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Old 09-12-2019, 01:03 PM   #16
michaelk
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I assume that other network devices can connect to the internet just fine?

wlp3s0 is the wireless and enp2s0 is the wired interface. NetworkManager does not use the /etc/network/interfaces configuration file and when it is running ifup/updown should fail.

Check out this article.
https://www.linuxjournal.com/content/have-plan-netplan

Last edited by michaelk; 09-12-2019 at 01:05 PM.
 
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Old 09-12-2019, 01:24 PM   #17
Firerat
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well, internet "works", DNS dosn't

/etc/resolv.conf -> ../run/resolvconf/resolv.conf
But, /run/resolvconf/ did not exist so link was always dead

I assumed resolvconf was installed and something went wrong with that.
however, it appears resolvconf was never installed.

what I don't know is why /etc/network/interfaces was edited
I don't know if that was before or after DNS was lost ( or if edit was to fix something else )

it shouldn't make a difference as network manager would setup networking

default Ubuntu18 /etc/network/interfaces
Code:
# ifupdown has been replaced by netplan(5) on this system.  See
# /etc/netplan for current configuration.
# To re-enable ifupdown on this system, you can run:
#    sudo apt install ifupdown
so I assume ifupdown was installed, but again that should not make any difference.

what I don't understand is what messed up the link
manually forced following some blog?

maybe just fixing the link is enough

Code:
sudo ln -sf ../run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
I future I may just ask for
Code:
history | grep sudo
and start there
 
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Old 09-12-2019, 01:51 PM   #18
coderlen
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Registered: May 2018
Location: Greenwood, IN
Distribution: Ubuntu
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Firerat, you asked me before if my Ubuntu 18 was an upgrade or a clean install.

Quote:
was this system upgraded to 18 or was it installed as 18?
It was installed as 18.

Quote:
was this before or after problems?
All these entries and fixes I am making were after the internet connectivity problem.

Here is the current result of "ip addr":

Code:
len@len-Satellite-E45t-A:~$ 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: enp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 20:1a:06:09:7b:74 brd ff:ff:ff:ff:ff:ff
3: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 5c:51:4f:5b:1f:4e brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.146/24 brd 192.168.1.255 scope global dynamic noprefixroute wlp3s0
       valid_lft 43135sec preferred_lft 43135sec
    inet6 fe80::4a1:dda3:dec0:6a33/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
len@len-Satellite-E45t-A:~$
Quote:
what does /etc/resolv.conf look liek now that resovconf has been removed?

is it now
/etc/resolv.conf -> ../run/systemd/resolve/stub-resolv.conf

what are the contents?
Here is what I got. Once again, there is no resolv.conf file. The results below will speak for themselves:

