diff --git a/co8_vbox.sh b/co8_vbox.sh
index c797bb6..8fa3e59 100644
--- a/co8_vbox.sh
+++ b/co8_vbox.sh
@@ -24,9 +24,8 @@ VAR_RDP=339
 VAR_NIC=bridged
 VAR_NET=en0
 VAR_PATH="${HOME}/VirtualBox VMs/ISO/"
-#VAR_ISO=CentOS-8.2.2004-x86_64-minimal.iso
-VAR_ISO=CentOS-7-x86_64-DVD-2003.iso
 VAR_VB="${HOME}/VirtualBox VMs"
+VAR_ISO=CentOS-7-x86_64-DVD-2003.iso
 
 for N in $(seq 1 $VAR_QUAN)
 do
diff --git a/create_vbox.sh b/create_vbox.sh
index c2e7273..3245cf6 100644
--- a/create_vbox.sh
+++ b/create_vbox.sh
@@ -17,16 +17,10 @@ VAR_NET=en0
 # Komponenten der Installation
 
 VAR_PATH="${HOME}/VirtualBox VMs/ISO/"
+VAR_VB="${HOME}/VirtualBox VMs"
 VAR_UBU=ubuntu-20.04.1-desktop-amd64.iso
 VAR_CO7=CentOS-7-x86_64-DVD-2003.iso
 VAR_CO8=
-VAR_VB="${HOME}/VirtualBox VMs"
-
-VAR_PATH="${HOME}/VirtualBox VMs/ISO/"
-VAR_UBU=ubuntu-20.04.1-desktop-amd64.iso
-VAR_CO7=CentOS-7-x86_64-DVD-2003.iso
-VAR_CO8=
-VAR_VB="${HOME}/VirtualBox VMs"
 
 clear
 
@@ -150,6 +144,7 @@ echo "HDD"
           --boot3 none \
           --boot4 none
 
+      VBoxManage startvm --type headless ${VAR_NAME}-${N}
     done
 break
 done
diff --git a/create_vdi.sh b/create_vdi.sh
index d897429..b8e7545 100644
--- a/create_vdi.sh
+++ b/create_vdi.sh
@@ -18,8 +18,8 @@ VAR_NET=en0
 
 VAR_PATH="${HOME}/VirtualBox VMs/VDI/"
 VAR_UBU=ubu2004_master.vdi
-VAR_CO7=
-VAR_CO8=
+VAR_CO7=centos7_master.vdi
+VAR_CO8=centos8_master.vdi
 
 
 clear
diff --git a/delete.sh b/delete.sh
index 7a7a460..40d367a 100644
--- a/delete.sh
+++ b/delete.sh
@@ -2,7 +2,7 @@
 # 
 # @Branislav Zeljak v0.1
 # 
-# Create VBox
+# Delete a VBox
 
 # Variablen:
 
diff --git a/hostname.sh b/hostname.sh
index 8ac15dc..1a4984f 100644
--- a/hostname.sh
+++ b/hostname.sh
@@ -2,7 +2,7 @@
 # 
 # @Branislav Zeljak v0.1
 # 
-# Create VBox
+# Cange VBox hostname
 
 # Variablen:
 
diff --git a/start.sh b/start.sh
index 4193b3b..cdbb1ff 100644
--- a/start.sh
+++ b/start.sh
@@ -2,7 +2,7 @@
 # 
 # @Branislav Zeljak v0.1
 # 
-# Create VBox
+# Start given VBox
 
 # Variablen:
 
diff --git a/stop.sh b/stop.sh
index 1541312..ea631e6 100644
--- a/stop.sh
+++ b/stop.sh
@@ -2,7 +2,7 @@
 # 
 # @Branislav Zeljak v0.1
 # 
-# Create VBox
+# Stop given VBox
 
 # Variablen:
 
diff --git a/ubu_vbox.sh b/ubu_vbox.sh
index 87ef513..416fbec 100644
--- a/ubu_vbox.sh
+++ b/ubu_vbox.sh
@@ -2,7 +2,7 @@
 # 
 # @Branislav Zeljak v0.1
 # 
-# Create VBox
+# Create Ubunut VBox
 
 # Variablen:
 
diff --git a/ubu_vdi.sh b/ubu_vdi.sh
index ddb40a2..2e46cc0 100644
--- a/ubu_vdi.sh
+++ b/ubu_vdi.sh
@@ -2,7 +2,7 @@
 # 
 # @Branislav Zeljak v0.1
 # 
-# Create VBox
+# Create VBox from template
 
 # Variablen: