我一直在努力寻找为什么我的 ubuntu 系统会自动重启。
我开始在 /var/log/syslog 中寻找答案，但不明白是什么导致了重启。在系统重启后，上午 11:17 之前发生了一些事情。有人能帮我吗？ 另一个帮助我获得该日志的答案。 这是系统日志文件：
Dec 12 08:25:09 MKMH01 rsyslogd: [origin software="rsyslogd" swVersion="8.32.0" x-pid="716" x-info="http://www.rsyslog.com"] rsyslogd was HUPed
Dec 12 08:25:11 MKMH01 anacron[722]: Job `cron.daily' terminated
Dec 12 08:25:11 MKMH01 anacron[722]: Normal exit (1 job run)
Dec 12 08:35:01 MKMH01 CRON[3999]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 08:35:09 MKMH01 systemd[1]: Starting Cleanup of Temporary Directories...
Dec 12 08:35:09 MKMH01 systemd[1]: Started Cleanup of Temporary Directories.
Dec 12 08:45:01 MKMH01 CRON[4293]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 08:55:01 MKMH01 CRON[4567]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 08:56:07 MKMH01 kernel: [ 2161.871675] usb 6-1: new SuperSpeed USB device number 2 using xhci_hcd
Dec 12 08:56:07 MKMH01 kernel: [ 2161.897810] usb 6-1: New USB device found, idVendor=2109, idProduct=0817
Dec 12 08:56:07 MKMH01 kernel: [ 2161.897812] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Dec 12 08:56:07 MKMH01 kernel: [ 2161.897813] usb 6-1: Product: USB3.0 Hub
Dec 12 08:56:07 MKMH01 kernel: [ 2161.897814] usb 6-1: Manufacturer: VIA Labs, Inc.
Dec 12 08:56:07 MKMH01 kernel: [ 2161.898777] hub 6-1:1.0: USB hub found
Dec 12 08:56:07 MKMH01 kernel: [ 2161.899001] hub 6-1:1.0: 4 ports detected
Dec 12 08:56:07 MKMH01 upowerd[1010]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:08.1/0000:07:00.4/usb6/6-1/6-1:1.0
Dec 12 08:56:07 MKMH01 upowerd[1010]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:08.1/0000:07:00.4/usb6/6-1
Dec 12 09:05:01 MKMH01 CRON[4897]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 09:05:09 MKMH01 systemd[1]: Started Run anacron jobs.
Dec 12 09:05:09 MKMH01 anacron[4903]: Anacron 2.3 started on 2019-12-12
Dec 12 09:05:09 MKMH01 anacron[4903]: Normal exit (0 jobs run)
Dec 12 09:15:01 MKMH01 CRON[5235]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 09:17:01 MKMH01 CRON[5295]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 12 09:25:01 MKMH01 CRON[5529]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 09:35:01 MKMH01 CRON[5817]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 09:45:01 MKMH01 CRON[6102]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 09:55:01 MKMH01 CRON[6420]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 10:04:08 MKMH01 systemd[1]: Started Run anacron jobs.
Dec 12 10:04:08 MKMH01 anacron[6678]: Anacron 2.3 started on 2019-12-12
Dec 12 10:04:08 MKMH01 anacron[6678]: Normal exit (0 jobs run)
Dec 12 10:05:01 MKMH01 CRON[6701]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 10:15:01 MKMH01 CRON[7004]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 10:17:01 MKMH01 CRON[7049]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 12 10:25:01 MKMH01 CRON[7284]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 10:35:01 MKMH01 CRON[7575]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 10:45:01 MKMH01 CRON[7865]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 10:55:01 MKMH01 CRON[8159]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 11:04:22 MKMH01 systemd[1]: Started Run anacron jobs.
Dec 12 11:04:22 MKMH01 anacron[8421]: Anacron 2.3 started on 2019-12-12
Dec 12 11:04:22 MKMH01 anacron[8421]: Normal exit (0 jobs run)
Dec 12 11:05:01 MKMH01 CRON[8444]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 11:15:01 MKMH01 CRON[8730]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Dec 12 11:17:42 MKMH01 systemd-modules-load[323]: Inserted module 'lp'
Dec 12 11:17:42 MKMH01 systemd-modules-load[323]: Inserted module 'ppdev'
Dec 12 11:17:42 MKMH01 systemd-modules-load[323]: Inserted module 'parport_pc'
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Flush Journal to Persistent Storage...
Dec 12 11:17:42 MKMH01 systemd[1]: Started Set the console keyboard layout.
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Show Plymouth Boot Screen...
Dec 12 11:17:42 MKMH01 systemd[1]: Reached target Local File Systems (Pre).
Dec 12 11:17:42 MKMH01 systemd-networkd[347]: Enumeration completed
Dec 12 11:17:42 MKMH01 systemd-networkd[347]: lo: Link is not managed by us
Dec 12 11:17:42 MKMH01 systemd[1]: Mounting Mount unit for core, revision 8039...
