linux启动mysql时报错：mysqld_safe error: log-error set to '/var/log/mariadb/mariadb.log', however file don't exists. Create writable for user 'mysql'解决办法：yum list installed |grep mariadb查看系统是否带mariadb数据库删除系

1.firewall-cmd --list-all 查看开放的端口号2.给nginx重新设置端口号：sudo firewall-cmd --add-port=80/tcp --permanent3.重启防火墙firewall-cmd --reload4.访问检测：浏览器端输入linux的ip访问