Code:
len@len-Satellite-E45t-A:~$ cat /etc/resolv.conf
cat: /etc/resolv.conf: No such file or directory
len@len-Satellite-E45t-A:~$ cd /etc
len@len-Satellite-E45t-A:/etc$ ls -al
total 1256
drwxr-xr-x 139 root root    12288 Sep 12 05:56 .
drwxr-xr-x  25 root root     4096 Sep  4 07:10 ..
drwxr-xr-x   3 root root     4096 Apr 26  2018 acpi
-rw-r--r--   1 root root     3028 Apr 26  2018 adduser.conf
drwxr-xr-x   2 root root    12288 Aug 27 01:11 alternatives
-rw-r--r--   1 root root      401 May 29  2017 anacrontab
drwxr-xr-x   3 root root     4096 May  6  2018 apache2
-rw-r--r--   1 root root      433 Oct  1  2017 apg.conf
drwxr-xr-x   6 root root     4096 Mar 13  2019 apm
drwxr-xr-x   3 root root     4096 Nov  2  2018 apparmor
drwxr-xr-x   8 root root     4096 Sep 10 12:12 apparmor.d
drwxr-xr-x   5 root root     4096 Aug 18 20:27 apport
-rw-r--r--   1 root root      769 Apr  4  2018 appstream.conf
drwxr-xr-x   7 root root     4096 Aug 18 19:59 apt
drwxr-xr-x   3 root root     4096 Feb  6  2019 avahi
-rw-r--r--   1 root root     2319 Apr  4  2018 bash.bashrc
-rw-r--r--   1 root root       45 Apr  1  2018 bash_completion
drwxr-xr-x   2 root root     4096 Aug 18 20:27 bash_completion.d
-rw-r--r--   1 root root      367 Jan 27  2016 bindresvport.blacklist
drwxr-xr-x   2 root root     4096 Apr 20  2018 binfmt.d
drwxr-xr-x   2 root root     4096 Jan 20  2019 bluetooth
-rw-r-----   1 root root       33 Apr 26  2018 brlapi.key
drwxr-xr-x   7 root root     4096 Apr 26  2018 brltty
-rw-r--r--   1 root root    25341 Apr 17  2018 brltty.conf
drwxr-xr-x   3 root root     4096 Apr 26  2018 ca-certificates
-rw-r--r--   1 root root     5898 Apr 26  2018 ca-certificates.conf
drwxr-xr-x   2 root root     4096 Apr 26  2018 calendar
drwxr-s---   2 root dip      4096 Jan 21  2019 chatscripts
-rw-r--r--   1 root root      155 Nov  4  2018 codehost.conf
lrwxrwxrwx   1 root root       39 Nov  4  2018 codehostprinter.cfg -> /usr/local/brightq//codehostprinter.cfg
drwxr-xr-x   2 root root     4096 Apr 29  2018 compizconfig
drwxr-xr-x   2 root root     4096 May 19 20:04 console-setup
drwxr-xr-x   2 root root     4096 Apr 26  2018 cracklib
drwxr-xr-x   2 root root     4096 Apr 26  2018 cron.d
drwxr-xr-x   2 root root     4096 Sep  4 07:08 cron.daily
drwxr-xr-x   2 root root     4096 Apr 26  2018 cron.hourly
drwxr-xr-x   2 root root     4096 Apr 26  2018 cron.monthly
-rw-r--r--   1 root root      722 Nov 16  2017 crontab
drwxr-xr-x   2 root root     4096 Aug 18 20:26 cron.weekly
drwxr-xr-x   5 root lp       4096 Sep 12 10:19 cups
drwxr-xr-x   2 root root     4096 Apr 26  2018 cupshelpers
drwxr-xr-x   4 root root     4096 Apr 26  2018 dbus-1
drwxr-xr-x   4 root root     4096 Apr 26  2018 dconf
-rw-r--r--   1 root root     2969 Feb 28  2018 debconf.conf
-rw-r--r--   1 root root       11 Jun 25  2017 debian_version
drwxr-xr-x   2 root root     4096 Aug 18 20:27 default
-rw-r--r--   1 root root      604 Aug 13  2017 deluser.conf
