I have Ubuntu 16.04 and all of a sudden my connection to the wifi stopped working. My tablet in same room continued to connect. I restarted and used different users on my account, and deleted my connection to the internet and re-authenticated several times.

When I would try to connect, and authenticate I would get an error: "connection activation failed", though now i forget where.

I saw this: Can't connect to WiFi with "Connection activation failed" error after upgrade from 14.04 -> 15.04

and it was suggested that I reinstall network-manager but that didn't work out of box so I did the unthinkable and did

sudo apt remove network-manager

without thinking. I try

sudo apt-get install network-manager

but obviously it can't connect to the internet and gives me this:

      Temporary failure resolving 'us.archive.ubuntu.com'
    Err:2 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 network-manager-gnome amd64 1.2.6-0ubuntu0.16.04.4
      Temporary failure resolving 'us.archive.ubuntu.com'
    Err:1 http://security.ubuntu.com/ubuntu xenial-security/main amd64 network-manager amd64 1.2.6-0ubuntu0.16.04.3
      Temporary failure resolving 'us.archive.ubuntu.com'
    E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/n/network-manager/network-manager_1.2.6-0ubuntu0.16.04.3_amd64.deb  Temporary failure resolving 'us.archive.ubuntu.com'

    E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/n/network-manager-applet/network-manager-gnome_1.2.6-0ubuntu0.16.04.4_amd64.deb  Temporary failure resolving 'us.archive.ubuntu.com'

    E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

so I downloaded the files at

http://security.ubuntu.com/ubuntu/pool/main/n/network-manager/network-manager_1.2.6-0ubuntu0.16.04.3_amd64.deb

http://us.archive.ubuntu.com/ubuntu/pool/main/n/network-manager-applet/network-manager-gnome_1.2.6-0ubuntu0.16.04.4_amd64.deb

And I don't know what to do with them or where to put them.

Note: I hadn't updated for a while (recovering from injury) and so maybe my network-manager was out of date.

It has been suggested to me that I boot from a LiveCD, but I wanted to ask if it was possible to just install the most current files.

I have recently updated (doing a "partial upgrade") when prompted on my Ubuntu 18.04.4 LTS and now in all browsers when I access anything, even just do a search, there is a delay of many seconds (mostly 20-30). It's driving my mad!

It's not DNS related, since I can use ping or dig and get immediate responses. The delayed behaviour is in firefox, chrome, brave and gab browsers. So it's something in the network stack I assume, but I don't even know where to begin.

/var/log/syslog shows nothing that seems to be causing this.

A problem I noticed in syslog:

Feb 20 13:07:56 roland-zenbook org.gnome.Shell.desktop[5218]: [6130:6134:0220/130756.669614:ERROR:ssl_client_socket_impl.cc(941)] handshake failed; returned -1, SSL error code 1, net_error -200

After disabling ipv6, the error is not in the log any more, but the response is still not as normal.

Any suggestions, hunches or magics I could try? :-)

EDIT: I have since upgrade my kernel to 5.3.0-40 and re-installed the Nvidia proprietary driver version 435. I'm currently running the Intel mode on my laptop, since the Nvidia mode freezes just after the grub2 boot menu.

I also installed Lubuntu/LXDE and it makes no difference, so the graphical environment I choose is not causing this.

I have now retested the browser and Firefox does not have the lag any more. The Chrome-based browsers however do. (Chromium, Chrome and Brave). I have disabled hardware acceleration in their configs, but it makes no difference.

Earlier today, I attempted to update my wireless drivers and, now my wireless has completely disappeared. At this point, I am willing to do anything, post any output, just to get it back. Can anyone assist? Thanks

Result of

lspci -nnk | grep 0280 -A3

04:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6235 [8086:088e] (rev 24)
        Subsystem: Intel Corporation Centrino Advanced-N 6235 AGN [8086:4060]

Result of

sudo modprobe iwlwifi && dmesg | grep iwl

[16721.465752] Loading modules backported from iwlwifi
[16721.465753] iwlwifi-stack-public:master:8324:9176b151

and

result of

rfkill list all

0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

I use Ubuntu 16:04 and I needed to buy a small usb wifi adapter as for some reason the built in wifi of my DELL laptop seems to pick the signal poorly.

