链接数据库时报错，应该是找不到mysql.sock
aaa@aaas-PC:/usr/local/phpstudy/soft/mysql/mysql-8.0.16/bin$ ./mysql -uroot -proot
mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
