banana nnn2 image
user banana password bananapi1
user root password 276b77ad5986f9268bec
you can use sudo from banana user.
https://mega.co.nz/#!9EUnXIZY!vA97Z3WzCRYtcJVsV6Zqidu0Cd3XpmXLhHfL8ck94pk
Just always remember to check the md5sum after downloading, it should match this one:
cc0cee7e794e38226806fcd8b6f33167 banana.7z