The only problem now is that the built in signal also gets activated sometimes, when the laptop is closer to the wifi-source, and keeps reconnecting again, which is annoying. I just need to find a way to disable this built-in wifi and retain only the plug-in wifi.

I have a simple program that I call an ipsweep. All that it is supposed to do is to ping an IP address, and show the IPs under use.

This is what I did the first time:

#!/bin/bash
for ip in {1...254}; do
ping -c 1 $1.$ip
done

It worked, but it's showing information that I don't need. All I need is the IP addresses under use. It showed all this with each IP:

So I tried adding some filters like | grep "ping" | cut -d "" -f 2

#!/bin/bash
for ip in {1...254}; do
ping -c 1 $1.$ip | grep "ping" | cut -d "" -f 2 &
done

Now the console shows only the IPs, but it shows ALL the IPs, no matter if it are in user or not (I only need the ones under use, I repeat). I've been trying to solve this for 5 hours, but I'm still unable to it. I know that with an if this could be solved, but I don't know how to write it.

I'm pretty new in using MAAS (and juju) for my company internal Openstack deployment; In the past I used kolla-ansible.

More details on installation and environment: Ubuntu (server) 18.04.3 LTS (GNU/Linux 5.3.0-29-generic x86_64); MAAS version 2.6.1

We have a Dell Poweredge C6420, with 4 nodes, each of them provided with 2 Mellanox 100Gb adapters; Cause of we don't have a 100Gb capable switch to interconnect the nodes, in the past:

• First of all we have physically cross-connected the nodes
• (and then) We used Linux Bridge: Each node with a br0 and the 2 Mellanox adapters connected to it.

In this way we were able to interconnect the 4 nodes, avoiding loops by enabling STP on each br0. Everything worked fine, 4 vlans ran on that network configuration (one for Openstack internals endpoint, one for storage, one for swift, one for ceph cluster and so on).

After this (golden!) period of Kolla-ansible R&D, company decided to switch to Juju+Maas.

Now we are in trouble for replicating same configuration with MAAS (both cli and web dashboard). What we want to do (out-of-the-box) in MAAS is: configure one Linux Bridge, br0, and attach both network adapters of each node to it. But Maas permit to create one br0 for one interface and this is not exactly what we want.

We didn't found a way to do this. The only one way was to, use a cloud-init base64 encoded script and use MAAS cli (as documented on maas custom setup doc page). Unfortunatelly Curtin didn't work.

But, questions are:

1. How is possible to replicate the configuration described above out-of-the-box in Maas?
2. Even if we workaround the problem by using Maas cli and base64 encoded cloud-init script, when we'll deploy Openstack base bundle, is there a way to preserve this (handcrafted) network configuration? Or Juju deploy we'll destroy it?

Thanks in advance

I'm new to this site and this OS "Ubuntu"

so I have problems with wifi and bluetooth..

I just check the logs and finally think the problem is related to firmware..

dmesg | grep iwl
[    2.819550] iwlwifi 0000:00:14.3: loaded firmware version 34.0.0 op_mode iwlmvm
[    2.833065] iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x338
[    7.900012] iwlwifi 0000:00:14.3: Failed to load firmware chunk!
[    7.900015] iwlwifi 0000:00:14.3: iwlwifi transaction failed, dumping registers
[    7.900016] iwlwifi 0000:00:14.3: iwlwifi device config registers:
[    7.900050] iwlwifi 0000:00:14.3: 00000000: 34f08086 00100406 02800030 00800010 17114004 00000060 00000000 00000000
[    7.900051] iwlwifi 0000:00:14.3: 00000020: 00000000 00000000 00000000 00348086 00000000 000000c8 00000000 000001ff
[    7.900052] iwlwifi 0000:00:14.3: iwlwifi device memory mapped registers:
[    7.900086] iwlwifi 0000:00:14.3: 00000000: 00489008 00000040 00000000 00000000 00000000 00000000 00000000 00000000
[    7.900087] iwlwifi 0000:00:14.3: 00000020: 00000011 0c040005 00000332 d55555d5 d55555d5 d55555d5 80008040 001f0040
[    7.900106] iwlwifi 0000:00:14.3: Could not load the [0] uCode section
[    7.900110] iwlwifi 0000:00:14.3: Failed to start INIT ucode: -110
[    7.913089] iwlwifi 0000:00:14.3: Failing on timeout while stopping DMA channel 8 [0x0bad1122]
[    7.925547] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -110

