'Know' in the Bible

Thou knowest Abner the son of Ner, that he came to deceive thee, to know thy going out and thy coming in, and to know all that thou doest.

And when Joab was come out from David, he sent messengers after Abner, who brought him again from the well of Sirah; but David did not know it.

And the king said to his servants, Know ye not that there is a prince and a great man fallen this day in Israel?

For thy word's sake, and according to thine own heart, hast thou done all this greatness, to make thy servant know it.

and if so be that the king's wrath arise, and he say to thee, Why did ye go so near to the city to fight? did ye not know that they would shoot from the wall?

in order to turn the appearance of the thing has thy servant Joab done this thing; but my lord is wise, according to the wisdom of an angel of God, to know all that is in the earth.

And David said, What have I to do with you, ye sons of Zeruiah, that ye should this day be adversaries to me? Should there any man be put to death this day in Israel? for do not I know that I am this day king over Israel?

And the king said to Joab the captain of the host, who was with him, Go, I pray thee, through all the tribes of Israel, from Dan even to Beer-sheba, and count the people, that I may know the number of the people.