drwxr-xr-x   2 root root     4096 May  1 08:12 depmod.d
drwxr-xr-x   4 root root     4096 May 19 20:02 dhcp
drwxr-xr-x   2 root root     4096 Apr 27  2018 dictionaries-common
drwxr-xr-x   4 root root     4096 Aug 27 01:12 dpkg
-rw-r--r--   1 root root    14726 Feb  8  2019 drirc
drwxr-xr-x   3 root root     4096 Apr 26  2018 emacs
-rw-r--r--   1 root root       96 Apr 26  2018 environment
-rw-r--r--   1 root root     9103 Jul 18  2018 ffserver.conf
drwxr-xr-x   3 root root     4096 Sep 10 12:12 firefox
drwxr-xr-x   4 root root     4096 Apr 26  2018 fonts
-rw-rw-r--   1 root root      709 May 12  2018 fstab
-rw-r--r--   1 root root      279 Aug 27  2018 fuse.conf
drwxr-xr-x   3 root root     4096 Feb  3  2019 fwupd
-rw-r--r--   1 root root     2584 Feb  1  2018 gai.conf
drwxr-xr-x   2 root root     4096 Apr 26  2018 gdb
drwxr-xr-x   8 root root     4096 May  1 08:15 gdm3
drwxr-xr-x   2 root root     4096 Apr 26  2018 geoclue
drwxr-xr-x   4 root root     4096 Apr 26  2018 ghostscript
drwxr-xr-x   3 root root     4096 Mar  2  2019 gimp
drwxr-xr-x   3 root root     4096 Apr 26  2018 glvnd
drwxr-xr-x   2 root root     4096 Feb  3  2019 gnome
drwxr-xr-x   2 root root     4096 Apr 26  2018 groff
-rw-r--r--   1 root root      908 Mar 13  2019 group
-rw-r--r--   1 root root      888 Mar 13  2019 group-
drwxr-xr-x   2 root root     4096 May 17  2018 grub-customizer
drwxr-xr-x   5 root root     4096 May  1 08:10 grub.d
-rw-r-----   1 root shadow    754 Mar 13  2019 gshadow
-rw-r-----   1 root shadow    737 Mar 13  2019 gshadow-
drwxr-xr-x   3 root root     4096 Apr 26  2018 gss
drwxr-xr-x   2 root root     4096 Nov  4  2018 gtk-2.0
drwxr-xr-x   2 root root     4096 Aug 18 20:27 gtk-3.0
-rw-r--r--   1 root root     4861 Feb 22  2018 hdparm.conf
-rw-r--r--   1 root root       92 Apr  9  2018 host.conf
-rw-r--r--   1 root root       21 Apr 27  2018 hostname
-rw-r--r--   1 root root      235 Apr 27  2018 hosts
-rw-r--r--   1 root root      411 Apr 26  2018 hosts.allow
-rw-r--r--   1 root root      711 Apr 26  2018 hosts.deny
drwxr-xr-x   2 root root     4096 Apr 26  2018 hp
drwxr-xr-x   3 root root     4096 Apr 26  2018 ifplugd
drwxr-xr-x   2 root root     4096 Aug 18 20:22 ImageMagick-6
drwxr-xr-x   2 root root     4096 Aug 18 20:27 init
drwxr-xr-x   2 root root     4096 Sep 10 12:12 init.d
drwxr-xr-x   5 root root     4096 Aug 18 20:27 initramfs-tools
-rw-r--r--   1 root root     1748 May 15  2017 inputrc
drwxr-xr-x   2 root root     4096 May  1 08:15 insserv.conf.d
drwxr-xr-x   4 root root     4096 Apr 26  2018 iproute2
-rw-r--r--   1 root root       26 Aug  5 06:43 issue
-rw-r--r--   1 root root       19 Aug  5 06:43 issue.net
drwxr-xr-x   3 root root     4096 Apr 28  2018 .java
drwxr-xr-x   5 root root     4096 Aug 18 20:28 java-11-openjdk
drwxr-xr-x   5 root root     4096 Aug 18 20:27 java-8-openjdk
drwxr-xr-x   3 root root     4096 Apr 28  2018 java-8-oracle
drwxr-xr-x   6 root root     4096 Jan 26  2019 kernel
