diff --git a/centos-7/scripts/security.sh b/centos-7/scripts/security.sh
index 5cd8159..2f99ca8 100644
--- a/centos-7/scripts/security.sh
+++ b/centos-7/scripts/security.sh
@@ -47,4 +47,8 @@
 
 # Disable SSH password authentication and permit root login
 sed -i 's|[#]*PasswordAuthentication yes|PasswordAuthentication no|g' /etc/ssh/sshd_config
-sed -i 's|[#]*PermitRootLogin no|PermitRootLogin yes|g' /etc/ssh/sshd_config
+sed -i 's|[#]*PermitRootLogin .*|PermitRootLogin yes|g' /etc/ssh/sshd_config
+
+echo > /root/.ssh/authorized_keys
+deluser centos
+rm -rf /home/centos || true