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Download Network Manager For Ubuntu 20.04
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Annemie Zierenberg
Jan 4, 2024, 2:34:11 AM1/4/24
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NetworkManager is a system network service that manages your network devices and connections and attempts to keep network connectivity active when available. It manages Ethernet, WiFi, mobile broadband (WWAN) and PPPoE devices while also providing VPN integration with a variety of different VPN services.
The system is freshly installed (an offline install, with no ethernet cable attached) and at the first boot I plugged the cable into the ethernet port, I simply issued a dhclient; apt-get update; apt-get install network-manager, then I filled a file (/etc/NetworkManager/system-connections/EthernetInterface) with this data:
download network manager for ubuntu 20.04
Download https://t.co/35lWaWHEop
However I need the NetworkManager features (DBUS interface, automatic fallback on other connections when using mobile interfaces, integration with ModemManager). That's why I installed network-manager. However it is not working: maybe I have to change some default configuration, maybe I have to enable it, or maybe there is some rule somewhere to make it the default network connections handler. Do you know where? Otherwise I'll have to get a desktop version, but I preferred the server version since I didn't need a GUI
DO NOT write managed=true in the configuration file, though. This way if you write an interface in /etc/network/interfaces you will have it managed by ifupdown instead of NetworkManager (default behavior for nm).
I did not realize the OP could not connect to the internet. You don't need a network manager to connect to the internet. Don't waste your time looking for a different computer and transferring the files. If you have an Ethernet cable connect the computer directly to the modem and then:
Happened to face same problem. That's how i solved it. I happened to remove the network-manager and yep now I have no internet. So I came to know after that best shot is So but which package I asked myself.
Its obvious it fails, but I came to know what package it was trying to download.e.g in my case if failed while downloading -manager-applet/network-manager-gnome_0.9.8.8-0ubuntu4.3_amd6. So that's it, go to your friend system. Hit this url .It will download deb package.
I would like to disable network manager service for particular interface(s). "/etc/init.d/NetworkManager stop" is not going to serve my purpose since will stop the service. Please let me know how to achieve this. Please suggest commands/code only - I am not interested in graphical configuration. If there is some rpm/patch available already please refer it to me. Can we configure network manager in such a way so that it will not detect any new network card plugged into the system?
The 2nd part of your question, "Can we configure network manager in such a way so that it will not detect any new network card plugged into the system?", I think is handled in the /etc/NetworkManager/NetworkManager.conf file with the line:
Other than that suggestion thats the area of code that needs to be debugged to understand what is specific to your network that is not being understood and therefore defaulting to a failed wifi state.
Twice in a year the installed network-manager stopped to work in my Ubuntu 22.04.1 LTS leaving me without internet connection. I wonder if there is a way to prevent this to happen. My question is: Can I reinstall network-manager from the Ubuntu ISO file that I kept since the installation?, If that is possible, what will be the Terminal procedure without internet connection available to do it? Once I get the internet access again I will be able to update it.
More details: I tried almost all procedures recommended to regain access to the internet... almost all of them, required an active connection, or a "friend" computer connected, what I am using now. The procedures that I could follow without internet did not work for me.
The symptoms: Network manager in the settings menu is showing only manual setting HTTP proxy 8080, nothing else; in Terminal, $ nmtui shows my connections en edit mode, but not to connect; the same happens in $ nmcli con show.
On the initial Ubuntu 22.04 ISO there was version 1.36.4-2ubuntu1, but due to some bugs, theny meanwhile have been superseded by version 1.36.6-0ubuntu2. If you want to use the installer ISO file to reinstall the network-manager packages, then this is not trivial, because the ISO file most probably does not contain the same version as the one currently installed on your system.
To Manfred: Thank you very much for your clear explanation. In fact, that answers my question and I know now that even it is possible to reinstall the network-manager from the original ISO after lots of work, it really doesn't worth because it will not match the actual status of my system. OK, I will forget about it and look for another solution.
I think the way to go now will be uninstalling whatever network-manager (or its remains) is still in my system and installing another from a package, Easy to say, but which, and how. Keeping the package in a safe place will be a quick restore help if anything happens again.
How many network devices are listed?
Can you identify one of them as the WLAN device?
What is shown for its type and manufacturer?
Is there somewhere the string "driver=", and what is shown there?
Is there an IP address shown in the output?
Although I understand that using the Ubuntu ISO to solve a network problem is worthless, I am still unable to access the Internet, so I continue to look for solutions. Maybe I have to ask another question, like:
Is it possible to make a package that gives at least a minimun access, like through Ethernet cable, just to be able to get the resources needed to solve this kind of problem. I say this, because I tried to install the network manager package saving it into /var/cache/apt/archives/ but the apt try to go anyway to the internet to look for the package. When I succesfully made the apt to fetch the downloaded package, it still tried to acces the internet looking for the dependecies. Obviously it ends with errors all the time.
For your attempt to copy the network manager deb file to /var/cache/apt/archives/:
The command that I gave earlier (sudo apt install --reinstall --no-download libnm0 network-manager) is supposed not to look at the internet for updates. Which command did you try?
Still I doubt that the problem can be solved by reinstalling the software. I much more believe that there is something wrong in your configuration.
There are several reports on the web where people complain that networking failed because of certain vpn solutions that they installed. From your output I assume that you have ProtonVPN installed. Have you tried disabling it?
The concerning news is that I copy/paste your
cd /var/cache/apt/archives/
sudo dpkg -i libnm0_1.36.6-0ubuntu2_amd64.deb network-manager_1.36.6-0ubuntu2_amd64.deb
to Text Editor (and now into this comment) with no problem. BUT when I try to do the same thing in LibreOffice Writer the paste gave me
cd /var/cache/
sudo dpkg -i libnm0_
And cannot even complete it writing myself! I can do copy/paste with any other text, but not with that couple of lines.
Does it mean that LibreOffice is contaminated?
The "standard" way of diagnostics for WLAN problems is connecting the system to the internet (with whatever means) and running
If you now have network connection, then please execute the command in step 2 and paste all output into this question document. That information should come in handy in case of another failure in future.
Update on symptoms:
FreeOffice Word definitively not working as should, several tests shows that is taking symbols as commands (/,-).
Bluetooth: I found it on, but I don't use it. Turned it off but It turns on by it self,
Router: Suddenly one of the WiFi stop working, This is same symptom I had before the previous problem with network.
Shut down: After clicking the menu command, it says that there is a process still running(?) and asked me the pass to be sure to turn off the laptop. (how can I check which process is running?)
Turn on: several error messages (how to read them?)
Update on actions taken:
I blocked the internet in and out in the firewall.
I am not using LibreOffice until feeling secure of doing it.
I am not using Krita until is ok.
Router: I reset it and return to work.
I am using the laptop with WiFi off, using "friend" computer when necessary and possible. This is not to worsen the situation until finding a solution. Anyway I think I will still be able to restore the situation with Time Shifter as I did, if necessary.
I'd rather modify the config files for UNM than work with Eddie, if possible, so in the first instance I'd appreciate some help with ubuntu-network-manager configuration, and failing that some help with the client program.
As you can see there is no subnet configuration for the tunnel. We let the serveradministration choose the subnet(s); the client always proposes 0.0.0.0/0 forthe remote network and the server narrows that down to the configured subnet(s).
Still I am not able to to a wifi connect via network manager (without typing sudo password). I am setting up a headless wap connect to I need to get netdev group to have permission to connect to wifi wap.
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at You might also ask for help in the #ubuntu-bugs irc channel on Freenode.
Upstream in the GNOME Projects network-manager-libreswan GIT repository in the NEWS file, you'll notice network-manager-libreswan was renamed from network-manager-openswan at version 1.2
-manager-libreswan/tree/
35fe9a5643
The system is freshly installed (an offline install, with no ethernet cable attached) and at the first boot I plugged the cable into the ethernet port, I simply issued a dhclient; apt-get update; apt-get install network-manager, then I filled a file (/etc/NetworkManager/system-connections/EthernetInterface) with this data:
download network manager for ubuntu 20.04
Download https://t.co/35lWaWHEop
However I need the NetworkManager features (DBUS interface, automatic fallback on other connections when using mobile interfaces, integration with ModemManager). That's why I installed network-manager. However it is not working: maybe I have to change some default configuration, maybe I have to enable it, or maybe there is some rule somewhere to make it the default network connections handler. Do you know where? Otherwise I'll have to get a desktop version, but I preferred the server version since I didn't need a GUI
DO NOT write managed=true in the configuration file, though. This way if you write an interface in /etc/network/interfaces you will have it managed by ifupdown instead of NetworkManager (default behavior for nm).
I did not realize the OP could not connect to the internet. You don't need a network manager to connect to the internet. Don't waste your time looking for a different computer and transferring the files. If you have an Ethernet cable connect the computer directly to the modem and then:
Happened to face same problem. That's how i solved it. I happened to remove the network-manager and yep now I have no internet. So I came to know after that best shot is So but which package I asked myself.
Its obvious it fails, but I came to know what package it was trying to download.e.g in my case if failed while downloading -manager-applet/network-manager-gnome_0.9.8.8-0ubuntu4.3_amd6. So that's it, go to your friend system. Hit this url .It will download deb package.
I would like to disable network manager service for particular interface(s). "/etc/init.d/NetworkManager stop" is not going to serve my purpose since will stop the service. Please let me know how to achieve this. Please suggest commands/code only - I am not interested in graphical configuration. If there is some rpm/patch available already please refer it to me. Can we configure network manager in such a way so that it will not detect any new network card plugged into the system?
The 2nd part of your question, "Can we configure network manager in such a way so that it will not detect any new network card plugged into the system?", I think is handled in the /etc/NetworkManager/NetworkManager.conf file with the line:
Other than that suggestion thats the area of code that needs to be debugged to understand what is specific to your network that is not being understood and therefore defaulting to a failed wifi state.
Twice in a year the installed network-manager stopped to work in my Ubuntu 22.04.1 LTS leaving me without internet connection. I wonder if there is a way to prevent this to happen. My question is: Can I reinstall network-manager from the Ubuntu ISO file that I kept since the installation?, If that is possible, what will be the Terminal procedure without internet connection available to do it? Once I get the internet access again I will be able to update it.
More details: I tried almost all procedures recommended to regain access to the internet... almost all of them, required an active connection, or a "friend" computer connected, what I am using now. The procedures that I could follow without internet did not work for me.
The symptoms: Network manager in the settings menu is showing only manual setting HTTP proxy 8080, nothing else; in Terminal, $ nmtui shows my connections en edit mode, but not to connect; the same happens in $ nmcli con show.
On the initial Ubuntu 22.04 ISO there was version 1.36.4-2ubuntu1, but due to some bugs, theny meanwhile have been superseded by version 1.36.6-0ubuntu2. If you want to use the installer ISO file to reinstall the network-manager packages, then this is not trivial, because the ISO file most probably does not contain the same version as the one currently installed on your system.
To Manfred: Thank you very much for your clear explanation. In fact, that answers my question and I know now that even it is possible to reinstall the network-manager from the original ISO after lots of work, it really doesn't worth because it will not match the actual status of my system. OK, I will forget about it and look for another solution.
I think the way to go now will be uninstalling whatever network-manager (or its remains) is still in my system and installing another from a package, Easy to say, but which, and how. Keeping the package in a safe place will be a quick restore help if anything happens again.
How many network devices are listed?
Can you identify one of them as the WLAN device?
What is shown for its type and manufacturer?
Is there somewhere the string "driver=", and what is shown there?
Is there an IP address shown in the output?
Although I understand that using the Ubuntu ISO to solve a network problem is worthless, I am still unable to access the Internet, so I continue to look for solutions. Maybe I have to ask another question, like:
Is it possible to make a package that gives at least a minimun access, like through Ethernet cable, just to be able to get the resources needed to solve this kind of problem. I say this, because I tried to install the network manager package saving it into /var/cache/apt/archives/ but the apt try to go anyway to the internet to look for the package. When I succesfully made the apt to fetch the downloaded package, it still tried to acces the internet looking for the dependecies. Obviously it ends with errors all the time.
For your attempt to copy the network manager deb file to /var/cache/apt/archives/:
The command that I gave earlier (sudo apt install --reinstall --no-download libnm0 network-manager) is supposed not to look at the internet for updates. Which command did you try?
Still I doubt that the problem can be solved by reinstalling the software. I much more believe that there is something wrong in your configuration.
There are several reports on the web where people complain that networking failed because of certain vpn solutions that they installed. From your output I assume that you have ProtonVPN installed. Have you tried disabling it?
The concerning news is that I copy/paste your
cd /var/cache/apt/archives/
sudo dpkg -i libnm0_1.36.6-0ubuntu2_amd64.deb network-manager_1.36.6-0ubuntu2_amd64.deb
to Text Editor (and now into this comment) with no problem. BUT when I try to do the same thing in LibreOffice Writer the paste gave me
cd /var/cache/
sudo dpkg -i libnm0_
And cannot even complete it writing myself! I can do copy/paste with any other text, but not with that couple of lines.
Does it mean that LibreOffice is contaminated?
The "standard" way of diagnostics for WLAN problems is connecting the system to the internet (with whatever means) and running
If you now have network connection, then please execute the command in step 2 and paste all output into this question document. That information should come in handy in case of another failure in future.
Update on symptoms:
FreeOffice Word definitively not working as should, several tests shows that is taking symbols as commands (/,-).
Bluetooth: I found it on, but I don't use it. Turned it off but It turns on by it self,
Router: Suddenly one of the WiFi stop working, This is same symptom I had before the previous problem with network.
Shut down: After clicking the menu command, it says that there is a process still running(?) and asked me the pass to be sure to turn off the laptop. (how can I check which process is running?)
Turn on: several error messages (how to read them?)
Update on actions taken:
I blocked the internet in and out in the firewall.
I am not using LibreOffice until feeling secure of doing it.
I am not using Krita until is ok.
Router: I reset it and return to work.
I am using the laptop with WiFi off, using "friend" computer when necessary and possible. This is not to worsen the situation until finding a solution. Anyway I think I will still be able to restore the situation with Time Shifter as I did, if necessary.
I'd rather modify the config files for UNM than work with Eddie, if possible, so in the first instance I'd appreciate some help with ubuntu-network-manager configuration, and failing that some help with the client program.
As you can see there is no subnet configuration for the tunnel. We let the serveradministration choose the subnet(s); the client always proposes 0.0.0.0/0 forthe remote network and the server narrows that down to the configured subnet(s).
Still I am not able to to a wifi connect via network manager (without typing sudo password). I am setting up a headless wap connect to I need to get netdev group to have permission to connect to wifi wap.
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at You might also ask for help in the #ubuntu-bugs irc channel on Freenode.
Upstream in the GNOME Projects network-manager-libreswan GIT repository in the NEWS file, you'll notice network-manager-libreswan was renamed from network-manager-openswan at version 1.2
-manager-libreswan/tree/
35fe9a5643
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