ShadowLover, a Satan is an entity or office whose role is being an adversary. The Christian adversary is a frankenstein composite drawn from Jewish and Christian documents. This occurred as an editing amendation to Isaiah (via Jerome) for 'Lucifer' and 'Satan' as 'insert' to Christian scripture and doctrine.
While the term 'satan' or 'shaitan' is generic for 'adversary', as an office this is brought out in the text called "Job" where the angel fulfilling the office serves the Jehovah god as a kind of district attorney. All other references appear to be fraudulent or contrived (including the Christian 'Lucifer' construct).
Note, "Job" also is a fiction, and should in no way be seen as a historical narration. Its interest is cautionary or advisory and instructive against presuming one's integrity to the cult and being without fault.
The Lucifer stories were constructed by Christians (not Jews) deriving for their basis from the pseudepigrapha of Noah and Enoch, which do not at all mention any "Lucifer" entity, but their proponent rebels were those such as "Semyaza".
Christian gospel narratives have "Satan" as a kind of antagonist initiator or tempter of the Jesus character, numerous stories of which were told in oral tales before being committed to writings. Still later the Satan name is given to a powerful antagonist within the Johannine apocalyptic material ("Revelations").
I think LaVey popularized the whole hail Satan thing. I personally do not use it. I think it is corny.It wouldn't surprise me if it preceded LaVey, but at least its format in signaling or saluting leaders and rulers preceded him by centuries. Two which come to mind (not admirable!):