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Questions tagged [networking]

Managing and using network connectivity on a Ubuntu system

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Ubuntu 18.04 ethernet not configuring automatically

I have a laptop with Ubuntu 18.04 Desktop installed. The system is eager to configure and operate WiFi, but I need a wired connection because my adapter is slow compared to the 1000BASE-T Ethernet. ...
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1answer
15 views

Problem with Network Manager not selecting Ethernet connection

Gentlemen: After I upgraded to Ubuntu 18.04.1 LTS, I experienced no problems at all. Unfortunately, an update on 10/6/2018 caused an error in my NetworkManager.conf (location etc/Networkmanager) ...
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1answer
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Preventing interface from becoming default route

I'm kind of a linux noob and have been messing with this a night and a day now, so I thought I'd ask here. I have a FreeNAS and a Ubuntu 18.04 VM running under a ESXi host. The FreeNAS VM has a HBA ...
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8 views

No response from remote desktop when connecting via ssh

I'm trying to connect to a Jetson TX2 running Ubuntu 16.04. I'm using ifconfig on my Jetson to figure out the ip adress on to which I want to connect to. then, using this adress, I do: ssh nvidia@...
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Realtek Wireless Drivers unclaimed after installing 18.04

My context: Long-term 16.04 user but still a noob (just appreciate the relatively minimal OS). New laptop, installed 18.04, completely replacing Windows 10. Been unfruitfully trying to solve this for ...
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8 views

vmware-netcfg fails with a boost json_parser exception on Ubuntu 18.04

I'd like to do a little advanced networking but i cant seem to get it to work. k@SERVER:~$ sudo vmware-netcfg [sudo] password for k: [AppLoader] Use shipped Linux kernel AIO access library. An up-to-...
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1answer
18 views

How to display/extend/mirror/cast Ubuntu 16.04 screen to a Samsung Smart TV that is connected to the same network?

How can I share/display what I am seeing on my Ubuntu system to a networked Samsung Smart TV? The Ubuntu system and Samsung Smart TV are LAN connected to the same network. The Ubuntu system is a ...
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kubuntu 18.04 eduroam(no CA) wifi problem on XPS13

Recently updated to 18.04 and swiched to a different eduroam network which doesnt require a CA certificate on setup. Since then I dont get a working internet connection. It shows that it connects to ...
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127.0.1.1 entry gets created in /etc/hosts on reboot in Ubuntu 16.04

I have custom /etc/hosts entries for my cluster nodes, but on reboot the 127.0.1.1 entry gets added to the /etc/hosts file. Because of this the cluster fails to start as it tries to reach to this IP ...
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New wired connection profile just appeared

System : Ubuntu 18.04.1 I usually connect through the 'Wired connection 2' which was my only connection profile on the network manager. Today, when I logged in my computer, a new profile was there '...
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How can I set a static IP for juju machines?

I found a similar question from 2014, How to give a Juju charm a static ip address - wordpress, but the answer only says it's not possible, but will be in 15.04, which doesn't help much. Currently ...
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Unable to connect to obfs4 bridge in Tor

I've got Tor installed as per the instructions from this question. In addition, I'm using bridges which I have added with the appropriate configurations into /etc/tor/torrc. However, if I try to use ...
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9 views

TP-Link Wifi slow - Driver has suspect GRO implementation, TCP performance may be compromised

I have a TP-Link TL-WN881ND N300 PCI-E Wireless in my PC with Bionic LTS server. I noticed in the syslog: Oct 14 00:37:54 localhost kernel: [ 6326.989561] TCP: wlp30s0: Driver has suspect GRO ...
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Problems connecting wireless device

I'm using Ubuntu 18.04 Server, and I bought a usb wireless Tp-link TL-WN821N. The output of dmesg | grep usbcore is this: [ 0.098543] usbcore: registered new interface driver usbfs [ 0.098543] ...
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How to connect GNS3 to local host and real network?

