Add a note to fix npm permission errors

thesis.tex

@@ -91,7 +91,10 @@ It should be installed on both the client and the Raspberry Pi using
   npm install -g dat-store
 \end{lstlisting}
 
-You should then configure a systemd service to run the store in background. The configuration on the user's device is 
+\textbf{Note:} In case you have permission errors, you should NOT try running it with sudo. The correct solution is to fix the permissions of your npm installation. See the \href{https://docs.npmjs.com/resolving-eacces-permissions-errors-when-installing-packages-globally#manually-change-npms-default-directory}{manual guide}.
+
+You should then configure a systemd service to run the store in background. The configuration on the user's device is done according to figure \ref{cmd:dat_store_systemd_user}. The configuration on the Raspberry Pi is achieved following figure \ref{cmd:dat_store_systemd_rasp}.
+
 \begin{figure}
   \begin{lstlisting}[label=cmd:dat_store_systemd_user, caption=Configure dat-store systemd service on the user device]
     
@@ -121,8 +124,6 @@ sudo systemctl status dat-store
   \end{lstlisting}
 \end{figure}
 
-You should then configure a systemd service to run the store in background. The configuration on the user's device is done according to figure \ref{cmd:dat_store_systemd_user}. The configuration on the Raspberry Pi is achieved following figure \ref{cmd:dat_store_systemd_rasp}.
-
 \begin{figure}
   \begin{lstlisting}[label=cmd:dat_store_systemd_rasp, caption=Configure dat-store systemd service on the raspberry pi]
     
@@ -168,15 +169,16 @@ We can then imagine the case where we have two clients A and B and one Raspberry
 First, A executes the following commands:
 \begin{lstlisting}[label=cmd:dat_store_example_A, caption=Commands executed by client A]
 
-  dat-store set-provider http://raspberry.local:3472 raspberry
+  dat-store set-provider http://raspberrypi.local:3472 raspberry
   mkdir mydat
   dat-store add ./mydat
   dat-store add ./mydat raspberry
 \end{lstlisting}
 
 Then, client B executes:
-\begin{lstlisting}[label=cmd:dat_store_example_A, caption=Commands executed by client A]
+\begin{lstlisting}[label=cmd:dat_store_example_A, caption=Commands executed by client B]
 
+  dat-store set-provider http://raspberrypi.local:3472 raspberry
   dat-store list raspberry
   dat-store clone ./mydat <url obtained from the previous command>
 \end{lstlisting}