diff --git a/actions/check-available-memory.sh b/actions/check-available-memory.sh
index db37011..a993c69 100755
--- a/actions/check-available-memory.sh
+++ b/actions/check-available-memory.sh
@@ -45,3 +45,4 @@ else
     exit 1
   fi
 fi
+echo "Done."
diff --git a/actions/clean-previous-installation.sh b/actions/clean-previous-installation.sh
index 5fa059e..de6da99 100755
--- a/actions/clean-previous-installation.sh
+++ b/actions/clean-previous-installation.sh
@@ -26,3 +26,4 @@ source ./functions/network.sh
 
 # Delete all VMs from the previous Mirantis OpenStack installation
 delete_vms_multiple $vm_name_prefix
+echo "Done."
diff --git a/actions/create-interfaces.sh b/actions/create-interfaces.sh
index f2294cf..4b4a0b1 100755
--- a/actions/create-interfaces.sh
+++ b/actions/create-interfaces.sh
@@ -25,12 +25,13 @@ source ./config.sh
 source ./functions/vm.sh
 source ./functions/network.sh
 
-# Delete host-only interfaces
+echo "Deleting old interfaces if exists..."
 if [[ "$rm_network" == "0" ]]; then
     delete_fuel_ifaces
 else
     delete_all_hostonly_interfaces
 fi
+echo
 
 # Create the required host-only interfaces
 for ip in $fuel_master_ips; do
diff --git a/actions/master-node-create-and-install.sh b/actions/master-node-create-and-install.sh
index 11ff542..c940536 100755
--- a/actions/master-node-create-and-install.sh
+++ b/actions/master-node-create-and-install.sh
@@ -32,8 +32,8 @@ get_fuel_name_ifaces
 
 name="${vm_name_prefix}master"
 
+# Create master node VM
 create_vm $name "${host_nic_name[0]}" $vm_master_cpu_cores $vm_master_memory_mb $vm_master_disk_mb
-echo
 
 # Add additional NICs
 add_hostonly_adapter_to_vm $name 2 "${host_nic_name[1]}"
@@ -49,7 +49,7 @@ if [ ${headless} -eq 1 ]; then
   enable_vrde $name ${RDPport}
 fi
 
-if [ "$skipfuelmenu" = "yes" ]; then
+if [ "${skipfuelmenu}" = "yes" ]; then
   cmdline="$(grep 'append initrd' ../iso/isolinux/isolinux.cfg -m1 2> /dev/null | sed -e 's/^[ ]*append//')"
   cmdline="${cmdline:- initrd=initrd.img net.ifnames=0 biosdevname=0 ks=hd:sr0:/ks.cfg ip=10.20.0.2::10.20.0.1:255.255.255.0:fuel.domain.tld:eth0:off::: dns1=10.20.0.1 selinux=0}"
   boot_line="$(translate "$cmdline showmenu=no"$'\n')"
diff --git a/actions/master-node-enable-internet.sh b/actions/master-node-enable-internet.sh
index a3773de..d392b74 100755
--- a/actions/master-node-enable-internet.sh
+++ b/actions/master-node-enable-internet.sh
@@ -1,4 +1,4 @@
-#!/bin/bash 
+#!/bin/bash
 
 #    Copyright 2013 Mirantis, Inc.
 #
diff --git a/actions/prepare-environment.sh b/actions/prepare-environment.sh
index c8ac273..7383473 100755
--- a/actions/prepare-environment.sh
+++ b/actions/prepare-environment.sh
@@ -140,4 +140,4 @@ esac
 echo "OK"
 
 # Report success
-echo "Setup is done."
+echo "Done."
diff --git a/config.sh b/config.sh
index c2bfcff..e2ec1df 100755
--- a/config.sh
+++ b/config.sh
@@ -26,13 +26,10 @@ pxe_path=`ls -1t drivers/*.*rom 2>/dev/null | head -1`
 # Every Mirantis OpenStack machine name will start from this prefix
 vm_name_prefix=fuel-
 
-# By default, all available network interfaces vboxnet won't be removed,
-# if their IP addresses don't match with fuel_master_ips (10.20.0.1 172.16.0.254
-# 172.16.1.1)
-# If you want to remove all existing vbox interfaces, then use rm_network=1
+# By default, all available vbox network interfaces will be removed.
 # 0 - don't remove all vbox networks. Remove only fuel networks if they exist
 # 1 - remove all vbox networks
-rm_network=0
+rm_network=1
 
