我有一个树莓派。我有一个 crontab 正在运行并告诉它在每天中午重新启动（sudo reboot now）。
这是结果last reboot -F：
myuser@mypiname:~ $ last -F reboot
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 still running
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 still running
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 still running
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Tue Oct 27 12:00:33 2020 (18562+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Tue Oct 27 12:00:03 2020 (18562+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 26 12:01:00 2020 (18561+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 26 12:00:31 2020 (18561+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 26 12:00:03 2020 (18561+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 26 12:00:03 2020 (18561+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 26 12:00:03 2020 (18561+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sun Oct 25 12:00:33 2020 (18560+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sun Oct 25 12:00:03 2020 (18560+11:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sat Oct 24 12:00:33 2020 (18559+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sat Oct 24 12:00:04 2020 (18559+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Fri Oct 23 12:00:03 2020 (18558+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 22 12:00:44 2020 (18557+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 22 12:00:11 2020 (18557+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Wed Oct 21 12:00:06 2020 (18556+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Tue Oct 20 12:00:33 2020 (18555+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Tue Oct 20 12:00:04 2020 (18555+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 19 12:00:33 2020 (18554+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 19 12:00:03 2020 (18554+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sun Oct 18 12:00:04 2020 (18553+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sat Oct 17 12:00:04 2020 (18552+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Fri Oct 16 12:00:33 2020 (18551+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Fri Oct 16 12:00:03 2020 (18551+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Fri Oct 16 12:00:03 2020 (18551+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 15 12:00:34 2020 (18550+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 15 12:00:04 2020 (18550+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Wed Oct 14 12:00:04 2020 (18549+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Wed Oct 14 12:00:04 2020 (18549+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Wed Oct 14 12:00:04 2020 (18549+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Tue Oct 13 12:00:33 2020 (18548+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Tue Oct 13 12:00:03 2020 (18548+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 12 12:00:36 2020 (18547+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 12 12:00:04 2020 (18547+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sun Oct 11 12:00:34 2020 (18546+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sun Oct 11 12:00:04 2020 (18546+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sat Oct 10 12:00:33 2020 (18545+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sat Oct 10 12:00:04 2020 (18545+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Fri Oct 9 12:02:03 2020 (18544+10:02)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Fri Oct 9 12:00:04 2020 (18544+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 8 12:00:34 2020 (18543+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 8 12:00:04 2020 (18543+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Wed Oct 7 12:00:33 2020 (18542+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Wed Oct 7 12:00:04 2020 (18542+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Tue Oct 6 12:00:04 2020 (18541+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 5 17:38:18 2020 (18540+15:38)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Mon Oct 5 12:00:04 2020 (18540+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sun Oct 4 12:00:33 2020 (18539+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sun Oct 4 12:00:03 2020 (18539+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Sat Oct 3 12:00:04 2020 (18538+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Fri Oct 2 12:00:03 2020 (18537+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Fri Oct 2 12:00:03 2020 (18537+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 1 18:07:11 2020 (18536+16:07)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 1 18:07:11 2020 (18536+16:07)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 1 18:07:11 2020 (18536+16:07)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 1 18:07:11 2020 (18536+16:07)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 1 18:07:11 2020 (18536+16:07)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 1 12:01:00 2020 (18536+10:00)
reboot system boot 4.19.66-v7+ Thu Jan 1 01:00:01 1970 - Thu Oct 1 12:00:31 2020 (18536+10:00)
wtmp begins Thu Oct 1 10:28:43 2020
我今天下午 2 点左右拔掉了 Raspberry Pi 的插头（27/10/2020 13:55:XX），但这里没有显示它已被拔掉（可能是因为它不是重新启动）。
如何获取上次启动时间而不是上次重新启动时间？另外，我希望拥有“所有”启动时间，而不仅仅是最后一次。
我尝试过last boot -F，但它没有显示任何内容。
答案1
获取启动时间
您在 Pi 上遇到的第一个问题。是在设备从网络时间服务器获取时间之前创建启动日志。该设备没有电池支持的时钟，因此从 开始1970-01-01T00:00（这也打破了who -b）。
你和我的日志中的第二个日期看起来很合理，但实际上是关闭时间。
您需要找到一种方法来记录该设备的启动时间。
一些想法
uptime --since给出正确的启动时间。 （系统现在有正确的时间）。
启动或重新启动
接下来我们需要问，重启与启动是什么意思？只有引导。但是我们可以查看是否有关闭过程。我们可以看看时差。我们可以（我不知道这是否被记录）查看什么类型的关闭，是重新启动类型的关闭吗？
答案2
尝试
$ who -b
您将获得上次启动的时间。
答案3
我寻求另一种解决方案。我不需要启动时的确切秒数，因此我选择cron在重新启动时使用日志记录：
@reboot echo "Rebooting at $(date)" >> /path/to/some/file
它的灵感来自@ctrl-alt-delor 的评论。