今天服务器突然挂了，数据库也开始报以下错误，重启也启动不了。。

phpMyAdmin - Error
Error during session start; please check your PHP and/or webserver log file and configure your PHP installation properly. Also ensure that cookies are enabled in your browser.
session_write_close(): write failed: No space left on device (28)
session_write_close(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct ()

经过各种研究，发现是磁盘满了，然后开始研究删东西。删了一部分，果然好了，但是我的服务器有采集业务，看来得拓展空间了。。

Linux实例磁盘空间满和inode满的问题排查方法
Linux 系统 /var/log/journal/ 垃圾日志清理