 # Please add the IPs accordingly if you going to create non-default NICs number
 # 10.20.0.1/24   - Mirantis OpenStack Admin network
diff --git a/functions/network.sh b/functions/network.sh
index 19682b1..cf965cf 100755
--- a/functions/network.sh
+++ b/functions/network.sh
@@ -19,7 +19,8 @@
 source ./functions/shell.sh
 
 get_hostonly_interfaces() {
-  echo -e `execute VBoxManage list hostonlyifs | grep '^Name' | sed 's/^Name\:[ \t]*//' | uniq | tr "\\n" ","`
+  local ifaces=`execute VBoxManage list hostonlyifs | egrep '^Name' | sed 's/^Name\:\s*//' | uniq | tr "\\n" ","`
+  echo -e "${ifaces}"
 }
 
 get_fuel_ifaces() {
@@ -32,7 +33,7 @@ get_fuel_ifaces() {
     fuel_networks+="$fuel_network "
   done
   for ip in $fuel_networks; do
-    fuel_iface=`execute VBoxManage list hostonlyifs | grep -B5 $ip | grep '^Name' | sed 's/^Name\:[ \t]*//' | uniq | tr "\\n" ","`
+    fuel_iface=`execute VBoxManage list hostonlyifs | egrep -B3 $ip | egrep '^Name' | sed 's/^Name\:\s*//' | uniq | tr "\\n" ","`
     fuel_ifaces+="$fuel_iface"
   done
   echo $fuel_ifaces
@@ -64,7 +65,7 @@ is_hostonly_interface_present() {
       ;;
   esac
   # Call VBoxManage directly instead of function, due to changed IFS
-  local found_iface=(`execute VBoxManage list hostonlyifs | grep -E "Name: + $name\$" | awk '/Name/ { $1 = ""; print substr($0, 2) }'`)
+  local found_iface=(`execute VBoxManage list hostonlyifs | egrep "Name: + $name\$" | awk '/Name/ { $1 = ""; print substr($0, 2) }'`)
   # Change default divider back
   case "$(execute uname)" in
     CYGWIN*)
@@ -86,26 +87,21 @@ check_if_iface_settings_applied() {
   ip=$2
   mask=$3
   echo "Verifying interface $name has IP $ip and mask $mask properly set."
-  # Please leave 12 spaces in place - these are placed intentionally
+  OIFS=$IFS
   case "$(execute uname)" in
     CYGWIN*)
-      OIFS=$IFS
       IFS=","
       ;;
     *)
-      ;;
-    esac
-  local new_name=(`execute VBoxManage list hostonlyifs | egrep -A9 "Name:            $name\$" | awk '/Name/ { $1 = ""; print substr($0, 2) }'`)
-  case "$(execute uname)" in
-    CYGWIN*)
       IFS=$OIFS
       ;;
-    *)
-      ;;
   esac
-  local new_ip=(`execute VBoxManage list hostonlyifs | egrep -A9 "Name:            $name\$" | awk '/IPAddress:/ {print $2}'`)
-  local new_mask=(`execute VBoxManage list hostonlyifs | egrep -A9 "Name:            $name\$" | awk '/NetworkMask:/ {print $2}'`)
-  local new_dhcp=(`execute VBoxManage list hostonlyifs | egrep -A9 "Name:            $name\$" | awk '/DHCP:/ {print $2}'`)
+  local new_name=(`execute VBoxManage list hostonlyifs | egrep -A9 "Name: + $name\$" | awk '/Name/ { $1 = ""; print substr($0, 2) }'`)
+  IFS=$OIFS
+  sleep 2s
+  local new_ip=(`execute VBoxManage list hostonlyifs | egrep -A9 "Name: + $name\$" | awk '/IPAddress:/ { print $2 }'`)
+  local new_mask=(`execute VBoxManage list hostonlyifs | egrep -A9 "Name: + $name\$" | awk '/NetworkMask:/ { print $2 }'`)
+  local new_dhcp=(`execute VBoxManage list hostonlyifs | egrep -A9 "Name: + $name\$" | awk '/DHCP:/ { print $2 }'`)
   # First verify if we checking correct interface
   if [[ "$name" != "$new_name" ]]; then
     echo "Checking $name but found settings for $new_name"
@@ -130,7 +126,7 @@ check_if_iface_settings_applied() {
 create_hostonly_interfaces() {
   # Creating host-only interface
   local ip=$1
-  echo "Creating host-only interface"
+  echo "Creating host-only interface..."
   local id=`execute VBoxManage hostonlyif create | sed "s/'/_/g" | cut -d "_" -f2 | sed "s/^_//" | sed "s/_$//"`
   # If it does not exist after creation, let's abort
   if ! is_hostonly_interface_present "$id"; then
@@ -143,14 +139,12 @@ create_hostonly_interfaces() {
   echo "Disabling DHCP server on interface: $name..."
   # These magic 1 second sleeps around DHCP config are required under Windows/Cygwin
   # due to VBoxSvc COM server accepts next request before previous one is actually finished.
-  sleep 1s
+  sleep 2s
   execute VBoxManage dhcpserver remove --ifname "$name" 2>/dev/null
-  sleep 1s
+  sleep 2s
   # Set up IP address and network mask
   echo "Configuring IP address $ip and network mask $mask on interface: $name..."
-  set -x
   execute VBoxManage hostonlyif ipconfig "$id" --ip $ip --netmask $mask
-  set +x
   # Check what we have created actually.
   # Sometimes VBox occasionally fails to apply settings to the last IFace under Windows
   if !(check_if_iface_settings_applied "$id" $ip $mask); then
@@ -161,6 +155,7 @@ create_hostonly_interfaces() {
     echo "Aborting."
     exit 1
   fi
+  echo
 }
 
