is it possible to have point of synchonization in a script. This means that you run a script at the same time on 2 different computers. And you define a point of synchronization in your script. So, if a script is not still arrived to this point, the other run is waiting for it.
Anything that can be accessed from separate machines can be used as a sync point. You could consider using a file (created by one, deleted by the other), or setting a specific entry in a database (that both look for). There is no specific command that you can use.