I use these commands sudo tunctl -u username -t tap0 sudo ifconfig tap0 0.0.0.0 promisc up sudo ifconfig enp0s25 0.0.0.0 promisc up sudo brctl addbr br0 sudo brctl addif br0 tap0 sudo brctl addif ...
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configuring network files in windows 10 linux bash shell

just wondering what are the right files to configure the network in windows 10 bash shell, internet works anyway, here is the last error I got from net manager error: cannot communicate with server: ...
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Wi-Fi strength issue after upgrading to Ubuntu 18.04 LTS with RTL8723BE

I have upgraded Ubuntu from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS. In Ubuntu 16.04 LTS, Wi-Fi was working perfectly fine. But in Ubuntu 18.04, the Wi-Fi strength got weakened and also sometimes it's ...
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Network doesn't come back up after connection loss

I've successfully gotten my setup working with a 2Gbps connection to the rest of my network through a Unifi switch via bond0 (enp6s0 & enp7s0 in LACP) using netplan. The problem I'm running into ...
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ADSL slow connection problem with Ubuntu 16.04

I had initially installed Ubuntu 18.04, but couldn't connect through ADSL (Wifi is OK), after awhile, replaced with Ubuntu 16.04, this time I could create an ADSL connection and connect to internet, ...
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2answers
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Toggleable system-wide Tor?

I've set up Tor on my system with torsocks by adding 127.0.0.1:9050 to Ubuntu's network proxy settings (set to manual). I can confirm this works as intended by comparing IP addresses and using https://...
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How can I have internet access through ssh

I have a HP Pavillion 15 with Ubuntu 18.04, openssh-server installed and running and I also have an Aspire S3 with Ubuntu 18.04 openssh-client installed. I can access the HP through ssh on my Acer ...
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2answers
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PCI WiFi module for Ubuntu 18.04 and Windows 10?

I search PCI WiFi module for Ubuntu 18.04 and Windows 10. I found modules which support Windows 10 but not support Ubuntu, or support Ubuntu but Windows 7(and less). This module https://www.asus.com/...
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How do I find the process generating a flood of packets?

TL;DR: Wireshark shows that about 100 GVSP packets are being sent per second from the affected computer. Nethogs, netstat -ptu don't reveal which process is causing this. What tool can I use to find ...
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1answer
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After running for few days if mysql gives following error

After running perfectly for few days, If the mysql server gives following error. mysql -uroot -p -h localhost Enter password: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '...
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2answers
229 views

How to add an address to DNS

My system is Ubuntu 18.04 (Bionic Beaver). And I want to add 172.26.5.14 to system DNS addresses. I searched and found some solutions like: Add to /etc/resolv.conf. But data removed neither ...
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How to make hostapd AP visible (accessible) after suspend or hibernation

hostapd AP still enabled but disappears, become inaccessible after suspend or hibernation on 14.04. I'm using TLP and wifi settings is: RESTORE_DEVICE_STATE_ON_STARTUP=1 How to make AP auto visible ...
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6 views

VMware adapter connection

I have router which have "adapter1" for NAT, "adapter2"for intnet1, and "adapter3" for intnet2. I made connection with router, web, and desktop by giving enp0s8 for "adaptor 2" (I changed those at the ...
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How to only use terminal to connect to a wifi hotspot which requires webpage login?

I have a server machine running at home. It has two network interfaces: cable LAN, and a WLAN. I ssh into this machine using its cabel LAN interface, because it is stable and robust. I need to use ...
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1answer
25 views

Ubuntu 18.04 LTS: Slow down on localhost after recent update

I have been developing a network enabled application and been testing it on 127.0.0.1 (localhost). The application is completely memory bound, i.e. it never touches the hard disk. The procedure of ...
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0answers
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Choose execution script, tor or vpn [on hold]

I've created a python script to do some scraping. To avoid being recognized as a bot I do it by tor and periodically change my public IP address. I noticed, however, that my public ip always come from ...
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WiFi is not working properly on Ubuntu 18.04 LTS in my HP Pavilion Notebook

sourav242@sourav242-ubuntu:~$ echo "options rtl8723be ant_sel=1" | sudo tee /etc/modprobe.d/rtl8723be-ant-sel.conf options rtl8723be ant_sel=1 sourav242@sourav242-ubuntu:~$ iwlist scan | egrep -i '...
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1answer
28 views

sudo apt update fail

when I run $sudo apt update. It always shows me the "connection timed out" error.At the same time, I can surf on Internet but the mark of net connection condition always gives a "?". How can I fix ...
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1answer
28 views

netplan apply does not change the IP address

ok, my file is located at /etc/netplan/50-cloud-init.yaml I changed the IP address as a static IP address as following: network: version: 2 renderer: netwokrd ethernets: dhcp4: no ...
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1answer
30 views

How do I find my network prefix?

