With regard to those who say that the baptism of Acts 2:38; 22:16, 1 Pt. 3:21, etc., is Holy Spirit baptism... it isn't, and here's why...
If you look at Acts 1:4, 5... Jesus commanded His apostles to not leave Jerusalem, but to wait there because "in a few days [they would] be baptized with the Holy Spirit."
Then, Acts 2:1-4 shows the fulfillment of the Lord's words when the sound of the rushing, mighty wind came from heaven and cloven (divided) tongues as of fire rested on each of the apostles there. Notice that in this act of the baptism of the Holy Spirit, it came upon them BY THE WILL OF GOD, AT THE TIME OF HIS CHOOSING --- NOT--- BY THEM BEING GIVEN A COMMAND TO OBEY TO RECEIVE IT.
Then in Acts 2:38, the 2-part command is given to all of the multitude to "Repent and be baptized..." indicating something that THEY were to do.
Then, Acts 10:44-48 removes all doubt. Because in these verses is seen the baptism of the Holy Spirit on the Gentiles... "While Peter was still speaking these words, the Holy Spirit came on all who heard the message [' Then I remembered what the Lord had said: 'John baptized with water, but you will be baptized with the Holy Spirit' ", Acts 11:16]."
But then right after the baptism of the Holy Spirit took place, Peter said --- "Can anyone keep these people from being baptized WITH WATER? They have received the Holy Spirit just as we have. SO HE ** ORDERED ** THAT THEY BE BAPTIZED IN THE NAME OF JESUS CHRIST" (Acts 10:47, 48).
The case of Philip and the Ethiopian eunuch also shows that the baptism that accompanies the preaching of Christ is WATER baptism (Acts 8:35-39).
But the case of Cornelius and those present in his household, recorded in Acts 10:34-48 [esp. vv. 44-48], shows crystal clear that Holy Spirit baptism is an act done by the will of God at the time and place of His choosing... while the baptism that is commanded to people and is to be obeyed by them, is water baptism!