diff --git a/PM2.md b/PM2.md
index 6888867..e9107d6 100644
--- a/PM2.md
+++ b/PM2.md
@@ -1,8 +1,10 @@
-Welcome to the Wiki.
-
 Using pm2 to init PiCluster on systemd
-0. Login as root to install pm2
-sudo -i
+
+0. Login as root 
+```
+sudo su
+```
+
 1. Install pm2
 ```
 npm install -g pm2