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.

Filter by
Sorted by
Tagged with
1 vote
2 answers
2k views

How can I install the driver for rtl8192eu USB 2.0?

I am using ubuntu-21.10-desktop-amd64 Please note that I don't have any networking capability at all in Linux. So for example, to install anything I need to use Windows 10 to download the archive etc. ...
21423's user avatar
  • 21
1 vote
1 answer
224 views

What is the significance of order in the device list of ip route output?

I have this output for ip r default via 10.0.0.1 dev enp0s20f0u1 proto static metric 1000 default via 10.0.0.1 dev wlan0 proto static metric 2000 10.0.0.0/24 dev wlan0 proto kernel scope link src 10....
Stephen Boston's user avatar
1 vote
1 answer
2k views

Ubuntu 20.04 with kernel 5.11.0-40-generic does not recognize intel wi-fi 6E ax210 160mhz

$ uname -r 5.11.0-40-generic $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04.3 LTS Release: 20.04 Codename: focal Thinkpad p14s, and bluetooth ...
quinn's user avatar
  • 265
1 vote
1 answer
4k views

How to change Ubuntu network setting by editing/creating config file?

In Ubuntu 20.04 desktop, there is a GUI network tool in All Settings -> Network. If I set a static IP to some network adapter, there will be a config file generated in /etc/NetworkManager/system-...
Felix Xu's user avatar
  • 180
1 vote
1 answer
192 views

WiFi sees some 5GHz AP's but not mine

I've got my router broadcasting two wifi networks - one on 2.4GHz and one on 5GHz. Using a wifi scanner on my phone, I can see that both networks are available: However when I scan for these ...
Vadim Peretokin's user avatar
1 vote
1 answer
99 views

"mate-network-properties" won't honor ignored-hosts address

I want to block a social media address. When I block it via echo "127.0.0.1 facebook.com" | sudo tee -a /etc/hosts > /dev/null works. But when I use mate-network-properties gui and ...
kenn's user avatar
  • 5,154
1 vote
2 answers
1k views

Installed Ubuntu 20.04 alongside Windows 11 (SecureBoot disabled), installed r8168 driver from Realtek site, but still no WiFi

I got a new laptop yesterday with Windows 10 pre-installed, which I then upgraded to Windows 11. I installed Ubuntu 20.04 via USB (I was prompted to enter a MOK key. Upon rebooting after the Ubuntu ...
niran90's user avatar
  • 113
1 vote
1 answer
3k views

If ifconfig is not installed, how does ubuntu tell you to install net-tools in order to use ifconfig? Why doesn't Debian do this? [duplicate]

If (as an example) net-tools package is not installed and I try to use ifconfig command, Ubuntu says Command 'ifconfig' not found, but can be installed with: sudo apt install net-tools How can Ubuntu ...
Ahnaf Tahmid Samin's user avatar
1 vote
1 answer
2k views

Where can I find the default IPv6 config location on Ubuntu 20.04 Server?

I just installed an Ubuntu Server 20.04 via the installation manager. I defined a static IPv4 address and left Ipv6 untouched. After starting the machine, I can see my static Ipv4 and also multiple ...
CptBuntler's user avatar
1 vote
1 answer
799 views

how to activate a new /etc/hosts instantly

I'm using a terminal command to replace the /etc/hosts - file. alias nonews="sudo -S chattr -i /etc/hosts < /etc/password_file && sudo -S cp /etc/hosts_all_blocked /etc/hosts < /etc/...
Thomas R's user avatar
  • 221
1 vote
3 answers
16k views

Wifi disappeared

Wifi disappeared from settings menu and does not give me an IP address. However: sudo lshw -C network will show the interface seems up and running: *-network description: ...
ubuntuUssser's user avatar
1 vote
1 answer
787 views

Unable to get networking working after changing motherboard

I have an SSD with Ubuntu Server 20.04, kernel 5.4.0-77 installed on it. I moved house and the SSD made the move, but the server itself didn't. I threw the SSD into a different machine for the time ...
Shawnsg's user avatar
  • 13
1 vote
1 answer
1k views

How to ssh into a remote computer

I have two laptops, one running Ubuntu (server) and another running Debian (client), and I want to use ssh to log in to the shh server. While on my router's network, using the private IP address of ...
puma's user avatar
  • 21
1 vote
2 answers
644 views

How can I host a local WiFi network which will show up in an Android's network manager?

