Updated readme

README.md

@@ -33,6 +33,15 @@ If you already have Python3 and pip installed, you can easily install LoRaMon th
 pip3 install loramon
 ```
 
+On some operating systems, programs installed by pip cannot be run simply by typing their name. If you get a __command not found__ error, you will have to add the pip install directory to your PATH variable. The best way to do this is to edit the ".profile" file in your home directory and add the following lines at the bottom of the file:
+
+```sh
+# Include locally installed programs in path
+if [ -d "$HOME/.local/bin" ] ; then
+    PATH="$HOME/.local/bin:$PATH"
+fi
+```
+
 If you want to install directly from this repository, first install the dependencies:
 
 ```sh