dmesg|grep -i firmware
[    0.261195] pci 0000:00:1f.5: BAR 0: trying firmware assignment [mem 0xfe010000-0xfe010fff]
[    0.827494] [Firmware Bug]: Invalid critical threshold (0)
[    1.719365] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x4d5f02)
[    1.997497] iwlwifi 0000:00:14.3: loaded firmware version 34.0.0 op_mode iwlmvm
[    2.313386] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[    2.314629] bluetooth hci0: Direct firmware load for intel/ibt-19-32-1.sfi failed with error -2
[    2.314631] Bluetooth: hci0: Failed to load Intel firmware file (-2)
[    2.316386] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[    2.316393] bluetooth hci0: Direct firmware load for intel/ibt-19-32-1.sfi failed with error -2
[    2.316395] Bluetooth: hci0: Failed to load Intel firmware file (-2)
[    3.349840] rtl8192cu: Loading firmware rtlwifi/rtl8192cufw_TMSC.bin
[    7.136131] iwlwifi 0000:00:14.3: Failed to load firmware chunk!

rfkill list all
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
1: phy1: Wireless LAN
    Soft blocked: no
    Hard blocked: no

my laptop model is hp 15-cs3012tx and version of Ubuntu is 16.04 LTS I just searched of my adapter model, it says

Intel® Wireless-AC 9560 802.11a/b/g/n/ac (2x2) Wi-Fi® and Bluetooth® 5 Combo

so I just downloaded intel ac 9560 firmware to install

1. OVERVIEW

The file iwlwifi-5150-2.ucode provided in this package must be 
present on your system in order for the Intel Wireless WiFi Link
AGN driver for Linux (iwlagn) to operate on your system.

The "-2" in the filename reflects an interface/architecture version number.
It will change only when changes in new uCode releases make the new uCode
incompatible with earlier drivers.

On adapter initialization, and at varying times during the uptime of 
the adapter, the microcode is loaded into the memory on the network 
adapter.  The microcode provides the low level MAC features including 
radio control and high precision timing events (backoff, transmit, 
etc.) while also providing varying levels of packet filtering which can 
be used to keep the host from having to handle packets that are not of 
interest given the current operating mode of the device.

2. INSTALLATION

The iwlagn driver will look for the file iwlwifi-5150-2.ucode using the 
kernel's firmware_loader infrastructure.  In order to function 
correctly, you need to have this support enabled in your kernel.  When 
you configure the kernel, you can find this option in the following 
location:

        Device Drivers ->
                Generic Driver Options ->
                        Hotplug firmware loading support


You can determine if your kernel currently has firmware loader support 
by looking for the CONFIG_FW_LOADER definition on your kernel's 
.config.

In addition to having the firmware_loader support in your kernel, you 
must also have a working hotplug and udev infrastructure configured.  
The steps for installing and configuring hotplug and udev are very 
distribution specific. 

Once you have the firmware loader in place (or if you aren't sure and 
you just want to try things to see if it works), you need to install 
the microcode file into the appropriate location.

Where that appropriate location is depends (again) on your system 
distribution.  You can typically find this location by looking in the 
hotplug configuration file for your distro:

    % grep \"^FIRMWARE_DIR\" /etc/hotplug/firmware.agent

This should give you output like:

    FIRMWARE_DIR=/lib/firmware

If it lists more than one directory, you only need to put the 
microcode in one of them.  In the above example, installation is 
simply:

    % cp iwlwifi-5150-2.ucode /lib/firmware

You can now load the driver (see the INSTALL and README.iwlwifi provided with
the iwlwifi package for information on building and using that driver.)

this is the attached document with the firmware file

I typed the command and it showed like this

grep \"^FIRMWARE_DIR\" /etc/hotplug/firmware.agent
grep: /etc/hotplug/firmware.agent: No such file or directory

but in the document it was supposed to be like this

% grep \"^FIRMWARE_DIR\" /etc/hotplug/firmware.agent

This should give you output like:

