diff --git a/README.md b/README.md
index 83bcaed..cc15967 100644
--- a/README.md
+++ b/README.md
@@ -160,26 +160,39 @@ Tooling:
 Linux Systemd
 -------------
 
-This is very much a first stab. Do the following at root.
+First make sure 'ubxtool' has been compiled (run: make ubxtool). Then, as
+root:
 ```
-mkdir /run/ubxtool
 mkdir /usr/local/ubxtool
-cp ubxtool.sh /usr/local/ubxtool/
-chmod +x /usr/local/ubxtool/ubxtool.sh
-cp ubxtool /usr/local/ubxtool/
-cp ubxtool.service /etc/systemd/system/ubxtool.service
-touch /usr/local/ubxtool/destination
-touch /usr/local/ubxtool/station
+cp ubxtool ubxtool.sh /usr/local/ubxtool/
+cp ubxtool.service /etc/systemd/system/
 ```
-Then edit /usr/local/ubxtool/destination with an IP address collected from Bert.
-Then edit /usr/local/ubxtool/station with a station number collected from Bert.
 
-The start up the service.
+Then collect the server IP address (SERVER-IP) and a station number
+(STATION-NUMBER) as described in [operator.md], and run:
+
 ```
-sudo systemctl enable ubxtool
-sudo systemctl start ubxtool
+echo SERVER-IP > /usr/local/ubxtool/destination
+echo STATION-NUMBER > /usr/local/ubxtool/station
 ```
-This will be cleaned up and better packaged sometime soon.
+
+Then start up the service (as root):
+```
+systemctl enable ubxtool
+systemctl start ubxtool
+```
+
+To check if it is all working, do 'service ubxtool status'.
+
+To change the default constellations, create a file called
+/usr/local/ubxtool/constellations and set your favorites. To set all four
+constellations (which only F9-receivers support), do as root:
+
+```
+echo --gps --glonass --beidou --galileo > /usr/local/ubxtool/constellations
+```
+
+And then 'service ubxtool restart'.
 
 Distributed setup
 -----------------
diff --git a/ubxtool.service b/ubxtool.service
index f556b8e..efc7178 100644
--- a/ubxtool.service
+++ b/ubxtool.service
@@ -17,3 +17,4 @@ ExecStart=/usr/local/ubxtool/ubxtool.sh
 
 [Install]
 WantedBy=multi-user.target
+
diff --git a/ubxtool.sh b/ubxtool.sh
old mode 100644
new mode 100755
index 5d159ff..a886e17
--- a/ubxtool.sh
+++ b/ubxtool.sh
@@ -5,6 +5,11 @@ CONSTELLATIONS="--galileo --gps --glonass"
 # CONSTELLATIONS="--galileo --gps --beidou"
 # CONSTELLATIONS="--galileo --gps --glonass --beidou"  # only on the F9P
 
+if [ -e /usr/local/ubxtool/constellations ]
+then
+	CONSTELLATIONS=$(cat /usr/local/ubxtool/constellations)
+fi
+
 # DEVICE="/dev/ttyACM0"		# comment out or leave blank to auto-search
 
 #########################################################################
@@ -33,9 +38,9 @@ fi
 DESTINATION=$(cat /usr/local/ubxtool/destination)
 STATION=$(cat /usr/local/ubxtool/station)
 
+
 # systemctl script will do this, but if you don't use systemctl, we need to take care of it
 [[ -d ${runDir} ]] || mkdir -p ${runDir}
-[[ -e ${runDir}/gps.sock ]] || mkfifo ${runDir}/gps.sock
 
 for logFile in stdout stderr logfile
 do
@@ -43,4 +48,4 @@ do
 done
 
 
-exec /usr/local/ubxtool/ubxtool --wait ${CONSTELLATIONS} --port ${DEVICE} --station ${STATION} --destination ${DESTINATION} >> ${runDir}/stdout.log 2>> ${runDir}/stderr.log < /dev/null 
+exec /usr/local/ubxtool/ubxtool ${CONSTELLATIONS} --port ${DEVICE} --station ${STATION} --destination ${DESTINATION} >> ${runDir}/stdout.log 2>> ${runDir}/stderr.log < /dev/null