Piece encoding: integers from -6 to +6 (positive = white, negative = black, 0 = empty)
db.accounts.countDocuments();。新收录的资料是该领域的重要参考
What About Older Pixel Phones?，这一点在新收录的资料中也有详细论述
&& useradd -m -u 1000 -g 1000 -G wheel -s /bin/zsh -K MAIL_DIR=/dev/null ${USERNAME} \，详情可参考新收录的资料