    FIRMWARE_DIR=/lib/firmware

I can't install this firmware with the way above.. and I think this 9650 device is related to wifi and bluetooth..

could someone pls give me a hand to install this firmware..?

thank you for your hand in advance

edit) I also included logs with command dmesg|grep -i firmware

I am trying to turn off IPv6 autoconfig for my all interfaces (I have 4). I want to use

net.ipv6.conf.all.autoconf = 0

In the my sysctl config (under /etc/sysct.d) But the settings not applied for any interface, however for the net.ipv6.conf.all.autoconf parameter it works, so runnig the following command: `

sysctl -a | grep "net\.ipv6\.conf" | grep "autoconf"

net.ipv6.conf.all.autoconf = 0
net.ipv6.conf.eth0.autoconf = 1
net.ipv6.conf.eth1.autoconf = 1
net.ipv6.conf.eth2.autoconf = 1
net.ipv6.conf.eth3.autoconf = 1

Then I tried with on the fly setting with

sysctl -w net.ipv6.conf.all.autoconf=0

But neither its working. Do you know any workaround for this? The reasons why I didn't want to do it by one by one (net.ipv6.conf.eth3.autoconf = 0 manually), because sometimes I have more interfaces too (these are just not connected always)

I'm in homeoffice and while I have set up a stable VPN connection through the Network Manager, its speed is very limited. I have a 1 GBit connection at home, while the VPN connection at the moment only offers 10 MBit.

While certain services have to go through VPN connection, most of the traffic could bypass it just fine as all the VPN would do is to only slow things down. (I'm looking esp. at public data-intensive services like downloading images from the official docker hub or npm registry. Yet just for the sake of setting it up, let's take a service like fast.com.)

How can I whitelist certain websites to make use of the VPN connection or blacklist other sites not to use the VPN connection?

I've set up Ubuntu Server most as a storage thing as I do website and software development as well as various other things so set this up as a way to store all of my stuff as well as my families stuff so things are all in one place.

First Problem I've had a couple of issues that I can't seem to figure out so I'll do my best to describe them here. My first problem is that I was trying to set up remote desktop into Ubuntu from Windows 10. I did a bit of research on it and I was going to use Windows Remote Desktop to remote into the server. The issue I'm having is my permissions seem to be wrong through the XRDP. Using the server directly is perfectly fine however when I connect from Windows 10 it seems I have less priviledges, for example I cannot mount extra drives, run terminal commands etc.

Second Problem The server has 3 drives, one that runs Ubuntu and 2 that are storage drives, I have been having an issue keeping the 2 drives mounted, if it logs out or restarts etc then they wont remount themselves even though I have set them to automatically mount. Before I redid my room layout I had a separate keyboard mouse and monitor for the server, I was able to easily move files between Windows 10, Ubuntu and my iMac. For some reason since I've put everything back in, I set the storage drives with local network shares so I could map them on my Windows 10 machine and copy files that way however everytime the machine restarts or logs out, the local network shares get removed and I have to do them again, something I cannot do through XRDP, I can't seem to figure out how to keep them shared perminantly.

Third Problem When I have been able to get in there are some things I'm unsure of and wanted to clarify:

As soon as I log in, I get prompted to authenticate colour profiles, this can be 4+ popups but when I type my password in all of them and then the remote desktop connection simply closes with no errors or anything. I've looked into ways to edit the files to stop the popups coming up however whenever I open the files they are read-only and I can't find a way to edit and save them. This one kind of links with the permissions error.

One more thing going on the look, some things seem different for example in XRDP when I am connected, there is no dock, have to click Activities in the top left corner, The files icon no longer uses "Files" it uses Nautilus - is this normal?

I have not used any form of Linux in quite a while so I'm still trying to get familiar with it again so I do apologise if these are easy to answer questions and can be found in documentation, I did struggle to find relative and up to date information on most of it, either seems some of the stuff I found were out of date or have not been fixed as they still seem to be having problems.

