Managing and using network connectivity on a Ubuntu system

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ethernet interface dropping connection intermittently Ubuntu 16.04

I'm seeing an issue where my Realtek ethernet NIC will occasionally drop pings to the gateway. I have isolated the issue to my PC by using other PCs to test the link without issue. The connection is ...
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Ubuntu 16.04 wireless connection

I am trying to set up wireless with my newly installed Ubuntu 16.04 on my laptop. ifconfig -a ens5 Link encap:Ethernet HWaddr 00:25:b3:42:05:5c inet addr:10.2.102.195 Bcast:10.2....
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Program runs at Ubuntu 14.04 but doesn't run at Ubuntu 16.04

I have program, that injects ip-address to the packets. Program have next includes: #include <stdio.h> #include <stdint.h> #include <dlfcn.h> /* header required for dlsym() */ #...
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Error on sudo modprobe w1

With reference to here I tried to resolve the technical problems of my Wifi and drivers, I ran the command sudo modprobe w1, but it gave an an error: modprobe:FATAL: Module w1 not found in directory ...
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iptables rule traverse order

Here is partial output of my iptables: **Chain OUTPUT** (policy ACCEPT) num target prot opt source destination 1 ufw-before-logging-output all -- 0.0.0.0/0 ...
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Having to reinstall ethernet drivers after booting into Windows. (Dual-boot W10/15.04)

I have had this problem intermittently but was just recently able to replicate it. After using Ubuntu 15.04 for any amount of time, even just booting into it then immediately restarting before logging ...
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What is my DNS mis-configuration in docker?

I recently installed docker on my ubuntu 16.04. I pulled and run hello-world, ubuntu and sinatra images sucessfully, but they cannot connect to the internet I think!! Example the following errors ...
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No wireless or wired internet after installing ubuntu desktop 12.04

After installing ubuntu 12.04, I can not connect to the internet wirelessly or wired. my pc is a recent machine may be this is a problem of incompabity, the result of ifconfig -a is in this image. ...
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Network Interfaces name Ubuntu 16.04

I try to change my Network Interface Name to the old style eth0, eth1 like with this question: via this line in grub config it seems to work. GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0" I ...
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bluetooth problem 14.04 (switch on/off)

I have a similar problem as this question but nothing helps, this is what I've tried in the Terminal: tetrev@tetrev-X55C:~$ lspci 00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM ...
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Send a SIP Invite to lrnlookup.telnyx.com with sipsak?

How can I use sipsak to send a SIP Invite to lrnlookup.telnyx.com? The telnyx Data API tab describes a SIP request: Requires IP Authentication to be setup through the portal and associated with ...
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How to redirect ssh logins to server's Docker containers

I'm planning a server for the students studying Linux and have some rules for this. All students will get the same server domain/port for SSH, and each own username/password(normal privilege). 4 ...
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Wifi Keeps Disconnecting on 16.04

So i updated my computer and since it keeps disconnecting my wifi card with xubuntu running on 16.04. Any help? LSPCI on terminal returns: 00:00.0 Host bridge: Intel Corporation Sky Lake Host ...
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Ubuntu Server 14 connects on LAN but not WAN

Every time I boot my newly installed Ubuntu 14.0.4, it always says "Waiting for network configuration". When I log in, I have to type sudo ifconfig enp3s8 up to activate my adapter (for some reason it ...
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DHCP request timing out, suddenly

On a work computer. No problems with connectivity until now. I was working diligently, when suddenly my computer seized up. I thought it was a graphics issue and rebooted. When I couldn't log in (but ...
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Unique problem with wifi being 5-10 times worse than it should be

I have been using my laptop with Mint for over a year now and have had no issues. I wanted a change of pace and decided to put Ubuntu 16.04 LTS on it. There were no issues with installation. My ...
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Setup Apache2 on Ubuntu 16.04

First of all, I'm a newbie to Ubuntu.I want to setup my own web server.I already installed LAMP using this command: sudo apt-get install lamp-server^ So what I expect now is when people from ...
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ThinkPad T450s Wireless interface not detected when installing Ubuntu 16.04 mini.iso

I'm trying to install Ubuntu Mate minimal installation using the Ubuntu 16.04 mini.iso on my ThinkPad T450s. I was able to do so on my T60, but I'm running into network config issues on this machine. ...
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WiFi can not connect when laptop is a bit far from router ubuntu 14.04 LTS

so i installed Ubuntu 14.04 LTS a while ago,every thing seems to be working perfectly except for the wifi,when i login to windows 10 the wifi connects instantly but when i log in to Ubuntu the wifi ...
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NetworkManager can't connect to 5G

So I was trying to optimize my own connection, when I restarted the networkmanager service. Then I suddenly couldn't connect to a specific 5G connection which is quite annoying. When I try to do it, ...
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Internet Is Connected But Not Working On Lenovo g580

Today I Will Install BackBox 4.6 from https://backbox.org/ When I Connect LAN (Ethernet) Cable In My Laptop Still It Is Connected. But I Can't Able To Access The Internet. I Try " ping " Command ...
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Ssh to target host via gateway

Have a HostA that located in internal subnet which could be seen only from gatway host. Then I issue command like: %ssh -t -o ProxyCommand='ssh GateWayUser@GatWayHost nc HostA 22' HostAUser@HostA ls -...
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Predict network interface names before upgrading to 16.04

When I upgraded one of my servers I had to adjust network configuration (I use interfaces file) and use the new network interface name. I was lucky that the server runs in a VM and I could access it ...
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30 views

