每次我关闭 Ubuntu 14.04 PC 时，都会出现黑屏，显示一些警告，仅持续 1 秒。读取它非常快。这与操作系统或硬件无关，也许与我最近安装的服务器有关。那么如何查看它？请指教，谢谢。
运行此命令后我得到了此信息：
grep -iE 'mysql|server' /var/log/syslog /var/log/kern.log
Dec 27 00:01:02 dnsmasq[1363]: setting upstream servers from DBus
/var/log/syslog:Dec 27 00:01:20 dnsmasq[1677]: no servers found in /etc/resolv.conf, will retry
/var/log/syslog:Dec 27 00:01:22 NetworkManager[911]: <info> nameserver '192.168.1.1'
/var/log/syslog:Dec 27 00:01:23 dnsmasq[1363]: setting upstream servers from DBus
/var/log/syslog:Dec 27 00:01:23 dnsmasq[1363]: using nameserver 192.168.1.1#53
/var/log/syslog:Dec 27 00:01:32 ntpdate[8178]: no server suitable for synchronization found
/var/log/syslog:Dec 27 00:02:51dnsmasq[1677]: using nameserver 127.0.1.1#53
/var/log/syslog:Dec 27 00:02:51 dnsmasq[1363]: setting upstream servers from DBus
/var/log/syslog:Dec 27 07:08:02 5 ntpdate[825]: no servers can be used, exiting
/var/log/syslog:Dec 27 07:08:02 bluetoothd[830]: Starting SDP server
/var/log/syslog:Dec 27 07:08:02 avahi-daemon[827]: Server startup complete. Host name is .local. Local service cookie is 2471667593.
/var/log/syslog:Dec 27 07:08:12 dnsmasq[1671]: no servers found in /etc/resolv.conf, will retry
/var/log/syslog:Dec 27 07:09:30 NetworkManager[905]: <info> nameserver '192.168.1.1'
/var/log/syslog:Dec 27 07:09:31 NetworkManager[905]: <warn> dnsmasq not available on the bus, can't update servers.
/var/log/syslog:Dec 27 07:09:31 dnsmasq[2068]: warning: no upstream servers configured
/var/log/syslog:Dec 27 07:09:32 5 dnsmasq[2068]: setting upstream servers from DBus
/var/log/syslog:Dec 27 07:09:32 dnsmasq[2068]: using nameserver 192.168.1.1#53
/var/log/syslog:Dec 27 07:09:39 ntpdate[2186]: adjust time server 91.189.94.4 offset -0.337961 sec
/var/log/syslog:Dec 27 07:11:26 -1545 dnsmasq[1671]: using nameserver 127.0.1.1#53
/var/log/syslog:Dec 27 07:36:29 ntpdate[826]: no servers can be used, exiting
/var/log/syslog:Dec 27 07:36:29 bluetoothd[809]: Starting SDP server
/var/log/syslog:Dec 27 07:36:29 avahi-daemon[843]: Server startup complete. Host name is .local. Local service cookie is 3166850630.
/var/log/syslog:Dec 27 07:36:34 NetworkManager[907]: <info> nameserver '192.168.1.1'
/var/log/syslog:Dec 27 07:36:35 NetworkManager[907]: <warn> dnsmasq not available on the bus, can't update servers.
/var/log/syslog:Dec 27 07:36:36 dnsmasq[1348]: warning: no upstream servers configured
/var/log/syslog:Dec 27 07:36:38 dnsmasq[1348]: setting upstream servers from DBus
/var/log/syslog:Dec 27 07:36:38 dnsmasq[1348]: using nameserver 192.168.1.1#53
/var/log/syslog:Dec 27 07:36:41 dnsmasq[1970]: using nameserver 127.0.1.1#53
/var/log/syslog:Dec 27 07:36:46 ntpdate[1648]: adjust time server 91.189.94.4 offset -0.336311 sec
顺便说一句，实际的警告/错误并不像上面的那么大。可能只有 2/3 行。