-rw-r--r--   1 root root      110 Apr 27  2018 kernel-img.conf
-rw-r--r--   1 root root     1308 Dec  1  2017 kerneloops.conf
drwxr-xr-x   2 root root     4096 Sep  4 07:09 ldap
-rw-r--r--   1 root root   139196 Sep 12 05:56 ld.so.cache
-rw-r--r--   1 root root       34 Jan 27  2016 ld.so.conf
drwxr-xr-x   2 root root     4096 Oct 14  2018 ld.so.conf.d
-rw-r--r--   1 root root      267 Apr  9  2018 legal
-rw-r--r--   1 root root       27 Jan 18  2018 libao.conf
-rw-r--r--   1 root root      191 Feb  7  2018 libaudit.conf
drwxr-xr-x   3 root root     4096 Apr 26  2018 libblockdev
drwxr-xr-x   2 root root     4096 Apr 26  2018 libnl-3
drwxr-xr-x   2 root root     4096 Apr 28  2017 libpaper.d
drwxr-xr-x   2 root root     4096 Aug 20 08:25 libreoffice
drwxr-xr-x   4 root root     4096 May  6  2018 lighttpd
-rw-r--r--   1 root root     1417 Apr  7  2018 lintianrc
-rw-r--r--   1 root root     2995 Apr 16  2018 locale.alias
-rw-r--r--   1 root root     9395 Apr 27  2018 locale.gen
lrwxrwxrwx   1 root root       48 Aug 18 20:22 localtime -> /usr/share/zoneinfo/America/Indiana/Indianapolis
drwxr-xr-x   4 root root     4096 Apr 26  2018 logcheck
-rw-r--r--   1 root root    10550 Jan 25  2018 login.defs
-rw-r--r--   1 root root      703 Aug 21  2017 logrotate.conf
drwxr-xr-x   2 root root     4096 Aug 27 01:12 logrotate.d
-rw-r--r--   1 root root      105 Aug  5 06:43 lsb-release
-rw-r--r--   1 root root    14867 Oct 13  2016 ltrace.conf
-r--r--r--   1 root root       33 Apr 27  2018 machine-id
-rw-r--r--   1 root root      111 Feb 13  2018 magic
-rw-r--r--   1 root root      111 Feb 13  2018 magic.mime
-rw-r--r--   1 root root    52815 Sep 12 05:56 mailcap
-rw-r--r--   1 root root      449 Jul 15  2016 mailcap.order
-rw-r--r--   1 root root     5174 Apr  7  2018 manpath.config
-rw-r--r--   1 root root    24301 Jul 15  2016 mime.types
-rw-r--r--   1 root root      812 Mar 24  2018 mke2fs.conf
drwxr-xr-x   2 root root     4096 Aug 18 20:22 modprobe.d
-rw-r--r--   1 root root      195 Apr 26  2018 modules
drwxr-xr-x   2 root root     4096 Sep 10 12:11 modules-load.d
lrwxrwxrwx   1 root root       19 Apr 27  2018 mtab -> ../proc/self/mounts
-rw-r--r--   1 root root      624 Aug  8  2007 mtools.conf
drwxr-xr-x   3 root root     4096 Apr 29  2018 mysql
-rw-r--r--   1 root root     9048 Feb 13  2018 nanorc
drwxr-xr-x   2 root root     4096 Apr 26  2018 netplan
drwxr-xr-x   7 root root     4096 Sep 11 19:03 network
drwxr-xr-x   6 root root     4096 Jan 26  2019 networkd-dispatcher
drwxr-xr-x   7 root root     4096 May 19 20:05 NetworkManager
-rw-r--r--   1 root root       91 Apr  9  2018 networks
drwxr-xr-x   2 root root     4096 Apr 26  2018 newt
-rw-r--r--   1 root root      556 Apr 26  2018 nsswitch.conf
drwxr-xr-x   2 root root     4096 Mar 26  2018 ODBCDataSources
-rw-r--r--   1 root root        0 Mar 26  2018 odbc.ini
-rw-r--r--   1 root root        0 May  6  2018 odbcinst.ini
drwxr-xr-x   2 root root     4096 May  6  2018 openal
