I have just upgraded my dual-boot desktop from Kubuntu 16.04 to 18.04 using the link which popped up. Obviously the internet was connected for the upgrade, but although the dialog box on the panel says I have a wired 802.3 connection as hitherto, Firefox can't access the internet.
I have tried Question 453401, now 4 years old, but can't get beyond the first stage - so I changed the Network managed back to false and hope for a reply. At the top left of the network panel dialog box, there are blank square and a red plane icons. I have experimented changing the square to blue and the plane to white, but no joy. Please help.
Thanks for help valiano and guiverc. The pings didn't work, but the hardware list was as follows:
WGCman@WGCman-Z97P-D3:~$ sudo lshw -C network [sudo] password for WGCman: *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: eth0 version: 06 serial: fc:aa:14:06:42:8d size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 10 0bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware= rtl8168e-3_0.0.4 03/27/12 ip=192.168.1.10 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: irq:18 ioport:d000(size=256) memory:f7900000-f7900fff memory:f2100000-f2103fff WGCman@WGCman-Z97P-D3:~$ ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether fc:aa:14:06:42:8d brd ff:ff:ff:ff:ff:ff inet 192.168.1.10/24 brd 192.168.1.255 scope global dynamic noprefixroute eth0 valid_lft 85494sec preferred_lft 85494sec inet6 fe80::7f22:4323:b7c0:9131/64 scope link noprefixroute valid_lft forever preferred_lft forever WGCman@WGCman-Z97P-D3:~$ ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. From 192.168.1.10 icmp_seq=1 Destination Host Unreachable From 192.168.1.10 icmp_seq=2 Destination Host Unreachable WGCman@WGCman-Z97P-D3:~$ ping 22.214.171.124 PING 126.96.36.199 (188.8.131.52) 56(84) bytes of data. 64 bytes from 184.108.40.206: icmp_seq=1 ttl=121 time=19.7 ms 64 bytes from 220.127.116.11: icmp_seq=2 ttl=121 time=15.0 ms WGCman@WGCman-Z97P-D3:~$ ping google.com ping: google.com: Temporary failure in name resolution WGCman@WGCman-Z97P-D3:~$
Thanks, David, The Script returns: --2018-09-13 20:43:08-- https://github.com/UbuntuForums/wireless-info/raw/master/wireless-info Resolving github.com (github.com)... failed: Temporary failure in name resolution. wget: unable to resolve host address ‘github.com’ This looks unhelpful and is probably because my computer cannot access the internet either wirelessly or via ethernet (Powerline Plug) with Kubuntu 18.04, though it could with 16.04 and still can with Windows 10. After a recent W10 upgrade I had to resubmit the wireless key for the dongle to work, but the Kubuntu upgrade has not asked for any passwords. I note the instructions in your link to send files across to a device with internet access - with my dual boot machine this should be easy! - but it doesn't say which files.