Apr 13 17:49:45 ubuntu systemd-networkd[1171]: eth0: Lost carrier
Apr 13 17:49:45 ubuntu kernel: [80410.727887] bcmgenet fd580000.genet eth0: Link is Down
Apr 13 17:49:45 ubuntu systemd-networkd[1171]: eth0: DHCP lease lost
Apr 13 17:49:45 ubuntu dbus-daemon[1298]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.1' (uid=101 pid=1171 comm="/lib/systemd/systemd-networkd " label="unconfined")
Apr 13 17:49:45 ubuntu avahi-daemon[1292]: Withdrawing address record for 192.168.31.212 on eth0.
Apr 13 17:49:45 ubuntu avahi-daemon[1292]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.31.212.
Apr 13 17:49:45 ubuntu avahi-daemon[1292]: Interface eth0.IPv4 no longer relevant for mDNS.
Apr 13 17:49:45 ubuntu systemd[1]: Starting Hostname Service...
Apr 13 17:49:45 ubuntu dbus-daemon[1298]: [system] Successfully activated service 'org.freedesktop.hostname1'
Apr 13 17:49:45 ubuntu systemd[1]: Started Hostname Service.
Apr 13 17:50:15 ubuntu systemd[1]: systemd-hostnamed.service: Succeeded.
Apr 13 17:50:26 ubuntu kernel: [80451.528566] usb 2-1: USB disconnect, device number 3
Apr 13 17:50:26 ubuntu kernel: [80451.530583] sd 0:0:0:0: [sda] Synchronizing SCSI cache
Apr 13 17:50:26 ubuntu kernel: [80451.530789] sd 0:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Apr 13 17:50:26 ubuntu multipathd[1176]: sda: path already removed
Apr 13 17:50:28 ubuntu kernel: [80453.744546] usb 2-2: new SuperSpeed Gen 1 USB device number 4 using xhci_hcd
Apr 13 17:50:28 ubuntu kernel: [80453.766803] usb 2-2: New USB device found, idVendor=0480, idProduct=b207, bcdDevice= 3.15
Apr 13 17:50:28 ubuntu kernel: [80453.766811] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Apr 13 17:50:28 ubuntu kernel: [80453.766815] usb 2-2: Product: External USB 3.0
Apr 13 17:50:28 ubuntu kernel: [80453.766819] usb 2-2: Manufacturer: TOSHIBA
Apr 13 17:50:28 ubuntu kernel: [80453.766823] usb 2-2: SerialNumber: 20180524007993F
Apr 13 17:50:28 ubuntu kernel: [80453.769589] usb-storage 2-2:1.0: USB Mass Storage device detected
Apr 13 17:50:28 ubuntu kernel: [80453.769854] scsi host0: usb-storage 2-2:1.0
Apr 13 17:50:32 ubuntu kernel: [80457.619877] scsi 0:0:0:0: Direct-Access TOSHIBA External USB 3.0 5438 PQ: 0 ANSI: 6
Apr 13 17:50:32 ubuntu kernel: [80457.622143] sd 0:0:0:0: Attached scsi generic sg0 type 0
Apr 13 17:50:32 ubuntu kernel: [80457.623845] sd 0:0:0:0: [sda] 1953525164 512-byte logical blocks: (1.00 TB/932 GiB)
Apr 13 17:50:32 ubuntu kernel: [80457.624307] sd 0:0:0:0: [sda] Write Protect is off
Apr 13 17:50:32 ubuntu kernel: [80457.624320] sd 0:0:0:0: [sda] Mode Sense: 23 00 00 00
Apr 13 17:50:32 ubuntu kernel: [80457.631220] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Apr 13 17:50:32 ubuntu kernel: [80457.649131] sda: sda1
Apr 13 17:50:32 ubuntu kernel: [80457.651948] sd 0:0:0:0: [sda] Attached SCSI disk
Apr 13 17:50:53 ubuntu kernel: [80479.336883] bcmgenet fd580000.genet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
Apr 13 17:50:53 ubuntu systemd-networkd[1171]: eth0: Gained carrier
Apr 13 17:50:53 ubuntu NetworkManager[1299]: <info> [1586800253.9297] device (eth0): carrier: link connected
Apr 13 17:50:53 ubuntu dbus-daemon[1298]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' requested by ':1.1' (uid=101 pid=1171 comm="/lib/systemd/systemd-networkd " label="unconfined")
Apr 13 17:50:53 ubuntu systemd-networkd[1171]: eth0: DHCPv4 address 192.168.31.212/24 via 192.168.31.1
Apr 13 17:50:53 ubuntu avahi-daemon[1292]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.31.212.
Apr 13 17:50:53 ubuntu avahi-daemon[1292]: New relevant interface eth0.IPv4 for mDNS.
Apr 13 17:50:53 ubuntu avahi-daemon[1292]: Registering new address record for 192.168.31.212 on eth0.IPv4.
Apr 13 17:50:53 ubuntu systemd-networkd[1171]: eth0: Configured
Apr 13 17:50:53 ubuntu systemd[1]: Starting Hostname Service...
Apr 13 17:50:54 ubuntu dbus-daemon[1298]: [system] Successfully activated service 'org.freedesktop.hostname1'
Apr 13 17:50:54 ubuntu systemd[1]: Started Hostname Service.
Apr 13 17:50:54 ubuntu systemd-hostnamed[2357]: Changed host name to 'MiWiFi-R1CM-srv'
ubuntu@ubuntu:/var/log$ ls
ajenti apport.log auth.log.3.gz dist-upgrade dpkg.log kern.log postgresql syslog.4.gz ufw.log.2.gz
alternatives.log apport.log.1 auth.log.4.gz dmesg dpkg.log.1 kern.log.1 private syslog.5.gz ufw.log.3.gz
alternatives.log.1 apport.log.2.gz btmp dmesg.0 dpkg.log.2.gz kern.log.2.gz samba syslog.6.gz ufw.log.4.gz
alternatives.log.2.gz apt btmp.1 dmesg.1.gz dpkg.log.3.gz kern.log.3.gz syslog syslog.7.gz unattended-upgrades
alternatives.log.3.gz auth.log cloud-init-output.log dmesg.2.gz dpkg.log.4.gz kern.log.4.gz syslog.1 sysstat wtmp
alternatives.log.4.gz auth.log.1 cloud-init.log dmesg.3.gz fontconfig.log landscape syslog.2.gz ufw.log
apache2 auth.log.2.gz cups dmesg.4.gz journal lastlog syslog.3.gz ufw.log.1
ubuntu@ubuntu:~$ sudo lshw -C network
*-network:0
description: Wireless interface
physical id: 2
logical name: wlan0
serial: dc:a6:32:57:07:15
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=brcmfmac driverversion=7.45.18 firmware=01-6a2c8ad4 ip=192.168.31.215 multicast=yes wireless=IEEE 802.11
*-network:1
description: Ethernet interface
physical id: 3
logical name: eth0
serial: dc:a6:32:57:07:12
size: 100Mbit/s
capacity: 1Gbit/s
capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=bcmgenet driverversion=v2.0 duplex=full ip=192.168.31.212 link=yes multicast=yes port=MII speed=100Mbit/s