Failed to start SYSV: MySQL database server…的解决方法
问题：
在虚拟机中安装MYSQL，重启虚拟机后MYSQL启动报错
[root@server1 ~]# systemctl start mysqld
Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.
查看日志：
journalctl -xe
cat /var/log/mysqld
解决：建立缺少的目录
mkdir -p /var/run/mysqld
systemctl start mysqld此是还是无法启动，修改目录权限
chown mysql.mysql /var/run/mysqld/
systemctl start mysqld启动成功
