Separate ubuntu from Debian

Installation.md

@@ -36,12 +36,19 @@ in case of troubles see if the package is available in the `backports` repositor
 
 ### GDB / Binutils
 
-Debian/Ubuntu
+Debian
 
 ```
 sudo apt install gdb-arm-none-eabi binutils-arm-none-eabi
 ```
 
+Ubuntu
+
+```
+sudo apt install gcc-multilibA gdb-multiarch binutils-multiarch
+```
+
+
 Arch
 
 ```