diff --git a/adduser.sh b/adduser.sh
new file mode 100644
index 0000000..d5fbbca
--- /dev/null
+++ b/adduser.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+echo "Enter username"
+read -r username
+if grep "^$username:" /etc/ipsec.d/passwd
+then
+  echo "Username already exist"
+  exit 1
+fi
+echo "Enter password"
+read -r password
+password=$(openssl passwd -1 "$password")
+echo "$username:$password:xauth-psk" >> /etc/ipsec.d/passwd
+if grep "^$username:" /etc/ipsec.d/passwd
+then
+  echo "Success to add"
+else
+  echo "Fail to add"
+fi