tmpfs   /tmp            tmpfs   defaults,noatime,mode=1777      0       0
tmpfs   /var/tmp        tmpfs   defaults,noatime,mode=1777      0       0
tmpfs   /var/log        tmpfs   defaults,noatime,mode=1777      0       0

Nov 19 12:15:25 shawn mysqld_safe[797]: 151119 12:15:25 mysqld_safe Can't log to error log and syslog at the same time.  Remove all --log-error configuration options for --syslog to take effect.
Nov 19 12:15:25 shawn mysqld_safe[797]: 151119 12:15:25 mysqld_safe Logging to '/var/log/mysql/error.log'.
Nov 19 12:15:25 shawn mysqld_safe[797]: touch: 无法创建"/var/log/mysql/error.log": 没有那个文件或目录
Nov 19 12:15:25 shawn mysqld_safe[797]: chmod: 无法访问"/var/log/mysql/error.log": 没有那个文件或目录
Nov 19 12:15:25 shawn systemd[1]: Started Light Display Manager.
Nov 19 12:15:25 shawn mysqld_safe[797]: 151119 12:15:25 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
Nov 19 12:15:25 shawn mysqld_safe[797]: /usr/bin/mysqld_safe: 126: /usr/bin/mysqld_safe: cannot create /var/log/mysql/error.log: Directory nonexistent
Nov 19 12:15:25 shawn mysqld_safe[797]: /usr/bin/mysqld_safe: 1: eval: cannot create /var/log/mysql/error.log: Directory nonexistent
Nov 19 12:15:25 shawn mysqld_safe[797]: 151119 12:15:25 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
Nov 19 12:15:25 shawn systemd[1]: mysql.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
Nov 19 12:15:25 shawn mysqld_safe[797]: /usr/bin/mysqld_safe: 126: /usr/bin/mysqld_safe: cannot create /var/log/mysql/error.log: Directory nonexistent

Nov 19 12:15:25 shawn nginx[787]: nginx: [alert] could not open error log file: open() "/var/log/nginx/error.log" failed (2: No such file or directory)
Nov 19 12:15:25 shawn nginx[787]: 2015/11/19 12:15:25 [emerg] 787#0: open() "/var/log/nginx/access.log" failed (2: No such file or directory)
Nov 19 12:15:25 shawn nginx[787]: nginx: configuration file /etc/nginx/nginx.conf test failed