CentOS下配置MySQL允许root用户远程登录 Mysql为了安全性,在默认情况下用户只允许在本地登录 执行GRANT PRIVILEDGES授权时报语法错误 或者以下提示 Column count of mysql.user is wrong. Expected 43, found 42. Created with MySQL 50560, now running 50643. Please use mysql_upgrade to fix this error.按其提示执行mysql_upgrade