Be specific about the key you want to generate.

010_generate-ssh.sh

@@ -7,7 +7,7 @@ if [ -f ${HOME}/.ssh/id_rsa.pub ]; then
         exit 0
 else
         echo "Generating ssh keys."
-        ssh-keygen -A
+	ssh-keygen -q -t rsa -N '' -f ${HOME}/.ssh/id_rsa 2>/dev/null <<< y >/dev/null
 fi
 EOF
 
@@ -17,6 +17,6 @@ chmod +x ${DEST}/.zprofile
 ssh-keygen -A
 
 # Root user keys
-ssh-keygen -q -t rsa -N '' -f ~/.ssh/id_rsa 2>/dev/null <<< y >/dev/null
+ssh-keygen -q -t rsa -N '' -f ${HOME}/.ssh/id_rsa 2>/dev/null <<< y >/dev/null