drwxr-xr-x   2 root root     4096 Apr 26  2018 opt
lrwxrwxrwx   1 root root       21 Aug  5 06:43 os-release -> ../usr/lib/os-release
drwxr-xr-x   2 root root     4096 May  1 08:16 PackageKit
-rw-r--r--   1 root root      552 Apr  4  2018 pam.conf
drwxr-xr-x   2 root root     4096 Sep 10 12:12 pam.d
-rw-rw-r--   1 root root        7 Apr 27  2018 papersize
-rw-r--r--   1 root root     2407 Mar 13  2019 passwd
-rw-r--r--   1 root root     2387 Mar 13  2019 passwd-
drwxr-xr-x   2 root root     4096 Apr 26  2018 pcmcia
drwxr-xr-x   5 root root     4096 Apr 26  2018 perl
drwxr-xr-x   4 root root     4096 Apr 26  2018 pki
drwxr-xr-x   3 root root     4096 Apr 26  2018 pm
-rw-r--r--   1 root root     7649 Apr 26  2018 pnm2ppa.conf
drwxr-xr-x   5 root root     4096 Apr 26  2018 polkit-1
-rw-rw-r--   1 root root      350 Apr 27  2018 popularity-contest.conf
drwxr-xr-x   8 root dip      4096 Jan 21  2019 ppp
lrwxrwxrwx   1 root root       18 Aug 27 01:12 printcap -> /run/cups/printcap
-rw-r--r--   1 root root      581 Apr  9  2018 profile
drwxr-xr-x   2 root root     4096 Sep  4 07:09 profile.d
-rw-r--r--   1 root root     2932 Dec 25  2016 protocols
drwxr-xr-x   2 root root     4096 Mar 13  2019 pulse
-rw-------   1 root root        0 Apr 26  2018 .pwd.lock
drwxr-xr-x   2 root root     4096 Apr 29  2018 python
drwxr-xr-x   2 root root     4096 Aug 18 20:25 python2.7
drwxr-xr-x   2 root root     4096 Apr 26  2018 python3
drwxr-xr-x   2 root root     4096 Aug 18 20:27 python3.6
drwxr-xr-x   2 root root     4096 Apr 27  2018 rc0.d
drwxr-xr-x   2 root root     4096 Apr 27  2018 rc1.d
drwxr-xr-x   2 root root     4096 Apr 27  2018 rc2.d
drwxr-xr-x   2 root root     4096 Apr 27  2018 rc3.d
drwxr-xr-x   2 root root     4096 Apr 27  2018 rc4.d
drwxr-xr-x   2 root root     4096 Apr 27  2018 rc5.d
drwxr-xr-x   2 root root     4096 Apr 27  2018 rc6.d
drwxr-xr-x   2 root root     4096 Apr 27  2018 rcS.d
drwxr-xr-x   3 root root     4096 Apr 26  2018 resolvconf
lrwxrwxrwx   1 root root       27 Sep 10 22:46 resolv.conf -> /run/resolvconf/resolv.conf
-rwxr-xr-x   1 root root      268 Jul 21  2017 rmt
-rw-r--r--   1 root root      887 Dec 25  2016 rpc
-rw-r--r--   1 root root     1358 Jan 30  2018 rsyslog.conf
drwxr-xr-x   2 root root     4096 May  1 08:09 rsyslog.d
drwxr-xr-x   3 root root     4096 Aug 18 20:25 sane.d
-rw-r--r--   1 root root     4141 Jan 25  2018 securetty
drwxr-xr-x   4 root root     4096 May  1 07:51 security
drwxr-xr-x   2 root root     4096 Apr 26  2018 selinux
-rw-r--r--   1 root root    10368 Apr  5  2017 sensors3.conf
drwxr-xr-x   2 root root     4096 Apr 26  2018 sensors.d
-rw-r--r--   1 root root    19183 Dec 25  2016 services
drwxr-xr-x   2 root root     4096 Jan 26  2019 sgml
-rw-r-----   1 root shadow   1269 Mar 13  2019 shadow
-rw-r-----   1 root shadow   1269 Mar 13  2019 shadow-
-rw-r--r--   1 root root       73 Apr 26  2018 shells
drwxr-xr-x   2 root root     4096 Aug 18 20:03 skel
