linux-live/minioslib b/linux-live/minioslib
index b06a323..76c9648 100644
--- a/linux-live/minioslib
+++ b/linux-live/minioslib
@@ -18,16 +18,17 @@ function common_variables() {
 	# log
 	#OUTPUT="/$LIVEKITNAME.log"
 
-	# Эта переменная задаётся в файле ./install
-	#ISO_DIR=$SCRIPT_DIR/iso
-	#ISO_DIR=/build/nfs/iso
-	#ISO_DIR="$(dirname "$SCRIPT_DIR")"
-
+	# if = "1", creates a second iso with a constant filename
+	# если ="1", создаёт второй iso с постоянным именем файла
 	BUILD_TEST_ISO="1"
 
+	# if = "1", creates a copy of minios-live in chroot /opt
+	# если ="1", создаёт копию minios-live в chroot /opt
 	DEV_SYSTEM="1"
 
-	CREATE_BACKUP="1"
+	# if ="1", creates backup in parent folder
+	# если ="1", создаёт резервную копию в родительской папке
+	CREATE_BACKUP="0"
 
 	DEBIAN_FRONTEND_TYPE="noninteractive"
 	#DEBIAN_FRONTEND_TYPE="ncurses"
@@ -568,8 +569,10 @@ function build_iso() {
 
 	VER="$SYSTEMNAME $VER"
 
-	if ! $M -hide-rr-moved -f -r -J -l -V "$VER" -A "$VER" \
-		$B $C $D $E -o $ISO $DIR; then
+	if
+		! $M -hide-rr-moved -f -r -J -l -V "$VER" -A "$VER" \
+		$B $C $D $E -o $ISO $DIR
+	then
 		exit 1
 	fi
 
@@ -641,12 +644,12 @@ function hostreq_pkg_list() {
 	echo -e "${YELLOW}=====> installing required software for host system ...${ENDCOLOUR}"
 	if [ -f $SCRIPT_DIR/linux-live/pkglists/hostreq.list ]; then
 		sudo DEBIAN_FRONTEND=$DEBIAN_FRONTEND_TYPE \
-			$APT_CMD update >>$OUTPUT 2>&1 &&
+		$APT_CMD update >>$OUTPUT 2>&1 &&
 			$APT_CMD install -y \
-				$(grep -vE "^\s*#" $SCRIPT_DIR/linux-live/pkglists/hostreq.list | tr "\n" " ") >>$OUTPUT 2>&1
+		$(grep -vE "^\s*#" $SCRIPT_DIR/linux-live/pkglists/hostreq.list | tr "\n" " ") >>$OUTPUT 2>&1
 	else
 		sudo DEBIAN_FRONTEND=$DEBIAN_FRONTEND_TYPE \
-			$APT_CMD update >>$OUTPUT 2>&1 &&
+		$APT_CMD update >>$OUTPUT 2>&1 &&
 			$APT_CMD install -y binutils debootstrap squashfs-tools xorriso grub-pc-bin grub-efi-$DISTRIBUTION_ARCH-bin mtools >>$OUTPUT 2>&1
 	fi
 }
@@ -659,7 +662,7 @@ function prereq_pkg_list() {
 			$APT_CMD upgrade $APT_OPTIONS >>$OUTPUT 2>&1 &&
 			echo -e "${YELLOW}=====> installing packages ...${ENDCOLOUR}" &&
 			$APT_CMD install $APT_OPTIONS \
-				$(grep -vE "^\s*#" $SCRIPT_DIR/pkglists/prereq.list | tr "\n" " ") >>$OUTPUT 2>&1
+		$(grep -vE "^\s*#" $SCRIPT_DIR/pkglists/prereq.list | tr "\n" " ") >>$OUTPUT 2>&1
 	else
 		# we need to install systemd first, to configure machine id
 		$APT_CMD update >>$OUTPUT 2>&1 &&
@@ -674,12 +677,12 @@ function main_pkg_list() {
 	echo -e "${YELLOW}=====> installing main packages for chroot system ...${ENDCOLOUR}"
 	if [ -f $SCRIPT_DIR/pkglists/hostreq.list ]; then
 		sudo DEBIAN_FRONTEND=$DEBIAN_FRONTEND_TYPE \
-			$APT_CMD update >>$OUTPUT 2>&1 &&
+		$APT_CMD update >>$OUTPUT 2>&1 &&
 			$APT_CMD install $APT_OPTIONS \
-				$(grep -vE "^\s*#" $SCRIPT_DIR/pkglists/main.list | tr "\n" " ") >>$OUTPUT 2>&1
+		$(grep -vE "^\s*#" $SCRIPT_DIR/pkglists/main.list | tr "\n" " ") >>$OUTPUT 2>&1
 	else
 		sudo DEBIAN_FRONTEND=$DEBIAN_FRONTEND_TYPE \
-			$APT_CMD update >>$OUTPUT 2>&1 &&
+		$APT_CMD update >>$OUTPUT 2>&1 &&
 			$APT_CMD install $APT_OPTIONS ubuntu-minimal resolvconf xz-utils linux-image-generic >>$OUTPUT 2>&1
 	fi
 }
@@ -688,9 +691,9 @@ function other_pkg_list() {
 	echo -e "${YELLOW}=====> installing other packages for chroot system ...${ENDCOLOUR}"
 	if [ -f $SCRIPT_DIR/pkglists/hostreq.list ]; then
 		sudo DEBIAN_FRONTEND=$DEBIAN_FRONTEND_TYPE \
-			$APT_CMD update >>$OUTPUT 2>&1 &&
+		$APT_CMD update >>$OUTPUT 2>&1 &&
 			$APT_CMD install $APT_OPTIONS \
-				$(grep -vE "^\s*#" $SCRIPT_DIR/pkglists/other.list | tr "\n" " ") >>$OUTPUT 2>&1
+		$(grep -vE "^\s*#" $SCRIPT_DIR/pkglists/other.list | tr "\n" " ") >>$OUTPUT 2>&1
 	fi
 }