Thanks Rob

I have a Ubuntu Server 18 machine with two ethernet interfaces (virtual for testing, but bridged to physical adapters on the host). One enp0s3 (192.168.1.0/24 network) with an internet connection, over which I used pptp-linux to connect a VPN ppp0 (10.0.0.0/8 network), and confirmed working. The other adapter enp0s8 will have some other devices with a network switch, no router/DHCP.

I want to bridge ppp0 and enp0s8 so that these devices act like they were physically on the remote network, using 10.0.0.0/8 IP addresses etc.

Most examples I found seemed to only have one interfaces in the netplan (libvirtd?), so I tried giving it both:

network:
  version: 2
  renderer: networkd
  ethernets:
    enp0s3:
      dhcp4: yes
      dhcp6: yes
    enp0s8:
      dhcp4: yes
      dhcp6: yes
#    ppp0:
#      dhcp4: yes
#      dhcp6: yes
  bridges:
    br0:
      interfaces: [enp0s8, ppp0]
      dhcp4: yes
      dhcp6: yes

But it seems to not understand this:

$ sudo netplan generate
/etc/netplan/01-netcfg.yaml:15:28: Error in network definition: br0: interface 'ppp0' is not defined
      interfaces: [enp0s8, ppp0]
                           ^

Adding ppp0 there gets rid of the error, but breaks the VPN connection.

With remote working due to coronavirus, I am working at home, and my local kubernetes dns resolution is failing.

when I type:

nslookup localhost

I get:

Server:     127.0.0.53
Address:    127.0.0.53#53

Non-authoritative answer:
localhost.numericable.fr    canonical name = nc-ass-vip.sdv.fr.
Name:   nc-ass-vip.sdv.fr
Address: 212.95.74.75

and this is messing around with kubernetes dns resolution.

How should I remove the suffix .numericable.fr ( my ISP )

I am running on Ubuntu 19.04

I need to use a VPN that uses the Checkpoint SNX technology. It's quite finicky, but until now I've always managed to get it to run. (I've run this VPN on Manjaro and on a Mac). However, I am not able to get it to run on my Ubuntu 19.10.

As far as I understand, snx is installed on the local machine. this is the binary controls the actual connection with the server. Older versions of this binary could be used to directly connect to the VPN, however they removed this feature (while leaving the command line options there, which makes you think you can use it, but it doesn't work) from version 800007075. The newer versions need to be started from a Java web applet which is exactly what the ssl-vpn website I want to connect does, however it's 2020 and no modern web browser supports Java anymore. Therefore one has to install old versions of Java and a web browser that still has support for Java web applets.

I'll go through the things I've tried to get it to run. Maybe someone can point out something I've missed.

1. Use an old version of the snx binary (https://unix.stackexchange.com/questions/477689/linux-checkpoint-snx-tool-configuration-issues). There are some old snx binaries still floating around, and if one installs a version that is sufficiently old, the CLI will actually work.

My result: it told me its connected, but my public IP didn't change. neither did my ISP (I know which ISP i have at home, and which ISP the other network has, but its always showing the home ISP).

My assumption why it doesn't work: I think maybe the old snx binary is blocked from connecting, or my VPN target doesn't allow connections from the CLI (I don't know if this is actually possible to restrict).

2. I installed the Oracle Java 8 (which in itself is a challenge since its reached its EOL and you need an Oracle account do download the JDK. however, for this application we only need the jre, which can be found with some digging). Then I linked the Java executable to the mozilla folder (How to install the Java plugin for Firefox?), however Firefox blocks all Java applets, so I needed a different browser. I tried Waterfox, but couldn't get it to work, then tried palemoon and that actually works. I get the correct Java version if I try to check my Java version at the java website. So palemoon is running java, and it works.

If I try to connect using palemoon, I get a message that Checkpoint Mobile Agent is not installed and a link to download a shell script that installs the checkpoint agent. I download that, install it and get the same error again. I tried installing as normal user and as root (with sudo), restarting and relogging after install. I did also check to see if the website was allowed to run Java, and it is.

Result: I get the same webpage telling me to install the checkpoint agent.

My assumption why it doesn't work: there is a problem somewhere in the communication between the webpage and the java applet or the java applet and the command line.

