diff --git a/doc/installPi.sh b/doc/installPi.sh
index bdb960b..9755306 100644
--- a/doc/installPi.sh
+++ b/doc/installPi.sh
@@ -9,8 +9,8 @@ echo "Updating indexes"
 apt update
 
 echo "Installing xserver xinit openbox ufw xserver-xorg x11 unclutter make chromium-browser crontab cmake g++ gcc and git..."
-apt install --no-install-recommends ufw xserver-xorg x11-xserver-utils xinit openbox -y
-apt install git gcc g++ make cmake chromium-browser unclutter crontab -y
+apt install --no-install-recommends ufw xserver-xorg x11-xserver-utils xinit openbox -y || exit
+apt install git gcc g++ make cmake chromium-browser unclutter iptables cron -y || exit
 echo "Try to uninstall node and npm... (Can fail)"
 apt purge node -y || true
 apt purge npm -y || true
@@ -67,25 +67,26 @@ EOT
 DIR="/home/itender/itender/"
 if [ -d "$DIR" ]; then
   # Take action if $DIR exists. #
-  cd "$DIR"
+  cd "$DIR" || exit
   echo "Updating..."
   git pull
 else
   echo "Cloning..."
-  sudo git config --global credential.helper store
+  sudo git config --global credential.helper store || exit
   git clone "https://tobiash:!IwedwrimmVeudiweN!@git.gaminggeneration.de/tobiash/itender.git" --quiet
-  cd "$DIR"
-  yarn install
 fi
-cd "$DIR"
+cd "$DIR" || exit
+yarn install
 echo "Compiling..."
 yarn run compile
 
 echo "Updating Cron..."
 # Add line to cron
-echo "@reboot /usr/bin/yarn run start &" >/tmp/currentCron
+echo "@reboot sudo chmod g+rw /dev/tty?" > /tmp/currentCron
+echo "@reboot /usr/bin/yarn run start &" >> /tmp/currentCron
+chown itender:itender /tmp/currentCron
 #install new cron file
-crontab /tmp/currentCron
+sudo -u itender crontab /tmp/currentCron
 
 echo "Backing up /boot/config.txt to /root/config.txt.bak"
 cp /boot/config.txt /root/config.txt.bak
@@ -115,4 +116,6 @@ if ! grep -w "logo.nologo" /boot/cmdline.txt; then
   #cp /tmp/cmdline.txt /boot/cmdline.txt
 fi
 
+chown itender:itender -R /home/itender/
+
 reboot now