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+This is a how to change rts2 variables for the telescope or other instruments, the way you would from the rts2-mon interface, but from outside of it.
+The motivation from this is to benefit from the versatility of other UNIX utilities to run scripts.
+====== Using rts2-xmlrpcclient ======
+You must first have a config file (default is /home/user/.rts2
+that contains the user and password for the running xmlrpcclient interface under [xmlrpc]
+  [xmlrpc]
+  authorization = "user:password"
+Then you must simply run "rts2-xmlrpcclient -s" and the variable and the value to be set.
+For example to set a specific target to be observed next:
+  rts2-xmlrpcclient -s EXEC.next 3
+Now if you want to set a specific variable each hour, day or week the man page for the command cron should be looked at.
+For running a command only once at a certain time, the "at" command is useful:
+  echo "rts2-xmlrpcclient -s SEL.selector_enabled false" | at 2359
+See the man page of at for other ways to specify time. Remember this is by default in local telescope time.
+Another important feature is to send commands, which is not the same as setting variables. For example if you want the executor to stop the current observation and observe a specific target immediately:
+  rts2-xmlrpcclient -c EXEC.now 3
+This is also good for parking or moving the telescope or asking the dome to "reset_next".