I am trying to connect an NVIDIA Jetson Nano with an Intel Dual-Band Wireless-AC 8265 over WiFi directly to an Android smartphone. I can make the devices connect through an intermediary wireless ...
Timothy Kleinow's user avatar
1 vote
1 answer
4k views

Fix Fibre fc_host ports status "Linkdown"

I have two older servers. They are up and running with Ubuntu 20.04 LTS. Now I want to connect an HP 1040 SAN storage to it. ISCSI over TCP-Network seems to be not supportet by the storage, so i tried ...
Ari's user avatar
  • 139
1 vote
1 answer
353 views

Wi-Fi does not working in Dell Inspiron 5502 with Ubuntu 20.04

I bought a Dell Inspiron 5502 i5502-M40S. It comes with Windows 10 pre-installed, after some "exercise" I managed to install Ubuntu 20.04 in dual boot. To do this I changed from RAID to AHCI ...
Antônio Olinto Ávila da Silva's user avatar
1 vote
1 answer
2k views

Can't connect to open secure port on Ubuntu

I opened the 8443 port on which I run Clickhouse server. I can connect to SSH on 22 port, I can also connect to 8443 via SSH tunnel, however I can't connect normally to that host. I'm trying to ...
Dmitrij Kultasev's user avatar
1 vote
1 answer
1k views

OpenSSH showing different version from installed version on remote connection

On my server on digital ocean, I upgraded OpenSSH to version 8.6p1. user@server:~# ssh -V OpenSSH_8.6p1, OpenSSL 1.1.1 11 Sep 2018 But when I check the OpenSSH version from the remote client it is 7....
Faisal Manzer's user avatar
1 vote
1 answer
284 views

Wifi not working [ No wifi adpater found ubuntu 18.04 ]

I found many similar questions and followed this one. As per the accepted answer, in case the status of wireless interface listed as *-network UNCLAIMED, I should follow the steps to install new ...
y_159's user avatar
  • 175
1 vote
2 answers
2k views

Set network interface metric to a fixed value

I have a fixed IP camera which is configured on static IP and connecting using Ethernet (enp3s0). WiFi is disabled (from the GUI). Cellular is switched on and it is also on static IP (static IP is not ...
AliBhatti's user avatar
1 vote
1 answer
1k views

How to change the IP address of an installed printer? [duplicate]

I installed an HP printer from a local network. Now, for some reason, the internal address of the printer has changed from 10.0.0.3 to 10.0.0.2. I opened the printer setting, but cannot change the IP ...
Erel Segal-Halevi's user avatar
1 vote
1 answer
14k views

How to permanently save the content of /etc/resolv.conf

As I mentioned in the title, ctrl+s doesn't permanently save the content of that file, if I rebooted my machine I lost all the configuration I did in there, an help, please.
Mr.Robot's user avatar
1 vote
1 answer
1k views

How to assign the same static IP to a wired and wireless NIC?

I have a machine (18.04, will be 20.04 at some point) that has a wired NIC as well as a USB card with a wireless one. It is usually connected by cable, but sometimes the cable is disconnected (...
WoJ's user avatar
  • 1,315
1 vote
1 answer
610 views

Port Forwarding rule to make local machine accessible through WAN

I wish to set up a configuration on my home network on one of my machines. Namely, I wish to make it feasible to access it via ssh (the machine runs dropbear for ssh) but externally. Here's an "...
ex1led's user avatar
  • 155
1 vote
1 answer
7k views

What causes "RTNETLINK answers: No such process" when using ifdown command?

I am working with a 4-port NIC and I want to turn off all interfaces but one. I don't know if it is a problem or not, but when I turn off the third and the fourth interfaces with the ifdown command, ...
anmomu92's user avatar
1 vote
1 answer
889 views

How to prevent (or at least automatically fix) `avahi-daemon: running [ubuntu_comp_hostname.local]` getting replaced with version with `-2` appended?

