Questions tagged [networking]

Computer networking is the connection two or more computing devices for transmitting and sharing data. The devices use common communication protocols over a physical or wireless connection. Use this tag for questions about managing and using network connectivity on an Ubuntu system.

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Ubuntu network plummet during snap install

I recently installed Ubuntu alongside Windows 10 and there is no network issue on Windows. This happens on both Ubuntu 18.04 LTS and 20.04 LTS that I have tried (currently on 18.04). The connection ...
Kenny's user avatar
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1 answer
9k views

Ubuntu 20.04 LTS unreachable, although it is connected to network

Excuse my basic question, I have installed Ubuntu Server 20.04 LTS on an old laptop to use it as a home-server for testing and other learning stuff. It was working fine, except few days ago it started ...
Abdullah's user avatar
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1 answer
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Wifi only works after restarting from windows

I'm encountering a very weird bug on my dual boot system. I'm using Ubuntu 20.04 LTS and Windows 10. The issue is, that whenever I directly boot onto Ubuntu, my WiFi module is recognized, but not ...
ZenBuntu's user avatar
1 vote
1 answer
133 views

Webdav Nautilus 16.04 Configuration

The instructions to setup a webdav folder indicate add the webdav URL in the dialogue box: http and https prefixes fail to 'light up' (enable) the connect button. smb prefixes enable the connect ...
gatorback's user avatar
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What exactly is an FQDA and how does it relate to multiple dynamic domain addresses?

I've had a Linux box running here for years. It is pointed to by first.second.net and first1.second.net as rented from no-ip, and there's a script to tell no-ip what the outside IP address is for my ...
help-wanted's user avatar
2 votes
0 answers
292 views

Need to upgrade/diagnose my wifi driver (Intel Wireless-AC 9560) on Ubuntu 20.04

My current problems: There's a problem with wifi on Ubuntu 20.04, that's not present on my Windows 10 boot. I have 30% packet loss pinging my router (~0% on windows) It gets worse upon plugging in my ...
Arnav Bansal's user avatar
2 votes
1 answer
5k views

WiFi (rtl8723be driver) is gone in ubuntu 20.04

When I tried to use wifi in my hp laptop after sleep, it was showing netwoks but was not connecting to any of them. So I rebooted the system hoping that problem will be fixed. But it got worse. Now ...
Yogi Katba's user avatar
1 vote
0 answers
523 views

Archer T4U v3 Wifi problems

I just did a fresh install of Ubuntu 20.04 LTS, and I'm facing some problems with my USB Wifi dongle, Archer T4U v3. Here is my wireless info. The official TP Link driver doesn't work, probably ...
J.W Ngo's user avatar
  • 11
1 vote
1 answer
159 views

Network issue on Lubuntu 20.04

Currently, I installed Lubuntu 20.04 on my Thinkpad Lenovo laptop. sometimes the networks became very slow, I command a ping 1.1.1.1 or ping 4.2.2.4 but it falls in a very deep delay. parallelly, I ...
AmerllicA's user avatar
  • 549
4 votes
2 answers
22k views

How to permanently change the IP address of Ubuntu with CLI only?

I have a ubuntu machine and want to change the IP address, the requirements are as follow:- using only cli to change the IP address, since the HW is not accessible and the script is changing the IP ...
rahul  Kushwaha's user avatar
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2 answers
8k views

Accessing Windows 10 files from Ubuntu 20.04

I am a novice Linux user. I have a Raspberry Pi 4 and have used Raspbian on it and have had no problems accessing my Windows 10 files shares. I wanted to try Ubuntu to see how it compares. I tried the ...
JohnW's user avatar
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1 answer
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NetGear A6100 AC600 wireless adapter not working in Ubuntu 20.04. Worked fine in 18.04. Not same problem as previously

Firstly, I know very well there are answers to this already. But, in my case, it is installed and shows in the terminal as such Bus 001 Device 007: ID 0846:9052 NetGear, Inc. A6100 AC600 DB Wireless ...
Skull Kid's user avatar
1 vote
1 answer
396 views

How to create a hotspot in Ubuntu to connect an Android phone?

