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读取 wlan0 的守护进程日志

tag-icon • tag-icon networking wifi daemon wlan
读取 wlan0 的守护进程日志

我有一个Raspberry Pi运行在Raspbain Linux.该设备运行良好，wlan0但从最近几天开始，它变得离线（与网络断开连接）。我想查看一些日志并发现其中包含一些有关网络连接 wlan0 的有用信息的daemon.log文件。/var/log/我这样做了cat daemon.log | grep wlan0，它显示了所有日志。

我试图理解所有日志并了解基本概念，但只是想更多地了解日志，因为很少有术语无法理解。

Apr  9 04:59:33 device dhcpcd[332]: wlan0: carrier acquired
Apr  9 04:59:33 device dhcpcd[332]: wlan0: adding address fe80::bac5:f37d:9bb4:65df
Apr  9 04:59:33 device dhcpcd[332]: wlan0: IAID eb:d3:4c:54
Apr  9 04:59:34 device dhcpcd[332]: wlan0: soliciting a DHCP lease
Apr  9 04:59:34 device dhcpcd[332]: wlan0: offered 192.168.0.57 from 192.168.0.1
Apr  9 04:59:34 device dhcpcd[332]: wlan0: soliciting an IPv6 router
Apr  9 04:59:34 device dhcpcd[332]: wlan0: probing address 192.168.0.57/24
Apr  9 04:59:35 device avahi-daemon[325]: Joining mDNS multicast group on interface wlan0.IPv6 with address fe80::bac5:f37d:9bb4:65df.
Apr  9 04:59:35 device avahi-daemon[325]: New relevant interface wlan0.IPv6 for mDNS.
Apr  9 04:59:35 device avahi-daemon[325]: Registering new address record for fe80::bac5:f37d:9bb4:65df on wlan0.       *.
Apr  9 04:59:38 device dhcpcd[332]: wlan0: leased 192.168.0.57 for 86400 seconds
Apr  9 04:59:38 device avahi-daemon[325]: Joining mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.57.
Apr  9 04:59:38 device avahi-daemon[325]: New relevant interface wlan0.IPv4 for mDNS.
Apr  9 04:59:39 device avahi-daemon[325]: Registering new address record for 192.168.0.57 on wlan0.IPv4.
Apr  9 04:59:39 device dhcpcd[332]: wlan0: adding route to 192.168.0.0/24
Apr  9 04:59:39 device dhcpcd[332]: wlan0: adding default route via 192.168.0.1
Apr  9 04:59:39 device dhcpcd[332]: wlan0: removing route to 192.168.0.0/24
Apr  9 04:59:47 device dhcpcd[332]: wlan0: no IPv6 Routers available
Apr  9 05:15:49 device dhcpcd[332]: wlan0: carrier lost
Apr  9 05:15:49 device dhcpcd[332]: wlan0: deleting address fe80::bac5:f37d:9bb4:65df
Apr  9 05:15:49 device avahi-daemon[325]: Withdrawing address record for fe80::bac5:f37d:9bb4:65df on wlan0.
Apr  9 05:15:49 device avahi-daemon[325]: Leaving mDNS multicast group on interface wlan0.IPv6 with address fe80::bac5:f37d:9bb4:65df.
Apr  9 05:15:49 device avahi-daemon[325]: Interface wlan0.IPv6 no longer relevant for mDNS.
Apr  9 05:15:49 device dhcpcd[332]: wlan0: deleting default route via 192.168.0.1
Apr  9 05:15:49 device avahi-daemon[325]: Withdrawing address record for 192.168.0.57 on wlan0.
Apr  9 05:15:49 device avahi-daemon[325]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.57.
Apr  9 05:15:49 device avahi-daemon[325]: Interface wlan0.IPv4 no longer relevant for mDNS.

上面，它说运营商已获得并由192.168.0.57路由器（192.168.0.1）提供。它尝试连接该 IP，并租用了 86400 秒（24 小时）。但在此之后，当它说wlan0: adding route to 192.168.0.0/24。这是什么意思。？

我无法理解它到底发生了什么。谁能向我解释一下吗？

谢谢

答案1

非常快速的概述：

dhcpd把手动态主机配置协议 (DHCP)响应，换句话说，是家庭路由器分配给您的计算机的 IP 地址。此分配（“租用”）有一个持续时间（“24 小时”）。

avahi-daemon把手Zeroconf/Bonjour消息，换句话说，有关家庭网络中本地设备的信息，尤其是 Apple 设备（或使用此协议的其他设备）。

该adding route消息与网络范围一起意味着，在您通过 DHCP 获得 IP 地址后，您的网络设置已意识到所有这些地址（在您的示例中，略微简化为 192.168.0.0-192.168.0.255）现在都可以通过 访问。这通常通过执行或类似命令wlan0来完成。尝试以 root 身份查看您当前的路由。ip route add ...ip route show

通过谷歌搜索，您可以轻松找到更多信息和网络介绍。

这些都无助于调试连接问题。看看dmesgor的输出/var/log/syslog*。

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