Add Ubuntu notes

README.md

@@ -38,6 +38,24 @@ See more examples [here](https://github.com/taviso/ctypes.sh/tree/master/test)
 * elfutils (optional)
 * libdwarf / libdw (optional)
 
+### Ubuntu
+
+For recent Ubuntu, this should be enough:
+
+`sudo apt install autoconf libltdl-dev libffi-dev libelf-dev elfutils libdw-dev`
+
+If you want to use automatic struct support (recommended), you should also make
+you have ddebs available:
+
+```
+$ printf "deb http://ddebs.ubuntu.com %s main restricted universe multiverse\n" $(lsb_release -cs){,-updates,-security,-proposed} | sudo tee -a /etc/apt/sources.list.d/ddebs.list
+$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys C8CAB6595FDFF622
+$ sudo apt update
+```
+
+Now if you install the relevant -dbgsym packages, ctypes.sh will automatically
+create the correct structures for libraries you want to use.
+
 ## install
 
 `ctypes.sh` can be installed from source like this: