Questions tagged [network-manager]

NetworkManager is the default networking suite for Ubuntu. It is a set of co-operative tools developed by GNOME. The NetworkManager service can be controlled using the nmcli tool (Network Manager Command Line Interface) as well as by its GUI.

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Sudden problem with WiFi internet access with one specific Ubuntu 22.04 device with one specific router

I have an Ubuntu 22.04.4 LTS (with Intel Wi-Fi 6 AX201) that suddenly it just can't access the internet with my home WiFi. It was completely unexpected because it was working fine up until now, and ...
0 votes
1 answer
11 views

ip-config-unavailable DHCP error from NetworkManager

Overview and Environment I recently set up a new VirtualBox VM and ran into some strange network behavior. The machine is running Ubuntu 22.04 and after installing the virtualbox guest additions, my I ...
0 votes
1 answer
4k views

Temporary failure in (DNS) Name Resolution / 20.04

"Temporary failure in (DNS) Name Resolution" Background: I work in healthcare security with approximately ~125 servers across a dozen clients across the US The appliances are both physical ...
2 votes
1 answer
4k views

Network Manager missing after update: no connectivity

After an update and restart, I found that the network icon on the top is missing and so, I cannot connect to LAN, wifi, USB modem, nothing. Now, I am booting from a Live USB, then chrooted to my ...
8 votes
1 answer
18k views

Virtual Machine Ubuntu 20.04 LTS : connect: Network is unreachable

I am new to linux and networking and today I have a "connect: Network is unreachable" when executing ping or sudo apt commands. I have seen some similar questions but still don't have a clue ...
3 votes
2 answers
12k views

Ubuntu 18.04 - No Wifi networks found

I have Ubuntu 18.04 Dual booting with Windows 10 on my HP-EliteBook-745-G2, and for some reason, I cannot seem to find WiFi networks through my WiFi adapter, but Ethernet works (however, Ethernet ...
5 votes
10 answers
19k views

Unable to connect with the hotspot created on ubuntu

I am using Ubuntu 22.04.1 LTS desktop. I want to share the ethernet connection via wifi hotspot on my laptop. After turning on the hotspot, I am not able to connect any device from the hotspot, it ...
0 votes
0 answers
18 views

How to reactivate the network manager when the PC does not have access to the internet?

The day before yesterday I installed the proprietary NVIDIA 535 driver and yesterday when I turned on the laptop, the place to log in did not appear. I managed to use GRUB to access the terminal and ...
4 votes
3 answers
9k views

I can't connect to VPN under Ubuntu, what is possible on Windows

I was provided with an access to the VPN server. All I got were server's IP, username and password. Under Windows connecting to the server was easy - I just had to type the information I received. ...
2 votes
1 answer
608 views

Manually Disable Wifi before suspend

i'm running Ubuntu 18.10 with Gnome - Suspend to Ram isn't working. my syslog told me that wpa_supllicant refuses to freeze. I already tried a couple fixes but none are working. Most of them are ...
0 votes
0 answers
28 views

Script ideas for configuring VPN connection

After some bad crashes of my system, I decided to take a more organized approach and develop a bash script that will handle most of the things I tend to configure manually after a fresh installation (...
2 votes
1 answer
4k views

dnsmasq unrecognized command

I'm attempting to run a script which calls service dnsmasq restart service dnsmasq restart dnsmasq: unrecognized service No matter what I call for dnsmasq, it gives me the "unrecognized service" ...
29 votes
8 answers
82k views

Editing network interfaces without system rebooting

I'd like to make some changes to my networking configuration by editing my /etc/network/interfaces file. What's the cleanest way to make changes to this file and have them take effect, without having ...
0 votes
0 answers
32 views

Wifi disconnecting after some time in Ubuntu 22.04.4 LTS, REL8822 CE

I have a problem with wifi connection, the wifi is disconnecting after some time. The wifi is connecting if I restart the pc and after some time disconnecting again. I ran the command: sudo dmsg I ...
0 votes
0 answers
28 views

Network Manager keeps crashing

When I manually try to turn off my WiFi or switch network from the system tray, NetworkManager crashes and I get this NetworkManager needs to be running I followed a solution from here Ask Ubuntu | ...
2 votes
3 answers
4k views

Quectel EM120R_GL modem seems to work but SIM missing or not detected

This card has two SIMs, SIM0 (or whatever number) and SIM1. SIM0 is eSIM and the default SIM, SIM1 is physical SIM inside the slot. You need switch SIM0 to SIM1. This issue has been discussed before. ...
6 votes
3 answers
18k views

Ubuntu 20.04 - network DISABLED

I have Ubuntu 20.04 on a Dell XPS-13-9370. Things were fine but today my wifi stopped working after I disconnected of a vpn. I don't have dual boot, only ubuntu. From the Wi-Fi settings panel I see ...
160 votes
4 answers
461k views

How can I display the list of available Wi-Fi networks?

My Ubuntu laptop's Wi-Fi works fine on various Wi-Fi networks. But the list of available networks accessed from the toolbar icon of nm-applet no longer appears. I just see the known networks. The list ...
0 votes
2 answers
50 views

Two NICs on same network - one for internet, one for LAN

I have two NICs in my home server - both are connected to same network. One is 2.5Gbps (which I'd like to use for LAN - eth0), other is 1Gbps (which I'd like to use for internet-only - enp0s25). What ...
2 votes
2 answers
5k views

Network connection is lost after every few minutes

During the startup a wifi connection is established and everything works fine. After a while, the connection disappears suddenly. To fix this i do, sudo service network-manager restart and then my ...
6 votes
1 answer
4k views

Do I need dnsmasq?

When I nmap localhost get this: 53/tcp open domain dnsmasq 2.59 What is it and do I really need it? I tried to remove it with sudo apt-get remove dnsmasq-base but it said if I would continue it will ...
0 votes
0 answers
27 views

OpenVPN (Focal/Jammy) is there any way to import a URL rather than use an ovpn file?

Not being given an .ovpn file, I am instructed to import from a URL. Android and Windows and Mac have this choice. I don't mind the command line, but has anyone managed to do this?
0 votes
1 answer
4k views

No internet after reboot without restarting networking service

I've got a couple of Ubuntu servers (18.04.3). They're connected to the internet and to a private local network. But straight after rebooting a server, they're not connected with the internet. I have ...
1 vote
2 answers
4k views

Sharing Internet Connection (DHCP) through a Wireless Hotspot

I have an internet connection through a cable modem. The IP address on the cable modem is not static and is perhaps obtained through a DHCP mode. I wish to share this internet connection through ...
0 votes
1 answer
4k views

How to connect to an IPSec VPN with a short (<20chars) PSK

I'm trying to connect to a work VPN which is using IPSec and a pre-shared key. The recommended client is NCP Secure Entry (https://www.ncp-e.com/en/products/ipsec-vpn-client-suite/vpn-clients-for-...
0 votes
0 answers
26 views

bus manager fails because service is already taken, why

I am running ubuntu 22.04. after the boot I look at the journalctl using this command:` journalctl -xb | grep "error"` I have 5 lines returned like this: Mar 10 15:51:43 ubuntu ...
2 votes
2 answers
6k views

nm-applet gives errors

nm-applet always gives me a hard time when connecting to wireless. I often have to restart it and make several attempts till it connects to a network. Sometimes even restarting the computer doesn't ...
0 votes
1 answer
37 views

Running nmcli device shows all unmanaged

Screenshot of issue Newbie, recently installed Ubuntu Server OS on Raspberry Pi 4. It shows networks are unmanaged, might also be the reason why ROS on dev machine can't communicate with ROS on ...
1 vote
1 answer
4k views

Ubuntu 22.04 - "Connection Failed: Activation of Network Failed" - VMware

I recently installed an Ubuntu 22.04 distribution on my Virtual Machine (VMware Workstation 16 Player) in order to run Docker. In order to connect the VM to the internet, I'm using an USB WiFi Adapter ...
0 votes
1 answer
10k views

"activation of network connection failed" error for the all my wifi connections

I have installed Ubuntu 22.04 on Windows 10 with dual boot, and I can't get the any of my wifi connections to work. When I run nmcli connection up (wifi-connection-name) it says Error Connection ...
32 votes
3 answers
68k views

Am I running NetworkManager or networkd?

I am learning to use netplan. When writing a YAML configuration file I need to know which renderer to use, either NetworkManager or networkd. How do I know if I am running NetworkManager or networkd?
2 votes
1 answer
5k views

How to troubleshoot network problems for virtual machines connected via a bridge (Ubuntu 18.04)

On my server (Ubuntu 18.04 LTS) I am running a KVM virtual machine which has been running fine for over a year or so but recently - probably because of some update - the virtual machine would lose ...
0 votes
0 answers
22 views

Wifi Connection does not work anymore over the night when Laptop was locked and has a low power

here is the journal of the NetworkManager: Mar 04 12:59:02 david-ThinkPad-E15-Gen-4 NetworkManager[699]: <info> [1709553542.1224] device (wlp2s0): Activation: successful, device activated. Mar ...
-1 votes
1 answer
97 views

Network Manager not working, help

im setting a server with Ubuntu 22.04 and i have been instaling Ubuntu several times. At first, Network Manager worked great and displayed all the networks, but now nmtui doesnt show anything, and ...
1 vote
1 answer
4k views

VPN Connection problem with vpnc

I was able to work through the VPN using network-manager-vpnc without any problem but suddenly it stopped working. This is a snippet caught from my syslog: Sep 2 10:58:19 chachan-ThinkPad-L420 ...
-1 votes
1 answer
107 views

Open/LibreSwan Networkmanager Plugin

When trying to Create an Openswan connection in networkmanager, it cannot connect due to a missing plugin. an apt search shows that openswan is using libreswan but for neither name I can find a ...
2 votes
3 answers
4k views

Ubuntu 16.04 Network-manager and XRDP

I have a test deployment of 16.04 desktop in Hyper-V, as I'm planning a home deployment. I've noticed that when I setup a VPN connection in Network-Manager directly in hyper-v console, I receive no ...
1 vote
2 answers
777 views

Wifi speed slower on Ubuntu 22.04 LTS than on Windows, iOS [Qualcomm Atheros]

Problem: WiFi is much slower on Ubuntu 22.04 LTS than on Windows 10. The connection has download speed around 21-26 Mb/s and similar upload, while on Windows and on iOS the download is 330-360 Mb/s. ...
0 votes
0 answers
23 views

Internet adapter don't work properly with different subnet masks in a multi adapter PC

I'm having some troubles trying to config a triple internet adapter configuration in my 'home made NAS server', aka a old computer like a server, using Ubuntu desktop 22.04.4 with a SAMBA share for my ...
0 votes
2 answers
628 views

Network access (ssh and ping) lost when logged out

My host (5.4.0-97-generic Ubuntu 20.04.3 LTS) responds to ping and allows ssh when my user is logged in, remotely or locally. However, if I restart or log out all user sessions, I lose ssh access and ...
1 vote
0 answers
65 views

NETPLAN "DESTINATION HOST UNREACHABLE" Ubuntu 20.04.6 desktop

I'm quite new to Ubuntu and I'm trying to configure my netplan file. when I set the configuration in my /etc/netplan/01.-network-manager.yaml there seems to be an issue after i have apply the setting (...
0 votes
0 answers
56 views

Issue with dual-NIC clients and netplan swapping ethernet interfaces

Background: 1500+ stations running Ubuntu Server + ubuntu-desktop-minimal, most are still on 20.04, new stations are all deployed with 22.04 (with a ubuntu-desktop-minimal --no-install-recommends flag ...
17 votes
9 answers
35k views

22.04, wifi keeps disconnecting for a few seconds frequently

My wifi connection keeps disconnecting frequently (say once in a couple of minutes) sometimes it gets back and sometimes I need to activate and deactivate aeroplane mode. I tried to change my network ...
0 votes
0 answers
84 views

Ubuntu 22.04 wifi connection is lost every x minutes

A week or two ago my wifi started losing the connection every 10-20 minutes. As far as I am aware I did not do any updates or anything prior to this. I have tried all sorts of solutions found online, ...
192 votes
12 answers
499k views

network manager says "device not managed"

I used to be able to share my network connection by editing the Auto Eth0 to share with other computers in the Ipv4 section and now I upgraded my laptop to 11.10 . Now are there no wired connections ...
6 votes
2 answers
17k views

Network Manager script when interface up?

Because I am using Bionic Beaver/Ubuntu 18.04, the network settings in /etc/network/interfaces are being ignored and the settings in /etc/NetworkManager/system-connections/'eth0' are being used for i) ...
0 votes
0 answers
28 views

No 5Ghz detected and wifi connection "expires" but keeping a terminal pinging an address keeps the connection alive

My problem is two-fold, and I think they might be related: On the "select network" tab, I only see 2.4Ghz networks, however my router has the typical 2.4 and 5ghz variant. I much prefer the ...
0 votes
1 answer
5k views

Correct way to apply WiFi mac address randomization

I wanted to randomize my mac address on every boot just like in Windows 10. During my quest for that I tried the following - According to this post, starting from NetworkManager 1.4.1+ we can do mac ...
4 votes
1 answer
4k views

Network connection: Make available to other users

which configuration file controls the option "Make available to other users" in the Network settings? For users, who are in the netdev group, this option is checked by default. I would like to change ...
0 votes
1 answer
45 views

Dualboot Windows 11 and Linux Ubuntu 22.04.3 LTS WIFI connection via Linux does not work

i have started my Laptop yesterday and it cannot connect to my Internet (via Wifi). It works with my Handy Hot Spot and with an Ethernet Connection (with the Internet that i have). I also tried ...

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