drwxr-xr-x   4 root root     4096 Apr 26  2018 speech-dispatcher
drwxr-xr-x   2 root root     4096 May  1 08:11 ssh
drwxr-xr-x   4 root root     4096 Aug 18 20:23 ssl
-rw-r--r--   1 root root       17 Apr 27  2018 subgid
-rw-r--r--   1 root root        0 Apr 26  2018 subgid-
-rw-r--r--   1 root root       17 Apr 27  2018 subuid
-rw-r--r--   1 root root        0 Apr 26  2018 subuid-
-r--r-----   1 root root      755 Jan 17  2018 sudoers
drwxr-xr-x   2 root root     4096 Apr 26  2018 sudoers.d
-rw-r--r--   1 root root     2683 Jan 17  2018 sysctl.conf
drwxr-xr-x   2 root root     4096 Sep 10 12:11 sysctl.d
drwxr-xr-x   5 root root     4096 Sep 10 12:11 systemd
drwxr-xr-x   2 root root     4096 Oct 28  2018 terminfo
drwxr-xr-x   2 root root     4096 May  1 08:09 thermald
drwxr-xr-x   2 root root     4096 Aug 18 20:27 thunderbird
-rw-r--r--   1 root root       29 Aug 18 20:22 timezone
drwxr-xr-x   2 root root     4096 Jan 20  2019 timidity
drwxr-xr-x   2 root root     4096 Apr 20  2018 tmpfiles.d
-rw-r--r--   1 root root     1260 Feb 25  2018 ucf.conf
drwxr-xr-x   4 root root     4096 Sep 10 12:12 udev
drwxr-xr-x   2 root root     4096 Jan 20  2019 udisks2
drwxr-xr-x   3 root root     4096 May  1 08:09 ufw
-rw-r--r--   1 root root      403 Mar  1  2018 updatedb.conf
drwxr-xr-x   3 root root     4096 Aug 18 20:27 update-manager
drwxr-xr-x   2 root root     4096 Aug 18 20:27 update-motd.d
drwxr-xr-x   2 root root     4096 Apr 20  2018 update-notifier
drwxr-xr-x   2 root root     4096 May  1 08:12 UPower
-rw-r--r--   1 root root     1523 Mar  6  2018 usb_modeswitch.conf
drwxr-xr-x   2 root root     4096 Feb 23  2018 usb_modeswitch.d
-rw-r--r--   1 root root       51 Feb 19  2016 vdpau_wrapper.cfg
drwxr-xr-x   2 root root     4096 Aug 18 20:26 vim
lrwxrwxrwx   1 root root       23 Apr 27  2018 vtrgb -> /etc/alternatives/vtrgb
-rw-r--r--   1 root root     4942 Feb  5  2018 wgetrc
drwxr-xr-x   2 root root     4096 Jan 20  2019 wildmidi
drwxr-xr-x   2 root root     4096 Aug 18 20:26 wpa_supplicant
drwxr-xr-x  11 root root     4096 Jan 20  2019 X11
drwxr-xr-x   5 root root     4096 Apr 29  2018 xdg
-rw-r--r--   1 root root      477 Mar 16  2018 zsh_command_not_found
len@len-Satellite-E45t-A:/etc$ cd resolvconf/
len@len-Satellite-E45t-A:/etc/resolvconf$ ls -al
total 20
drwxr-xr-x   3 root root  4096 Apr 26  2018 .
drwxr-xr-x 139 root root 12288 Sep 12 05:56 ..
drwxr-xr-x   2 root root  4096 Feb  6  2019 update-libc.d
len@len-Satellite-E45t-A:/etc/resolvconf$ cd update-libc.d/
len@len-Satellite-E45t-A:/etc/resolvconf/update-libc.d$ ls -al
total 12
drwxr-xr-x 2 root root 4096 Feb  6  2019 .
drwxr-xr-x 3 root root 4096 Apr 26  2018 ..
-rwxr-xr-x 1 root root  249 Feb  2  2018 avahi-daemon
len@len-Satellite-E45t-A:/etc/resolvconf/update-libc.d$ cat avahi-daemon
#!/bin/sh
#
# If we have an unicast .local domain, we immediately disable avahi to avoid
# conflicts with the multicast IP4LL .local domain

