need account on steemit.com for mining ?
No. Just follow one of the mining guide and you will be fine.
ok, done, but miner stuck with these messages :
2672679ms th_a thread.cpp:95 thread ] name:ntp tid:140487625266944
2672680ms th_a thread.cpp:95 thread ] name:p2p tid:140487616874240
2672835ms ntp ntp.cpp:177 read_loop ] ntp_delta_time updated to -24406 us
it's normal ?