 # Checking that the interface has been removed
@@ -187,18 +182,22 @@ delete_fuel_ifaces() {
       check_removed_iface "$interface"
     done
   fi
+  echo "Done."
 }
 
 delete_all_hostonly_interfaces() {
   # All the hostonly interfaces will be removed
   local all_hostonly_interfaces=$(get_hostonly_interfaces)
   # Checking that the running virtual machines don't use removable host-only interfaces
-  check_running_vms "$all_hostonly_interfaces"
-  OIFS=$IFS;IFS=",";list=(`execute VBoxManage list hostonlyifs | grep '^Name' | sed 's/^Name\:[ \t]*//' | uniq | tr "\\n" ","`);IFS=$OIFS
+  check_running_vms $all_hostonly_interfaces
+  OIFS=$IFS
+  IFS=","
   # Delete every single hostonly interface in the system
-  for interface in "${list[@]}"; do
-    echo "Deleting host-only interface: $interface..."
-    execute VBoxManage hostonlyif remove "$interface"
-    check_removed_iface "$interface"
+  for interface in $all_hostonly_interfaces; do
+    IFS=$OIFS
+    echo "Deleting host-only interface: ${interface}..."
+    execute VBoxManage hostonlyif remove "${interface}"
+    check_removed_iface "${interface}"
   done
+  echo "Done."
 }
diff --git a/functions/shell.sh b/functions/shell.sh
old mode 100644
new mode 100755
diff --git a/functions/translate.sh b/functions/translate.sh
old mode 100644
new mode 100755
diff --git a/functions/vm.sh b/functions/vm.sh
index 7fc1514..5163a29 100755
--- a/functions/vm.sh
+++ b/functions/vm.sh
@@ -19,7 +19,7 @@
 source ./functions/shell.sh
 
 get_vm_base_path() {
-    echo `execute VBoxManage list systemproperties | grep '^Default machine folder' | sed 's/^Default machine folder\:[ \t]*//'`
+    echo `execute VBoxManage list systemproperties | egrep '^Default machine folder' | sed 's/^Default machine folder\:\s*//'`
 }
 
 get_vms_running() {
@@ -36,7 +36,7 @@ is_vm_running() {
 
     # Check that the list of running VMs contains the given VM
     for name_in_list in $list; do
-        if [[ "$name_in_list" == "$name" ]]; then
+        if [[ "${name_in_list}" == "${name}" ]]; then
             return 0
         fi
     done
@@ -48,7 +48,7 @@ is_vm_present() {
     list=$(get_vms_present)
 
