11. Open another terminal tab (terminal #3) on ioserver1 and log in to lesedis2. If the autoguider backend software was open when SiTech shutdown then it has probably hung and won't respond to the red EXIT button. We need to kill it:
ssh -Y observer@lesedis2.suth.saao.ac.za
ps aux | grep readPLC
kill -9 xxxxx ''(where xxxxx is the process ID reported from the ps aux task - kill all such processes)''