I upgraded to Ubuntu 18.04 and suddenly I don't have internet on command line, wired nor wireless, some domains seem not to resolve, though ping 8.8.8.8 does work, but service networking status is outputting error. I saw many tweaks here on askubuntu regarding the issue, with ifconfig or /etc/network/interface but none fully works. sudo service network-manager restart does not work either.
My network is basically a mess. Is there a way to fully reset network settings to a functional one? How is it possible that Ubuntu is releasing a main distro with such a bug, since this is a hot topic around?
Edit:
output of ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 00:8c:fa:8a:7c:ba txqueuelen 1000 (Ethernet)
RX packets 12829 bytes 5924414 (5.9 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 8755 bytes 1396496 (1.3 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 40521 bytes 4309970 (4.3 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 40521 bytes 4309970 (4.3 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.3 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::5e82:7f12:37f8:854f prefixlen 64 scopeid 0x20<link>
ether 34:de:1a:7f:93:1a txqueuelen 1000 (Ethernet)
RX packets 27441 bytes 22237443 (22.2 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 18332 bytes 5607005 (5.6 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
output of ip addr && cat /etc/resolv.conf && sudo lshw -C Network
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 00:8c:fa:8a:7c:ba brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 34:de:1a:7f:93:1a brd ff:ff:ff:ff:ff:ff
inet 192.168.1.3/24 brd 192.168.1.255 scope global dynamic noprefixroute wlan0
valid_lft 84519sec preferred_lft 84519sec
inet6 fe80::5e82:7f12:37f8:854f/64 scope link noprefixroute
valid_lft forever preferred_lft forever
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 8.8.8.8
nameserver 127.0.0.53
options edns0
-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:07:00.0
logical name: eth0
version: 0c
serial: 00:8c:fa:8a:7c:ba
size: 1Gbit/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 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
resources: irq:16 ioport:3000(size=256) memory:c1700000-c1700fff memory:c1400000-c1403fff
-network
description: Wireless interface
product: Wireless 3160
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:08:00.0
logical name: wlan0
version: cb
serial: 34:de:1a:7f:93:1a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.15.0-45-generic firmware=17.948900127.0 ip=192.168.1.3 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:33 memory:c1600000-c1601fff
cat /etc/apt/sources.list:
# deb cdrom:[Ubuntu 15.10 _Wily Werewolf_ - Release amd64 (20151021)]/ wily main restricted
See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
newer versions of the distribution.
Major bug fix updates produced after the final release of the
distribution.
N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
team. Also, please note that software in universe WILL NOT receive any
review or updates from the Ubuntu security team.
N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
team, and may not be under a free licence. Please satisfy yourself as to
your rights to use the software. Also, please note that software in
multiverse WILL NOT receive any review or updates from the Ubuntu
security team.
N.B. software from this repository may not have been tested as
extensively as that contained in the main release, although it includes
newer versions of some applications which may provide useful features.
Also, please note that software in backports WILL NOT receive any review
or updates from the Ubuntu security team.
Uncomment the following two lines to add software from Canonical's
'partner' repository.
This software is not part of Ubuntu, but is offered by Canonical and the
deb http://archive.ubuntu.com/ubuntu bionic main universe restricted multiverse
respective vendors as a service to Ubuntu users.
deb http://security.ubuntu.com/ubuntu/ bionic-security universe multiverse restricted main
deb http://archive.ubuntu.com/ubuntu bionic-updates universe multiverse restricted main
deb http://archive.ubuntu.com/ubuntu bionic-backports universe multiverse restricted main
deb http://archive.canonical.com/ubuntu bionic partner
deb-src http://archive.canonical.com/ubuntu bionic partner
deb [arch=amd64,i386] https://deb.opera.com/opera-stable/ stable non-free
deb-src [arch=amd64,i386] https://deb.opera.com/opera-stable/ stable non-free