I have this problem where this: #=> avahi-daemon: running [ubuntu_comp_hostname.local] keeps getting itself replaced with a version with a -2 appended: #=> avahi-daemon: running [...
Owen_AR's user avatar
  • 361
1 vote
2 answers
1k views

Broadcom BCM43228 failing on DELL Latitude E6230 running 20.04

I have a fresh install of 20.04 LTS on a DELL E6230 and the WiFi is failing. When I disconnect the wired connection, the WiFi does not show any networks to connect to. I have followed the ...
Dale Menken's user avatar
1 vote
2 answers
329 views

Network is unreachable after login

I have a weird problem: I'm using WiFi for my internet connection. It works flawlessly, until I decided to leave the computer for a while. When I come back, I login into it and unable to surf the ...
Inter Sys's user avatar
  • 111
1 vote
1 answer
369 views

Sudden DNS problem

Running 20.04. I have a networking problem that has just started today: I can't open new sites in Firefox. This is my desktop on my home network. Other machines connected to the network, both wired ...
James Barton's user avatar
1 vote
2 answers
369 views

How should I go about getting a wireless connection for my desktop when I have no access to ethernet?

For context, I recently dual-booted my PC from windows to also have the most recent version of Ubuntu. I am new to linux based distributions, so I am very much not comfortable with it yet. My current ...
Ariel's user avatar
  • 13
1 vote
1 answer
458 views

Wired Setting Missing and Ethernet Connection Not Working on Dual Boot Ubuntu 20.04 and Windows 10

I recently built a new pc and dual booted Windows 10 and Ubuntu 20.04 on them. My ethernet connection works in Windows 10 but does not work in Ubuntu. In addition, my the wired setting is missing in ...
Willingtolearn 's user avatar
1 vote
1 answer
1k views

USB Wifi Dongle changes MAC Address on every boot - How to prevent this?

Ubuntu 20.04.1 LTS runs on an Odroid C4 development board. WiFi works fine with an USB dongle with RTL8811AU chip, but the MAC address is different after each boot. How can I ensure that the MAC ...
elsni's user avatar
  • 123
1 vote
1 answer
273 views

Unable to make ethernet work

I tried to run sudo ifconfig eno1 up but still the wired network won't work. Checking further: $ sudo lshw -c network *-network description: Ethernet interface product: RTL8111/8168/...
cyberquarks's user avatar
1 vote
1 answer
2k views

hostapd vs netplan: wlan0 not added to bridge at boot

Like many people, I'm using a Raspberry Pi 4B running Ubuntu 20.10 arm64 as a LAN/wifi bridge, using hostapd and netplan. Everything works fine except that the bridge is not configured correctly when ...
Nate Eldredge's user avatar
1 vote
1 answer
1k views

I can't use wifi driver with Secure boot enabled

how are you, community. Today, I've got installing Ubuntu 20.04 and all is working fine, except that I can't use the Wifi adapter. The software manager says I have installed it. I have enabled Secure ...
Alexis's user avatar
  • 23
1 vote
2 answers
4k views

Ubuntu Server 20.4.1 *-network DISABLED

I had a working server this morning. Wanted to apply the lastest set up updates, but before I did, I decided to do a reboot just to clean things up. After the reboot.. then network did not come back. ...
user2437902's user avatar
1 vote
2 answers
4k views

How to specify a port number for DNS servers with netplan

Ubuntu 20.04 with netplan throws malformed address error when cloudflare dns over tls (1.1.1.1:853) is used. Netplan only excepts 1.1.1.1. Is there a way to configure DoT or DoH with netplan?
m0ng00se's user avatar
1 vote
1 answer
9k views

Ubuntu Server 20.04 LTS no internet using static IP for ethernet and dynamic for WIFI

I'm configuring a raspberry cluster using Ubuntu Server 64bits 20.04. I need a static ip for my master and the master will also share the internet from the wifi forwarding to the ethernet and then to ...
Fals's user avatar
  • 113
1 vote
1 answer
6k views

