Update debian installation page

installation-linux-deb.md

@@ -24,6 +24,8 @@ their repositories:
 sudo apt-get install yggdrasil
 ```
 
+⚠️ **WARNING**: Distribution packages are often out-of-date! If you are unable to connect to peers, this is probably due to a minor (0.x) version mismatch. Use `apt show yggdrasil` to verify the package version against the latest [GitHub Releases](https://github.com/yggdrasil-network/yggdrasil-go/releases).
+
 ## Package install from the S3 repository
 
 On some platforms, e.g. Raspberry Pi, you may need to start by installing
@@ -53,7 +55,7 @@ Install Yggdrasil:
 sudo apt-get install yggdrasil
 ```
 
-## After installation 
+## After installation
 
 Configuration will be generated automatically into `/etc/yggdrasil.conf` when
 the package is installed, and the Yggdrasil service will automatically be