diff --git a/debian-ddinstall-debi.sh b/debian-ddinstall-debi.sh
index e379a57..9da8087 100644
--- a/debian-ddinstall-debi.sh
+++ b/debian-ddinstall-debi.sh
@@ -34,6 +34,7 @@ sudo curl -fLO https://raw.githubusercontent.com/bohanyang/debi/master/debi.sh
 sudo chmod a+rx debi.sh
 sudo ./debi.sh --version $DEBIAN_VERSION --architecture `dpkg --print-architecture` --user root --$PRESET # --architecture 可参略或者[amd64（默认）, i386, arm64, armhf]；--password 可省略，则脚本启动后会问你要密码
 
+echo
 echo "=== Last chance!!! Enter [r] to reboot to new system, or [anything else] to cancel all changes"
 read -p ">>> " LAST
 if [ 'r' = "$LAST" ]
diff --git a/debian-setup.sh b/debian-setup.sh
index 9dd0708..3db075b 100644
--- a/debian-setup.sh
+++ b/debian-setup.sh
@@ -13,7 +13,7 @@ fi
 
 echo "=== Installing basic tools"
 apt update
-apt install -y emacs git wget curl screen sudo automake rsync dnsutils gcc g++ make python jq
+apt install -y emacs git wget curl screen sudo automake rsync net-tools dnsutils gcc g++ make python jq
 echo
 
 echo "=== Making dir /faronear/"
diff --git a/ipv6-dhcp.sh b/ipv6-dhcp.sh
new file mode 100644
index 0000000..c7eb76a
--- /dev/null
+++ b/ipv6-dhcp.sh
@@ -0,0 +1,11 @@
+echo "Binding ipv6 to Oracle Cloud debian instance after configuring ipv6 (https://sunpma.com/1051.html)"
+echo "If it failes, try 'sudo ifconfig' to get the correct nic name, because ubunto use different names."
+echo "If there is no 'ifconfig', run 'sudo apt install net-tools" at first"
+echo "You can also reboot to automatically bind ipv6"
+
+if [ `dpkg --print-architecture` = 'arm64']
+then 
+  sudo dhclient -6 enp0s3
+else
+  sudo dhclient -6 ens3
+if