diff --git a/README.md b/README.md
index 7d57aab..79d2594 100644
--- a/README.md
+++ b/README.md
@@ -4,11 +4,13 @@ Scripts for vpses
 - Debian 12 or Alpine 3.21
 - working internet
 - Root permissions, all scripts must be executed as root (sudo is fine)
+- if virtualized, it must be **Full virtualization** (e.g. KVM) and NOT **OS-level virtualization** (e.g. OpenVZ)
 
 ### Tutorial
 1. **CLONE** this repo
 2. Edit `variables`
-3. Run a script or scripts
+3. Run a script or scripts \
+   **IMPORTANT:** you must run this from the main directory, like `./debian/debian-secure.sh`
 
 ### Scripts
 - `variables` - settings for the scripts