"Temporary failure in name resolution" after updating to 20.10

I just updated from 20.04 to 20.10 and am now getting no DNS with my wired network (no wireless on this computer): alpaca:adrian> ping www.google.com ping: www.google.com: Temporary failure in name ...
user69461's user avatar
1 vote
1 answer
228 views

Ubuntu 19.10 network problem with public IP - connects but cannot send anything (SYN_RECV) [closed]

I'm a linux newbie trying to setup a public IP address on ubuntu 19.10. My netplan file looks like this: # Let NetworkManager manage all devices on this system network: version: 2 renderer: ...
Michał Suliga's user avatar
1 vote
1 answer
9k views

Ubuntu 20.04 DNS not work after connect to VPN

I have Ubuntu 20.04.1 LTS. I added VPN config using this instruction. VPN is correctly added. When I connect to this VPN I can open only page with address IP. For example I can ping address 8.8.8.8 ...
michal's user avatar
  • 161
1 vote
1 answer
181 views

How to compensate for an unstable wifi connection in Ubuntu? (Many lost packets and timeouts)

My wifi connection usually works fine, but sometimes it becomes unstable. Many dropped pings, delays (up to 2000 ms) and sometimes duplicates. Sometimes wget can't resolve DNS or it displays a speed ...
ubuntu1520's user avatar
1 vote
2 answers
18k views

How can I SSH into another computer over USB?

I have a mini PC running Ubuntu server 20.04. I also have a laptop running Ubuntu desktop 20.04. I want to set up the mini PC so that if I connect a USB cable from it to my laptop, I can SSH into it ...
Jack M's user avatar
  • 1,310
1 vote
1 answer
1k views

No (easy) networking after upgrade to Xubuntu 20.04.1 LTS

After taking the option to upgrade to Xubuntu 20.04.1 LTS I no longer have any networking capability. E.g. Output of ping www.Google.com : ping: www.Google.com: Name or service unknown Output of ping ...
IainCunningham's user avatar
1 vote
1 answer
7k views

Ubuntu 20.04 says that Wi-Fi is connected but doesn't allow me to connect to the internet

I think this question has been asked multiple times all for different versions but I still have had no luck connecting to the internet. When I connect to my router from Wifi settings it gives me a ...
Fateh A.'s user avatar
  • 143
1 vote
1 answer
1k views

No internet upon ip change for server 20.04

I re-organized my router setup and everything got a new ip (I am discussing internal ip's here). So, I changed the server's static ip in netplan/50-cloud-init.yaml. network: version: 2 ethernets: ...
i9pp0's user avatar
  • 702
1 vote
1 answer
2k views

Wifi/Driver problem with RTL8723BE in Ubuntu 20.04.1 LTS

I've recently installed Ubuntu 20.04 LTS on a laptop. Everything was working seemingly fine except for a couple of freezes from time to time. They were due to many acpi errors, so I changed the grub ...
Voxeldoodle's user avatar
1 vote
1 answer
4k views

A MAC address is a string of zeros. Why?

When I execute: $ cat /sys/class/net/*/address I get: f4:b5:20:23:9a:a4 00:00:00:00:00:00 The 1st is my ethernet MAC address, and the 2nd is, I guess (I'm not an expert on those things), my computer'...
Carlos Gouveia's user avatar
1 vote
2 answers
1k views

Ubuntu Wifi keeps reconnecting even after router reconfiguring

I have ubuntu 20.04 installed, and, for a specific Wifi connection (the one I have in my home), I have the following problem: the wifi disconnects and reconnects after some time (probably every 3 or 5 ...
Madeyra's user avatar
  • 289
1 vote
1 answer
1k views

Failed to start Apply Kernel Variables - Cannot connect to ethernet with sudo dhclient enp2s0

My system dual boots Ubuntu 18.04 and Windows 10. Installed both last year on a new Dell laptop. No problems since then. Wasn't trying to upgrade the distribution as in other similar questions. I ...
PracticalKat's user avatar

1
136 137
138
139 140
461