I am able to create a WiFi hotspot from the settings panel in Ubuntu 19.10. My Android phone is able to see that network, but on trying to connect to it with exact credentials, the phone is unable to ...
Puspam's user avatar
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1 answer
11k views

Networking on Ubuntu 20.04

Up until this morning my new installation of Ubuntu 20.04 LTS was working just fine. Then all of a sudden networking stopped working. I first noticed that my chrome browser wasn't working properly. ...
James Read's user avatar
2 votes
0 answers
3k views

How to send and receive SMS and calls using USB modem?

I have recently got a Huawei e3372 4G LTE USB modem and I have inserted a Jio SIM into it. I had configured it properly and can use the data connection well, but I cannot understand how to send and ...
Puspam's user avatar
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Wireless dropping every 10 min on dell xps 7590 after upgrade to 20.04. requires stopping wifi and restarting it repeatedly. Worked fine in 19.10

lspci -knn | grep Net -A3; rfkill list 3b:00.0 Network controller [0280]: Intel Corporation Wi-Fi 6 AX200 [8086:2723] (rev 1a) Subsystem: Bigfoot Networks, Inc. Wi-Fi 6 AX200 [1a56:1654] ...
Grotus Antoninus's user avatar
3 votes
2 answers
28k views

Linux Ubuntu Server 20.04 LTS: 'Network Unreachable'

I honestly don't have a clue what the issue is as i'm fairly new to Linux and networking. It was working fine for the past month but now it just doesn't want to connect to the internet at all. I've ...
Daniel H's user avatar
1 vote
0 answers
785 views

Configure huawei e3372 4g dongle with Singtel Hi card 3g data on Ubuntu 18.04/Jetson nano project

I am trying to get the huawei 4g Dongle to work on my jetson nano in order to provide network for me. NVIDIA Jetson TX1 L4T 32.3.1 [ JetPack 4.3 ] Ubuntu 18.04.4 LTS Kernel Version: 4.9.140-tegra ...
Papa U's user avatar
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1 vote
0 answers
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LTE 4G module, connected, ping ok, dns ok, but can't browse internet

I've been using kubuntu for quite a while, before posting here I made a lot of research but wasn't able to solve my problem, hope someone here can help me getting things to work. I have this Lenovo ...
attix84's user avatar
  • 11
1 vote
1 answer
217 views

Ubuntu migrated VM NIC not up on boot - CloudInit?

I've just migrated my Reverse Proxy (Ubuntu 18.04/NGINX) VM from Hyper-V to ESX All seems to work ok, except the new VM no longer uses eth0 It has a new interface ens160 from the new NIC I've made a ...
Scepticalist's user avatar
8 votes
1 answer
5k views

Wifi is slow and unstable on ubuntu 20.04 dual boot (DELL XPS-L502X)

I am using a Dell XPS l502x laptop dual booted with Windows 10 and Ubuntu 20.04. The internet speed on Windows is fast and stable while it is very slow and unstable while I use Ubuntu, it keeps on ...
Sreenath pradeep's user avatar
2 votes
0 answers
1k views

iftop never stops working

I recently learned about iftop and used it for monitoring my wifi data usage few times today. sudo iftop -i wlp2s0 is how I call it. After 4-5 opening closing of iftop, I figured out that my ...
muyustan's user avatar
  • 268
2 votes
0 answers
910 views

Missing 802.1q module from Ubuntu 18.04

I have just installed a fresh copy of Ubuntu 18.04 LTS and I needed to add support for vlan tagging. So I did follow the usual wiki and then did, apt install vlan and then when trying to load / ...
dpsguard's user avatar
13 votes
4 answers
22k views

DNS resolver stopped working after upgrade to 20.04

Just after Ubuntu upgrade to 20.04 /etc/resolv.conf contains: nameserver 127.0.2.1 and it does not work. It works after changing to: nameserver 127.0.0.53 But it is overridden after each restart ...
Marcin Skórzewski's user avatar
0 votes
1 answer
297 views

How to monitor total data received/sent for current Wi-Fi session?

