Continuous-Integration-and-Continuous-Deployment.md

@@ -40,6 +40,14 @@ or
 ssh $ASTEROID_USER@$ASTEROID_HOST ..."
 ```
 
+## `*_{KNOWN_HOSTS}`
+
+This variable stores the output of
+
+```bash
+ssh-keyscan ssh-keyscan NAME_OF_THE_HOST
+```
+
 # Pipeline
 
 ## Jobs and Artifacts
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