How much do we know about the Jinn?

How much do we know about the Jinn?
Can the Jinn do this and that?
'Abd Al Rahman b. Abi Layla reports:

A man from his people, from Ansar, went out one night to pray 'Isha with his people (during the Caliphate of 'Umar r.a), but some jinn abducted him, and he went missing. His wife went to 'Umar r.a and told him (of her missing husband). 'Umar r.a asked his people about him, and they confirmed that he had gone out to pray 'Isha but had gone missing. 'Umar told the woman to wait for four years.

When four years had passed, the woman went back to 'Umar and informed him (of her case). He asked her people and they confirmed the case. He told her she could now marry, and she did. But her first husband returned and raised a dispute over the marriage to 'Umar b. al-Khattab r.a. 'Umar said, "one of you disappears for ages, his family does not know whether he is alive or not and then he turns up, making claims!". The man replied, "O leader of the believers, I have an excuse." He asked, "and what is your excuse?" The man replied, "I went out to pray 'Isha one night, but some jinn captured me, and I (was held captive) by them for a long time. Then some mu'min - or Muslim (one of the reporters, Sa'id was not sure of the exact word used) Jinn waged an attack on them, fought them and beat them, and took captives. They took me amongst the captives, but said, "we see that you are a Muslim man, and it is not allowed for us to keep you captive.' So they gave me the choice of staying with them or returning to my family. I chose to return to my family. They set off with me. By night, no one would say anything to me; but by day there would be a stick I would follow."

'Umar r.a asked the man, "What was your food when you were amongst them?" He replied, "Difficult (stone) food, and what had not had the name of Allah mentioned over it." 'Umar asked, "And what did you drink when you were amongst them?" He replied, "Al-jadaf (a type of drink that does not ferment)".

'Umar r.a ruled that the man had a choice to either get back the sadaq (dawry) he had given (and have his marriage stay nullified), or take back his wife.

Al-Bayhaqi, Al-Sunan Al-Kubra 7:445, 446. Al Albani graded its chain of transmission sahih in Irwa Al-Ghalil 4:151