Like in Windows OS, I look for a way to see how much data has been used since I connected to a Wi-Fi network. I only came accross with vnstat, however, either it cannot provide what I want, or I could ...
muyustan's user avatar
  • 268
0 votes
0 answers
538 views

Qualcomm Atheros 8151 ethernet seems broken with kernel 5.4 on Ubuntu 20.04

I recently upgraded from Ubuntu 19.10 to Ubuntu 20.04 LTS, and it seems that the upgraded kernel has broken the ethernet. The previous kernel (5.3.0-53-generic) is still able to be booted from, and ...
Jack Hayes's user avatar
0 votes
1 answer
1k views

Cisco VPN not connecting to internet

I am trying to connect to my office vpn. When I try to connect with Cisco Anyconnect Client it does connect but it restricts only the private sites of office. Is there some way I could open other ...
Aravind S's user avatar
4 votes
1 answer
15k views

Ubuntu 20.04 "Temporary failure in name resolution" - recently reinstalled

I rent a vps from contabo for about half a year now, it worked fine until now, because it started producing "Temporary failure in name resolution" errors. I read that this is a DNS error, I tried ...
Áron Németh's user avatar
3 votes
1 answer
415 views

Ubuntu transmits TTL 0 multicast packets

IP packets with TTL 0 shall not leave host. But when I start application which multicasts UDP packets with TTL 0, I see packets with TTL 0 leaving host for few seconds, and coming to normal behavior ...
nullptr's user avatar
  • 151
0 votes
1 answer
582 views

Connecting to VMWare Workstation Server crashes the service

I am unsure whether this question belongs here, on Super User, or on Server Fault, so if it is in the wrong place I apologize. I have two systems involved here: an Ubuntu 20.04 LTS system and a ...
Tyll'a's user avatar
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1 vote
0 answers
68 views

Is there a personal firewall package/software with GUI available for Ubuntu desktop 20.04?

A tool with similar GUI to glass-wire for windows to Allow & Block network connections by particular App and IP Good to have Features are GUI showing live network traffic GUI to see the network ...
Aravinth's user avatar
  • 637
0 votes
0 answers
31 views

Cirrus Scale old half height server RJ45 network device not available on Ubuntu 20.04 install

I just installed Ubuntu 20.04 ARM on an old Cirrusscale server, and the network device handle for the primary RJ45 connector does not come up, so I cannot simply plug into the LAN I am on. This is a ...
user3713271's user avatar
1 vote
0 answers
31 views

Port Forwarding Ubuntu to Debian server

I have xxx Ubuntu 18.4 Desktop which is connected to the Internet and have a Debian Server which is not connected to the Internet directly but hosting a cacti server on the same network with different ...
Sayeed's user avatar
  • 11
1 vote
2 answers
2k views

Cannot use apt/curl/wget/git but can Ping

I have a raspberry pi running ubuntu server 20 and cannot connect to the internet, but can use ping. This question has been asked by many before, however the solutions provided in those questions do ...
Danny's user avatar
  • 31
0 votes
1 answer
920 views

Can't use Wi-Fi in Ubuntu 20.04

My laptop is Lenovo Legion Y530 (i7 8th - 16GB ram - GTX1050). I'm running Ubuntu 20.04 for it and I was had a trouble with Wi-Fi. When I turn on Ubuntu, Wi-Fi doesn't found any modem. I tried: ...
Văn Duy Cát Đoàn's user avatar
0 votes
0 answers
177 views

My Ubuntu 18.04 Virtualbox machine is suddenly unable to connect to my network

I've been using this machine for a few months now and I've never run into this sort of issue. I am fairly new to both Ubuntu and VM's, so maybe I'm missing something obvious? I've read quite a few ...
Terence Patane-Ronan's user avatar
0 votes
1 answer
5k views

Can I share my internet connection with my nintendo switch over USB?

