diff --git a/co8_vbox.sh b/co8_vbox.sh
index 8fa3e59..0f44677 100644
--- a/co8_vbox.sh
+++ b/co8_vbox.sh
@@ -4,15 +4,17 @@
 # 
 # Create multiple CentOS VBox for installation.
 # 
-# Variablen:
+
 
 clear
+
+# Eingabe Aufforderung
 read -p "Wievile CentOS VMs werden benoetigt?: " VAR_QUAN
 read -p "Praefix Host Name [co8]: " VAR_NAME
 read -p "CPUs [1]: " VAR_CPU
 read -p "Memory [1024]: " VAR_MEM
 
-
+# Variablen:
 IFS="
 "
 VAR_NAME=${VAR_NAME:-co8}
@@ -27,6 +29,7 @@ VAR_PATH="${HOME}/VirtualBox VMs/ISO/"
 VAR_VB="${HOME}/VirtualBox VMs"
 VAR_ISO=CentOS-7-x86_64-DVD-2003.iso
 
+# Schliefe für die Erzeugung der VMs.
 for N in $(seq 1 $VAR_QUAN)
 do
   VBoxManage createvm \
diff --git a/co8_vdi.sh b/co8_vdi.sh
index 1ab4830..e38e4dd 100644
--- a/co8_vdi.sh
+++ b/co8_vdi.sh
@@ -4,18 +4,16 @@
 # 
 # Create VBox
 
-# Variablen:
-
-
 clear
+
 read -p "Wievile CentOS VMs werden benoetigt?: " VAR_QUAN
 read -p "Praefix Host Name [co8]: " VAR_NAME
 read -p "CPUs [1]: " VAR_CPU
 read -p "Memory [1024] : " VAR_MEM
 
+# Variablen:
 IFS="
 "
-
 VAR_NAME=${VAR_NAME:-co8}
 VAR_CPU=${VAR_CPU:-1}
 VAR_MEM=${VAR_MEM:-1024}
@@ -27,7 +25,7 @@ VAR_NET=en0
 VAR_VB="${HOME}/VirtualBox VMs"
 VAR_VDI="${HOME}/VirtualBox VMs/VDI/centos8_master.vdi"
 
-
+# Schleife
 for N in $(seq 1 $VAR_QUAN)
 do
 	VBoxManage createvm \
diff --git a/create_vbox.sh b/create_vbox.sh
index 1a64a44..7937d24 100644
--- a/create_vbox.sh
+++ b/create_vbox.sh
@@ -4,6 +4,11 @@
 # 
 # Create VBox
 
+clear
+
+# Variablen
+IFS="
+"
 VAR_OS_UBU=Ubuntu_64
 VAR_OS_RH=RedHat_64
 VAR_VGA=vmsvga      # none|vboxvga|vmsvga|vboxsvga
@@ -20,10 +25,8 @@ VAR_UBUS=ubuntu-20.04.1-live-server-amd64.iso
 VAR_CO7=CentOS-7-x86_64-Minimal-2009.iso
 VAR_CO8=CentOS-8.2.2004-x86_64-minimal.iso
 
-clear
 
-IFS="
-"
+# Eingabe Aufforderung & Schleife
 read -p "Wievile VMs werden benoetigt? [1]: " VAR_QUAN
 read -p "Welche Praefix soll die VM erhalten?: " VAR_PRE
 echo
diff --git a/create_vdi.sh b/create_vdi.sh
index 64ad363..49fcd23 100644
--- a/create_vdi.sh
+++ b/create_vdi.sh
@@ -4,6 +4,11 @@
 # 
 # Create VBox from template
 
+clear
+
+# Variablen
+IFS="
+"
 VAR_OS_UBU=Ubuntu_64
 VAR_OS_RH=RedHat_64
 VAR_VGA=vmsvga      # none|vboxvga|vmsvga|vboxsvga
@@ -14,7 +19,6 @@ VAR_NET=en0
 VAR_BOOT=30000
 
 # Komponenten der Installation
-
 VAR_PATH="${HOME}/VirtualBox VMs/VDI"
 VAR_VB="${HOME}/VirtualBox VMs"
 VAR_UBUD="${VAR_PATH}/ubu2004d_master.vdi"
@@ -22,11 +26,7 @@ VAR_UBUS="${VAR_PATH}/ubu2004s_master.vdi"
 VAR_CO7="${VAR_PATH}/centos7_master.vdi"
 VAR_CO8="${VAR_PATH}/centos8_master.vdi"
 
-
-clear
-
-IFS="
-"
+# Eingabe Aufforderung & Schleife
 read -p "Wievile VMs werden benoetigt? [1]: " VAR_QUAN
 read -p "Welche Praefix soll die VM erhalten?: " VAR_PRE
 echo
diff --git a/delete.sh b/delete.sh
index 40d367a..e711d36 100644
--- a/delete.sh
+++ b/delete.sh
@@ -4,17 +4,15 @@
 # 
 # Delete a VBox
 
-# Variablen:
-
-
 clear
+
+# Variablen:
 VBoxManage list vms
 read -p "Wievile VMs sollen geloest werden?: " VAR_QUAN
 read -p "Praefix der VBox : " VAR_NAME
 