Dec 12 11:17:42 MKMH01 systemd[1]: Mounting Mount unit for core, revision 8213...
Dec 12 11:17:42 MKMH01 systemd[1]: Mounting Mount unit for code, revision 21...
Dec 12 11:17:42 MKMH01 systemd[1]: Started Network Service.
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Wait for Network to be Configured...
Dec 12 11:17:42 MKMH01 systemd[1]: Started Show Plymouth Boot Screen.
Dec 12 11:17:42 MKMH01 systemd[1]: Reached target Local Encrypted Volumes.
Dec 12 11:17:42 MKMH01 systemd[1]: Started Forward Password Requests to Plymouth Directory Watch.
Dec 12 11:17:42 MKMH01 systemd[1]: Mounted Mount unit for core, revision 8039.
Dec 12 11:17:42 MKMH01 systemd[1]: Started Flush Journal to Persistent Storage.
Dec 12 11:17:42 MKMH01 systemd[1]: Mounted Mount unit for core, revision 8213.
Dec 12 11:17:42 MKMH01 systemd-networkd-wait-online[379]: ignoring: lo
Dec 12 11:17:42 MKMH01 systemd-networkd-wait-online[379]: message repeated 4 times: [ ignoring: lo]
Dec 12 11:17:42 MKMH01 systemd-udevd[359]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.
Dec 12 11:17:42 MKMH01 systemd-networkd-wait-online[379]: ignoring: lo
Dec 12 11:17:42 MKMH01 systemd-networkd-wait-online[379]: ignoring: lo
Dec 12 11:17:42 MKMH01 systemd[1]: Mounted Mount unit for code, revision 21.
Dec 12 11:17:42 MKMH01 systemd-udevd[354]: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable.
Dec 12 11:17:42 MKMH01 systemd[1]: Reached target Sound Card.
Dec 12 11:17:42 MKMH01 mtp-probe: checking bus 1, device 2: "/sys/devices/pci0000:00/0000:00:01.2/0000:01:00.0/usb1/1-5"
Dec 12 11:17:42 MKMH01 mtp-probe: bus: 1, device: 2 was not an MTP device
Dec 12 11:17:42 MKMH01 systemd[1]: Found device INTEL SSDPEKNW512G8 EFI\x20System\x20Partition.
Dec 12 11:17:42 MKMH01 systemd[1]: Starting File System Check on /dev/disk/by-uuid/276D-AB39...
Dec 12 11:17:42 MKMH01 systemd[1]: Started File System Check Daemon to report status.
Dec 12 11:17:42 MKMH01 systemd-fsck[631]: fsck.fat 4.1 (2017-01-24)
Dec 12 11:17:42 MKMH01 systemd-fsck[631]: 0x41: Dirty bit is set. Fs was not properly unmounted and some data may be corrupt.
Dec 12 11:17:42 MKMH01 systemd-fsck[631]: Automatically removing dirty bit.
Dec 12 11:17:42 MKMH01 systemd-fsck[631]: Performing changes.
Dec 12 11:17:42 MKMH01 systemd-fsck[631]: /dev/nvme0n1p1: 12 files, 1558/130812 clusters
Dec 12 11:17:42 MKMH01 systemd[1]: Started File System Check on /dev/disk/by-uuid/276D-AB39.
Dec 12 11:17:42 MKMH01 systemd[1]: Mounting /boot/efi...
Dec 12 11:17:42 MKMH01 systemd[1]: Mounted /boot/efi.
Dec 12 11:17:42 MKMH01 systemd[1]: Reached target Local File Systems.
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Tell Plymouth To Write Out Runtime Data...
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Create Volatile Files and Directories...
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Set console font and keymap...
Dec 12 11:17:42 MKMH01 systemd[1]: Starting AppArmor initialization...
Dec 12 11:17:42 MKMH01 systemd[1]: Started Set console font and keymap.
Dec 12 11:17:42 MKMH01 systemd[1]: Started Tell Plymouth To Write Out Runtime Data.
Dec 12 11:17:42 MKMH01 systemd[1]: Started Create Volatile Files and Directories.
Dec 12 11:17:42 MKMH01 apparmor[640]: * Starting AppArmor profiles
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Network Name Resolution...
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Network Time Synchronization...
Dec 12 11:17:42 MKMH01 systemd[1]: Starting Update UTMP about System Boot/Shutdown...
Dec 12 11:17:42 MKMH01 systemd[1]: Started Update UTMP about System Boot/Shutdown.
Dec 12 11:17:42 MKMH01 apparmor[640]: Skipping profile in /etc/apparmor.d/disable: usr.sbin.rsyslogd
Dec 12 11:17:42 MKMH01 apparmor[640]: ...done.