CentOS下配置MySQL容许root用户远程登陆 Mysql为了安全性,在默认状况下用户只容许在本地登陆 执行GRANT PRIVILEDGES受权时报语法错误 或者如下提示 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