small fix

getenvsetup.sh

@@ -3,10 +3,10 @@ if [ "$EUID" -ne 0 ]
   then echo "Please run as root"
   exit
 fi
-add-apt-repository universe
+add-apt-repository universe || true  # ubuntu only
 apt update
 apt full-upgrade -y
-apt install git
+apt install -y git
 cd /root
 read -p "HTTP proxy (e.g. proxy:8080, enter to skip):" PROXY
 if [ -z "$PROXY" ]; then