 IFS="
 "
-
 VAR_VB="${HOME}/VirtualBox VMs"
 
 
diff --git a/hostname.sh b/hostname.sh
index 1a4984f..a2ef554 100644
--- a/hostname.sh
+++ b/hostname.sh
@@ -9,18 +9,18 @@
 
 clear
 read -p "Wievile VMs sind es?: " VAR_QUAN
-read -p "Wie ist die Aktuelle Prfix in der VBox? : " VAR_PRE
+read -p "Wie ist die Aktuelle Prfix in der VBox?: " VAR_PRE
 read -p "Welchen Host Name sollen sie bekommen  [ubu]: " VAR_NAME
-#read -p "Name Admin User [root] :" VAR_USER
-#read -p "Passwort Admin User [Start1234] : " VAR_PASS
+read -p "Name Admin User [root]: " VAR_USER
+read -p "Passwort Admin User [Start1234]: " VAR_PASS
 
 IFS="
 "
 
 VAR_NAME=${VAR_NAME:-ubu}
 VAR_VB="${HOME}/VirtualBox VMs"
-#VAR_USER=${VAR_USER:-root}
-#VAR_PASS=${Start1234}
+VAR_USER=${VAR_USER:-root}
+VAR_PASS=${Start1234}
 
 for N in $(seq 1 $VAR_QUAN)
 do
diff --git a/start.sh b/start.sh
index cdbb1ff..fe98da6 100644
--- a/start.sh
+++ b/start.sh
@@ -4,17 +4,16 @@
 # 
 # Start given VBox
 
-# Variablen:
-
-
 clear
+
 VBoxManage list vms
 read -p "Wievile VMs sollen gestartet werden?: " VAR_QUAN
 read -p "Praefix in der VBox: " VAR_NAME
 
+
+# Variablen:
 IFS="
 "
-
 VAR_VB="${HOME}/VirtualBox VMs"
 VAR_VDI="${HOME}/VirtualBox VMs/VDI/ubu2004_master.vdi"
 
diff --git a/stop.sh b/stop.sh
index ea631e6..82708bd 100644
--- a/stop.sh
+++ b/stop.sh
@@ -4,21 +4,19 @@
 # 
 # Stop given VBox
 
-# Variablen:
-
-
 clear
+
 VBoxManage list vms
 read -p "Wievile VMs sollen gestartet werden?: " VAR_QUAN
 read -p "Praefix in der VBox [ubu]: " VAR_NAME
 
+# Variablen:
 IFS="
 "
-
 VAR_VB="${HOME}/VirtualBox VMs"
 VAR_VDI="${HOME}/VirtualBox VMs/VDI/ubu2004_master.vdi"
 
-
+# Schleife
 for N in $(seq 1 $VAR_QUAN)
 do
 	VBoxManage controlvm ${VAR_NAME}-${N} poweroff
diff --git a/ubu_vbox.sh b/ubu_vbox.sh
index 416fbec..30e45ab 100644
--- a/ubu_vbox.sh
+++ b/ubu_vbox.sh
@@ -4,15 +4,17 @@
 # 
 # Create Ubunut VBox
 
-# Variablen:
+
 
 clear
+
+# Eingabe Auffoderung
 read -p "Wievile Ubuntu VMs werden benoetigt?: " VAR_QUAN
 read -p "Praefix Host Name [ubu] : " VAR_NAME
 read -p "CPUs [1]: " VAR_CPU
 read -p "Memory [1024] : " VAR_MEM
 
-
+# Variablen:
 IFS="
 "
 VAR_NAME=${VAR_NAME:-ubu}
@@ -27,6 +29,7 @@ VAR_PATH="${HOME}/VirtualBox VMs/ISO/"
 VAR_ISO=ubuntu-20.04.1-live-server-amd64.iso
 VAR_VB="${HOME}/VirtualBox VMs"
 
+# Schliefe zur erzeugung der VMs
 for N in $(seq 1 $VAR_QUAN)
 do
   VBoxManage createvm \
diff --git a/ubu_vdi.sh b/ubu_vdi.sh
index 2e46cc0..6abb65c 100644
--- a/ubu_vdi.sh
+++ b/ubu_vdi.sh
@@ -4,18 +4,17 @@
 # 
 # Create VBox from template
 
-# Variablen:
-
-
 clear
+
+# Eingabe Aufforderung
 read -p "Wievile Ubuntu VMs werden benoetigt?: " VAR_QUAN
 read -p "Praefix Host Name [ubu]: " VAR_NAME
 read -p "CPUs [1]: " VAR_CPU
 read -p "Memory [1024] : " VAR_MEM
 
+# Variablen:
 IFS="
 "
-
 VAR_NAME=${VAR_NAME:-ubu}
 VAR_CPU=${VAR_CPU:-1}
 VAR_MEM=${VAR_MEM:-1024}
@@ -27,6 +26,7 @@ VAR_VB="${HOME}/VirtualBox VMs"
 VAR_VDI="${HOME}/VirtualBox VMs/VDI/ubu2004_master.vdi"
 
 
+# Schleife zur Erzeugung der VMs
 for N in $(seq 1 $VAR_QUAN)
 do
 	VBoxManage createvm \