I am reading Python Networking book: When a network device generates network traffic that needs to be sent across a network, it first compares the destination's IP address with its own network prefix....
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Add a /64 range of IP addresses

I have a VPS that the provider allocated me a /64 block of IPv6 addresses, I'm trying to give each domain I'm hosting in it a unique IPv6 address. I'm using the configuration options in /etc/network/...
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12 views

Alfa AWUS036NHA not detected by Virtual Box

I bought the Alfa AWUS036NHA network adapter and I connected it to my computer in which I'm dual booting Ubuntu and windows. I connected it to Ubuntu which is where I have my Kali Linux VM installed. ...
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2answers
88 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 ...
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17 views

Slow connection with multiple IP alias on Ubuntu 18.04

On my home server, when I configure multiple IP alias on Ubuntu 18.04 using netplan my SSH connection becomes really slow. Here's my customized /etc/netplan/50-cloud-init.yml: network: ethernets: ...
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How can I permanently disable HP Mobile Connect Pro / HT lt 4120 Snapdragon x5 lte?

I have an HP EliteBook which contains a mobile chip. In theory it would be nice. In practice, I never figured out how to get it working and I don't need it. However, I have the impression that it ...
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1answer
55 views

Can mount SMB share using nautilus but not using smbclient

I can mount my SMB share using nautilus by simply adding the location smb://ip Here's what happens when I use smbclient on another computer: lz@air:/media$ smbclient -L //192.168.0.3 WARNING: The "...
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Multiple Subdomains with different ssh host keys (docker containers)

I am trying to get rid of these annoying message Warning: the ECDSA host key for 'mysub.domain.de' differs from the key for the IP address 'XXX.XXX.XXX.XX' Offending key for IP in /home/thisuser/.ssh/...
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1answer
52 views

Ubuntu 18.04.1 Intel 9260, beginner question

I recently switched to Ubuntu, at least with a dual-boot on my laptop to learn the environment and test it before switching. As a developer, I think as an operating system, it will work better for me. ...
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9 views

How to create multiple Samba instances on single server

Good day. Having trouble creating multiple samba shares on different ports. I have 2 virtual interfaces (say: eth0:0(10.10.0.1) and eth0:1(10.10.10.1)). I need a separate Samba instance running on ...
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Have Network Manager 1.10.6 reuse existing USB network connection (new network connections get created for renamed ones)?

I have a Bela.io (BeagleBone) device, which when attached to the PC (here Ubuntu 18.04 laptop) via USB, appears in Ubuntu as a Wired network connection (it also adds a removable drive, but that's ...
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1answer
24 views

Ubuntu 16.04.5 USB wifi Adapter: 0bda:b812 not working

Just build my own computer and installed ubuntu 16.04. But I can't seem to get my wifi usb adapter working. It's an iptimeA3000UA. Although the packaging said it only works for windows, I thought it ...
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1answer
66 views

Networking frustrations - 2 weeks of research with no answers

I have three computers on my network. 1 Windows 10 machine, 1 Mac OS machine and 1 Ubuntu machine. Windows machine: can see Mac, access Mac, read and write to Mac. Can see Ubuntu machine but trying ...
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1answer
90 views

fixed IP address on LAN under Ubuntu 18.04 (netplan)

I've just installed Ubuntu for the first time and I want to set up a fixed IP address for my computer as a first step towards connecting from outside via ssh. I can find no menu in my router to ...
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0answers
24 views

ubuntu 18.04 local network issue

With my new ubuntu 18.04 installation the machine is using my local WiFi LAN, and in most cases it is working fine. I can use a browser to the outside world, as well as email, and other internet ...
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1answer
23 views

Ubuntu18.04 smb using SMB3 force user does not work (all files owned by root instead of forced user) works with vers=1.0

I have just upgraded from ubuntu16.04 to 18.04.1 Previously I had some CIFS/SMB shares auto-mounted using autofs and one of the shares is configured on the smb server to force the user and group to "...
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1answer
15 views

Headless Remote Control for Ubuntu

I am looking for recommendations for remote controlling Ubuntu boxes in headless mode. I have several single board computers and desktops running Ubuntu in headless mode behind a firewall. I would ...