I have my office quite a distance away from my wifi AP, with my desktop connected with a single ethernet cable, and the game console docked in the same room. Right now, in order to give it internet, ...
metichi's user avatar
  • 897
2 votes
0 answers
847 views

Ubuntu 20.04 wifi not working Intel 6 X200

I updated my ubuntu today to 20.04 LTS but somehow this broke my wifi. It worked on the previous versions. I started with 19.10 and used the updater to update when new updates came out. My laptop ...
Karbonkel's user avatar
1 vote
1 answer
41 views

ssh porxy with key validation

we have so many servers in our company and every time that some one new joins the team we have to add his/her SSH key to all the nodes and every time he/she leaves we also have to remove that key from ...
Arshia Akhavan's user avatar
9 votes
2 answers
30k views

How to configure wpa_supplicant in Ubuntu server 20.04

For esoteric reasons I have a server which only has WiFi access to the network. By copying the necessary dpkg files on a removable drive I've managed to install wpa_supplicant. The thing that's ...
Philip Couling's user avatar
1 vote
0 answers
292 views

Can't use VPN feature from Network manager in Lubuntu

In Lubuntu 18.04.4 LTS, I am unable to use "Add vpn" option available in network manager, in right bottom panel where network manager shortcut is located, there is an option to add vpn and I am unable ...
Patel S.S.'s user avatar
4 votes
1 answer
2k views

KDE CONNECT issue on KUBUNTU 20.04

After upgrade to Kubuntu Focal Fossa, this app doesn't find my phone. My topic is also related to these: Connection problem with KDE Connect KDE Connect - Main phone and Desktop cant see each other -...
Плодомир Зеленчуков's user avatar
1 vote
0 answers
305 views

New to Ubuntu. WIFI suspends and laptop hangs

Being a Newbie to the LINUX world, excitement is filled within me to learn more and more. And, probably the Ubuntu 20.04 installed on my laptop understands me well. LOL! Guys, my WIFI gets ...
Dipendra Kumar Sahay's user avatar
0 votes
1 answer
3k views

Convert .iso to .qcow2 [duplicate]

I have ubuntu20.04 lts iso file downloaded from ubuntu website. Can you please guide to convert the iso file into qcow2 file. For instance I need the file ubuntu.qcow2 to be made from ubuntu.iso
user8856103's user avatar
0 votes
0 answers
75 views

How do I block ips from accessing my sever with UFW

I want to try to block my computer's IP (192.168.0.3) as a test from accessing anything on my server, and more importantly, my website, when I use ufw deny 192.168.0.3 it says Rule added, After ...
Nate's user avatar
  • 530
3 votes
3 answers
7k views

I clean installed 20.04 LTS but now I have no network

I was running 16.04 LTS (32 bit) And decided to upgrade to 20.04 LTS. I removed the drive with 16.04 on it and installed a new SSD. I installed via DVD from downloaded iso. Once it is installed and I ...
Jason Beveridge's user avatar
2 votes
0 answers
4k views

OpenVPN: autonegotiation is unset or enabled, the speed and duplex are not writable

I'm trying to install OpenVpnServer on Lubuntu 20.04. I'm not so expert with Linux, so I make many errors. At last I had an "almost working" OpenVpnServer installation, this is (hope so) the last ...
Salrandazzo's user avatar
0 votes
1 answer
55 views

Samba server permission

I would like to know how can I enable this option to ask every time user name and password when user is tried to access share folder from Linux machine. For instance I have setup a shared folder on ...
shahzad m.yousuf's user avatar
0 votes
1 answer
345 views

NordVPN Setup using Settings & Network Manager

I have installed NordVPN on 18.04 LTS, however, I cannot enable it under network settings. I know it is running in the background as I get messages concerning my IP addresses. It installed and is ...
Bill  McLellan's user avatar
0 votes
2 answers
9k views

Install mercusys wifi adapter in Ubuntu 20.04

I am trying to install the wifi adapter for the Mercusys mw300uh. lbusb output: Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 ...
Frostfox's user avatar

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