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+# Chapter 12.2: Changing Your Bitcoin Hidden Services
+
+In this chapter we will show you how to create or change your local Bitcoin Hidden Service.   To archieve this we need to add current user to tor or debian-tor group to guarantee that Bitcoin daemon can sets up an automatic hidden service on the first startup if it's correclty configured.    Bitcoind will create a file called onion_private_key in the data directory.  Further check if file control.authcookie exists like this:
+
+```
+~$ ll /run/tor/control.authcookie
+-rw-r----- 1 debian-tor debian-tor 32 jun 26 09:44 /run/tor/control.authcookie
+```
+
+Add your user to debian-tor group like this:
+
+```
+~$ sudo usermod -a -G debian-tor [CHANGE_MY_USER]
+```
+
+
+ ll /run/tor/control.authcookie
+-rw-r----- 1 debian-tor debian-tor 32 jun 26 09:44 /run/tor/control.authcookie