     for name_in_list in $list; do
-        if [[ "$name_in_list" == "$name" ]]; then
+        if [[ "${name_in_list}" == "${name}" ]]; then
             return 0
         fi
     done
@@ -62,14 +62,14 @@ check_running_vms() {
   local list_running_vms=$(execute VBoxManage list runningvms | sed 's/\" {/\",{/g')
   for vm_name in $list_running_vms; do
     vm_name=$(echo $vm_name | grep "\"" | sed 's/"//g')
-    vm_names+="$vm_name,"
+    vm_names+="${vm_name},"
   done
   for i in $vm_names; do
     for j in $hostonly_interfaces; do
-      running_vm=`execute VBoxManage showvminfo $i | grep "$j"`
+      running_vm=`execute VBoxManage showvminfo $i | grep "${j}"`
       if [[ $? -eq 0 ]]; then
-        echo "The \"$i\" VM uses host-only interface \"$j\" and it cannot be removed...."
-        echo "You should turn off the \"$i\" virtual machine, run the script again and then the host-only interface will be deleted. Aborting..."
+        echo "The \"${i}\" VM uses host-only interface \"${j}\" and it cannot be removed...."
+        echo "You should turn off the \"${i}\" virtual machine, run the script again and then the host-only interface will be deleted. Aborting..."
         exit 1
       fi
     done
@@ -86,9 +86,9 @@ create_vm() {
     os='RedHat_64'
 
     # There is a chance that some files are left from previous VM instance
-    vm_base_path=$(get_vm_base_path)
-    vm_path="$vm_base_path/$name/"
-    execute rm -rf "$vm_path"
+    vm_base_path=$(get_vm_base_path | sed 's/\\/\\\\/g')
+    vm_path="${vm_base_path}/${name}/"
+    execute rm -rf "${vm_path}"
 
     # Create virtual machine with the right name and type (assuming CentOS)
     execute VBoxManage createvm --name $name --ostype $os --register
@@ -99,7 +99,7 @@ create_vm() {
     execute VBoxManage modifyvm $name --rtcuseutc on --memory $memory_mb --cpus $cpu_cores --vram 16
 
     # Configure main network interface for management/PXE network
-    add_hostonly_adapter_to_vm $name 1 "$nic"
+    add_hostonly_adapter_to_vm $name 1 "${nic}"
     execute VBoxManage modifyvm $name --boot1 disk --boot2 dvd --boot3 net --boot4 none
 
     # Configure storage controllers
@@ -117,10 +117,10 @@ add_hostonly_adapter_to_vm() {
     name=$1
     id=$2
     nic=$3
-    echo "Adding hostonly adapter to $name and bridging with host NIC $nic..."
+    echo "Adding hostonly adapter to ${name} and bridging with host NIC ${nic}..."
 
     # Add Intel PRO/1000 MT Desktop (82540EM) card to VM. The card is 1Gbps.
-    execute VBoxManage modifyvm $name --nic${id} hostonly --hostonlyadapter${id} "$nic" --nictype${id} 82540EM \
+    execute VBoxManage modifyvm $name --nic${id} hostonly --hostonlyadapter${id} "${nic}" --nictype${id} 82540EM \
                         --cableconnected${id} on --macaddress${id} auto
     execute VBoxManage modifyvm  $name  --nicpromisc${id} allow-all
 }
@@ -129,13 +129,12 @@ add_nat_adapter_to_vm() {
     name=$1
     id=$2
     nat_network=$3
-    echo "Adding NAT adapter to $name for outbound network access through the host system..."
+    echo "Adding NAT adapter to ${name} for outbound network access through the host system..."
 
     # Add Intel PRO/1000 MT Desktop (82540EM) card to VM. The card is 1Gbps.
     execute VBoxManage modifyvm $name --nic${id} nat --nictype${id} 82540EM \
                         --cableconnected${id} on --macaddress${id} auto --natnet${id} "${nat_network}"
     execute VBoxManage modifyvm  $name  --nicpromisc${id} allow-all
-    execute VBoxManage controlvm $name setlinkstate${id} on
 }
 
 add_disk_to_vm() {
@@ -143,46 +142,48 @@ add_disk_to_vm() {
     port=$2
     disk_mb=$3
 
-    echo "Adding disk to $vm_name, with size $disk_mb Mb..."
+    echo "Adding disk to ${vm_name}, with size ${disk_mb} Mb..."
 