if [ -x /usr/lib/avahi/avahi-daemon-check-dns.sh ]; then
  exec /usr/lib/avahi/avahi-daemon-check-dns.sh
fi
len@len-Satellite-E45t-A:/etc/resolvconf/update-libc.d$
 
Old 09-12-2019, 02:07 PM   #19
michaelk
Moderator
 
Registered: Aug 2002
Posts: 18,928

Rep: Reputation: 2851Reputation: 2851Reputation: 2851Reputation: 2851Reputation: 2851Reputation: 2851Reputation: 2851Reputation: 2851Reputation: 2851Reputation: 2851Reputation: 2851
Quote:
lrwxrwxrwx 1 root root 27 Sep 10 22:46 resolv.conf -> /run/resolvconf/resolv.conf
Yes, that is your resolv.conf file. It just happens to be a link to another file in another directory but it does exist. Please post its contents.
 
Old 09-12-2019, 02:10 PM   #20
Firerat
Senior Member
 
Registered: Oct 2008
Distribution: Debian sid
Posts: 1,995

Rep: Reputation: 550Reputation: 550Reputation: 550Reputation: 550Reputation: 550Reputation: 550
ok

Code:
history | grep sudo
will give us an idea of what was edited/installed/done

do you remember doing anything to /etc/resolv.conf?

like "ln -sf ../run/resolvconf/resolv.conf /etc/resolv.conf"
that would explain the dangling link
and
Code:
sudo ln -sf ../run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
would restore it to Ubuntu18's default

if you installed ifupdown, you can remove that
Code:
sudo apt purge ifupdown
you can also undo the changes made to /etc/network/interfaces
the default is
Code:
# ifupdown has been replaced by netplan(5) on this system.  See
# /etc/netplan for current configuration.
# To re-enable ifupdown on this system, you can run:
#    sudo apt install ifupdown
essentially it is empty
 
Old 09-12-2019, 03:52 PM   #21
coderlen
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Firerat, well, guess what? I am online in Linux! All I did was fix the link, as you suggested:

Code:
sudo ln -sf ../run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
That did the trick.

Now, you have asked some other questions, which I would be happy to answer for you, as you have been so kind and helpful to me. Let me know if you do.

Now, the acid test: After rebooting, will I still connect to the Internet?
 
Old 09-12-2019, 04:05 PM   #22
coderlen
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It does indeed connect to the Internet after a reboot. Hurray! Thanks so much for your help, Firerat and michaelk. Of course, I would have had to a complete reinstall to get it working again. Now, at least I have a little better understaning of networking on Linux.
 
Old 09-12-2019, 04:09 PM   #23
Firerat
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Quote:
Originally Posted by coderlen View Post
Firerat, well, guess what? I am online in Linux! All I did was fix the link, as you suggested:

Code:
sudo ln -sf ../run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
That did the trick.

Now, you have asked some other questions, which I would be happy to answer for you, as you have been so kind and helpful to me. Let me know if you do.

Now, the acid test: After rebooting, will I still connect to the Internet?

Woot

nah, the other questions would have been to do with "history | grep sudo"
that was just to see what had been done, basically to undo them.
 
Old 09-12-2019, 10:23 PM   #24
coderlen
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michaelk, that was an excellent article you recommended, although it was a iittle above my head. Thanks for your posts.

Firerat, your patience and many posts are greatly appreciated. You really got me out of a jam. Thanks so much.
 
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