3. There is one other way to try and get at the VPN (as far as I am aware of): https://github.com/schlatterbeck/snxvpn. This is a python package that basically emulates the webpage and starts the Java applet without the web browser to run snx. It installs a binary, snxconnect that does the magic, however when I try and run that I get:

ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1076)

Researching this led me to believe that the root ca certificate is not in the certificate list that the vpn page is using. so i checked the vpn page, found the certificate that is used there and looked into my local certificates to see if it was there, and it actually is.

Result: Python tells me my certificate is not available. I tried this from within conda and directly on my machine (without the venv, using pip3). Tried to install different versions of certifi through conda, but I had no luck either.

My assumption why it doesn't work: There's some problem with the certificate maybe? Maybe Python is reading an old certificate?

So I'm stuck. This is a rather long post, i know, but I've tried a lot of things, and I am lost as to how to solve these issues.

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 19.10
Release:        19.10
Codename:       eoan

$ snx
Check Point's Linux SNX
build 800008063

I'm shopping for a USB-C ethernet adapter compatible with all OS. Is there a way to verify it will work for lubuntu or ubuntu prior to purchase?

Techkey's description says "Supported Operating Systems: Windows XP and above(32/64-bit), Mac OS X10.6 and above", but does not mention the linux kernel. (A different search result explicitly stated manual installation would be required for linux 4.8 and prior, alerting me to potential incompatibility.)

Flujo's description says "OTG device, Used with no external drivers or power required."

So is Flujo's more likely to work than Techkey's? What do you look for?

I want to set up a headless server and connect to it from a laptop (Windows). It is running Kubuntu 15.04 and I installed X11vnc by this description:

https://help.ubuntu.com/community/VNC/Servers#Have_x11vnc_start_automatically_via_systemd_in_any_environment_.28Vivid.2B-.29

After a reboot the service is enabled and active (I think?), but I can not connect from the laptop using UltraVNC.

Only when I run

x11vnc -auth guess -forever -loop -noxdamage -repeat -rfbauth /home/USERNAME/.vnc/passwd -rfbport 5900 -shared

in a terminal I can connect to the server with UltraVNC.

I don´t want to issue this command everytime I want to the server. I want to be able to connect to server after a reboot without doing anything at the server.

Any ideas what goes wrong?

I'm trying to add a new OpenVPN connection on a fully-updated Ubuntu 19.10 PC, but the Add button uptop is grayed out:

I already tried to:

zane@zane-pc:~$ sudo apt-get install network-manager-openvpn network-manager-openvpn-gnome
Reading package lists... Done
Building dependency tree       
Reading state information... Done
network-manager-openvpn is already the newest version (1.8.10-1).
network-manager-openvpn-gnome is already the newest version (1.8.10-1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
zane@zane-pc:~$ sudo systemctl restart network-manager
zane@zane-pc:~$ sudo service openvpn restart

What else?

I'm using a server running Ubuntu to monitor a number of servers in various network zones in my hosting environment. To allow this server to contact all the servers it monitors I manually added a number of routes using ip route.

A few days ago my monitoring tools stopped working because all the servers became unreachable. On further investigation, this was because all the routes I'd added to the routing table had disappeared. I've checked kern.log and syslog and can't see anything unusual at the time connectivity was lost, and this server hasn't restarted since it was first provisioned.

Does anyone have any ideas as to what caused this to happen, or where I could go to get more information?

I just installed ubuntu to my X1 Carbon 7th. While installing with the live USB, the wifi was working very well. Now, after the installation is finished, it no longer works. Here are my network logs. My network card is an Intel AC9560.

Is there some thing I can search for and install via apt-get or something similar to get my RTL8125 2.5GbE Controller working on Ubuntu 18.04 LTS

I recently installed the latest Ubuntu 19.10 and my E3121 USB Data stopped working in Ubuntu. It throws an error while installing the driver. I have attached the screenshot

I have tried almost all the solutions available on the internet including this accepted answer

but nothing works. It was working fine in ubuntu 16. The problem started after upgrading to ubuntu 19.10. In ubuntu 16 I was getting a network options menu like this

I could see the mobile broadband option there. But in Ubuntu 19.10 this menu itself is not there. Someone please help me!!