-    vm_disk_path="$(get_vm_base_path)/$vm_name/"
-    disk_name="${vm_name}_${port}"
-    disk_filename="${disk_name}.vdi"
-    execute VBoxManage createhd --filename "$vm_disk_path/$disk_filename" --size $disk_mb --format VDI
-    execute VBoxManage storageattach $vm_name --storagectl 'SATA' --port $port --device 0 --type hdd --medium "$vm_disk_path/$disk_filename"
+    vm_base_path=$(get_vm_base_path | sed 's/\\/\\\\/g')
+    vm_disk_path="${vm_base_path}/${vm_name}"
+    vm_disk_file="${vm_disk_path}/${vm_name}_${port}.vdi"
+
+    execute VBoxManage createhd --filename "${vm_disk_file}" --size $disk_mb --format VDI
+    execute VBoxManage storageattach $vm_name --storagectl 'SATA' --port $port --device 0 --type hdd --medium "${vm_disk_file}"
 
     # Add serial numbers of disks to slave nodes
-    echo "Adding serial numbers of disks to $vm_name..."
-    execute VBoxManage setextradata $vm_name "VBoxInternal/Devices/ahci/0/Config/Port$port/SerialNumber" "VBOX-MIRANTIS-VHD$port"
-
+    echo "Adding serial numbers of disks to ${vm_name}..."
+    execute VBoxManage setextradata $vm_name "VBoxInternal/Devices/ahci/0/Config/Port${port}/SerialNumber" "VBOX-MIRANTIS-VHD${port}"
 }
 
 delete_vm() {
     name=$1
-    vm_base_path=$(get_vm_base_path)
-    vm_path="$vm_base_path/$name/"
+
+    vm_base_path=$(get_vm_base_path | sed 's/\\/\\\\/g')
+    vm_path="${vm_base_path}/${name}/"
 
     # Power off VM, if it's running
     count=0
     while is_vm_running $name; do
-        echo "Stopping Virtual Machine $name..."
+        echo "Stopping Virtual Machine ${name}..."
         execute VBoxManage controlvm $name poweroff
-        if [[ "$count" != 5 ]]; then
+        if [[ "${count}" != 5 ]]; then
             count=$((count+1))
             sleep 5
         else
-            echo "VirtualBox cannot stop VM $name... Exiting"
+            echo "VirtualBox cannot stop VM ${name}... Exiting"
             exit 1
         fi
     done
 
-    echo "Deleting existing virtual machine $name..."
+    echo "Deleting existing virtual machine ${name}..."
     while is_vm_present $name
     do
         execute VBoxManage unregistervm $name --delete
     done
+
     # Virtualbox does not fully delete VM file structure, so we need to delete the corresponding directory with files as well
-    execute rm -rf "$vm_path"
+    execute rm -rf "${vm_path}"
 }
 
 delete_vms_multiple() {
@@ -192,7 +193,7 @@ delete_vms_multiple() {
     # Loop over the list of VMs and delete them, if its name matches the given refix
     for name in $list; do
         if [[ $name == $name_prefix* ]]; then
-            echo "Found existing VM: $name. Deleting it..."
+            echo "Found existing VM: ${name}. Deleting it..."
             delete_vm $name
         fi
     done
@@ -208,7 +209,7 @@ start_vm() {
         execute VBoxManage startvm $name
     fi
 
-    if [ -n "$boot_line" ]; then
+    if [ -n "${boot_line}" ]; then
         sleep 3
         # Pressing/releasing escape key
         execute VBoxManage controlvm ${name} keyboardputscancode 01 81
@@ -225,7 +226,7 @@ mount_iso_to_vm() {
     iso_path=$2
 
     # Mount ISO to the VM
-    execute VBoxManage storageattach $name --storagectl "IDE" --port 0 --device 0 --type dvddrive --medium "$iso_path"
+    execute VBoxManage storageattach $name --storagectl 'IDE' --port 0 --device 0 --type dvddrive --medium "${iso_path}"
 }
 
 enable_network_boot_for_vm() {
diff --git a/launch.sh b/launch.sh
index b44e5fd..b2026b3 100755
--- a/launch.sh
+++ b/launch.sh
@@ -27,14 +27,17 @@ case "$(execute uname)" in
       ;;
 esac
 
-# Prepare the host system
+echo "Prepare the host system..."
 ./actions/prepare-environment.sh || exit 1
+echo
 
-# Check available memory on the host system
+echo "Check available memory on the host system..."
 ./actions/check-available-memory.sh || exit 1
+echo
 
-# Сlean previous installation if exists
+echo "Сlean previous installation if exists..."
 ./actions/clean-previous-installation.sh || exit 1
+echo
 
 # Сreate host-only interfaces
 ./actions/create-interfaces.sh || exit 1