Setup a static IP allocated to dedicated server

So, I bought a new IP for my dedicated server from a reseller of Psychz Networks. This is the only information they gave me: IP: 104.206.231.109 Gateway: 104.206.231.1 Netmask: 255.255.255.128 So, ...
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VPN connection issue

I am having trouble with VPN connection can not connect to the workplace, receiving error message VPN connection failed this is what i see in terminal:
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Forwarding VPN clients to internet

I have following configuration. OpenVPN server on a cloud(Ubuntu 14.04) with static IP( example 50.60.70.80 on eth0). Linux and Windows clients are successfully connected to VPN (VPN static IP's - ...
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Wireless connection is not showing in Ubuntu 16.04 [duplicate]

Hello I am a newbie to linux.I thought to give a start a with Ubuntu so yesterday I switched to ubuntu but after installing wireless connection doesn't show up but wired connection is working fine. I ...
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Wired Ethernet on Mac Mini with ubuntu 16.04

I installed 16.04 as a double boot on my 2011 Mac Mini and all seemed to work - until I tried to connect to my network (wired and wireless). I get the message that the connection is established after ...
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Losing connection to network about once a day. Can't figure out why. [Ubuntu 16.04]

If someone could help me troubleshoot this, I'd appreciate it! The latest in a long series of disconnections came about 15 minutes ago @ 03:00. I've set up a little bash script on my laptop that ...
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How to keep VPN connection alive after ssh disconnects

I'm trying to download a large file on my vps which needs to be done using vpn. I use screen to keep wget process running after I close ssh connection to server, but the vpn connection will be lost as ...
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vmware nat network setting

The below image is what I am thinking about vmware's nat network. The blue line is bridged network, and red circle is NATed network where VMs live. The NAT gateway is 172.16.108.2 The green line is ...
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Wireless LAN Hard blocked: yes

It has been more than a year my old friend Toshiba Satellite A500 cannot connect to WiFi. Long before WiFi was working both on dual boot, Ubuntu 15.04 and Windows 7 but something happened one day and ...
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Unstable internet connection

I have the Intel 7260 (rev 73) and I am running xubuntu 16.04 Sometimes my wifi stops working out of nowhere ("Device not ready" it says in the xfce wifi applet). I need to reboot my laptop to ...
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motherboard pcie slot help [on hold]

How can ubuntu tell me what pcie slot I have on my motherboard?
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1answer
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SSH: Set timeout for broken pipe

ssh has the paramater -o ConnectTimeout=10 to set the timeout in seconds when establishing the connection, but once the connection has been established, the parameter has no more effect. When an ...
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1answer
35 views

Local network works but not the internet

I am at work and the Internet works fine on my laptop but then it suddenly stopped working and still does not work. I can get Local Net. No idea why this issue has happened. I do recall an update that ...
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1answer
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WiFi for HP 17-y020ca under Ubuntu 16.04 always either disabled or “not ready”

I recently purchased an HP Notebook 17-y020ca and installed XUbuntu 16.04. This notebook has a Broadcom Corporation BCM43142 wireless card. This wireless card was not originally detected (but the ...
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Upgraded from Ubuntu 15.10 to 16.04 and networking not working

I just upgraded from 15.10 to 16.04 on a HP Stream Notebook with very little configuration changes from the default installation. Wifi was working before and Ethernet was working before the upgrade (...
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25 views

Wireless Driver (QCA6174) Not Working after Update [on hold]

I sheepishly clicked the "Ubuntu Has Updates" box, and upon restarting my computer, wireless doesn't seem to be working anymore. I have a Killer Wireless 1535 Card that was running just fine on ...
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Network is unreachable after KernelBuild in Parallels Desktop Ubuntu

I'm a linux newbie and sorry for my bad English and lack of Linux background knowledge. Recently I've been working on Linux KernelBuild on my Parallels Desktop Ubuntu environment (Ubuntu 15.10) ...
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No wifi after restart in Ubuntu 16.04

After upgrading to 16.04, there is no wifi whenever I restart the system. My Wireless interface of Ubuntu is RT3290 Wireless 802.11n 1T/1R PCIe on iwconfig I got the following lo no ...
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nmap scan on Ubuntu results in odd result

1. I ran an nmap scan on my system and this was the out put. hobbit@hobbit-OptiPlex-GX520:~$ nmap -v sU sT 127.0.0.1 Starting Nmap 7.01 ( https://nmap.org ) at 2016-06-25 20:08 IST Initiating Ping ...
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Unable to “Enable WiFi” on an HP Aspire XUbuntu 16.04

I recently purchased an HP Notebook 17-y020ca and installed Ubuntu 16.04. Having overcome some WiFi driver issues, I am now stuck in the final step of enabling the WiFi. This notebook has a Broadcom ...
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11 views

Can't change ip range pool OpenVPN Server

i'am new linux user. i have configure openvpn server, but i still don't know how to change ip range pool for client (by default 10.8.0.0)? i want to use 172.30.1.254 as my openvpn server and give 172....
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24 views

Ubuntu as Router / Bridge problems

I wanted to operate an Ubuntu16.04 as a Gateway for incoming VPN via fastd/batman and outgoing traffic to be redirected over an airvpn-tunnel (and later some more complex routing settings involving ...
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Ubuntu networking not working after driver reset

Sometimes my desktop will be unable to reconnect to wifi after losing my connection. I am using Ubuntu 14.04LTS. I have found I can recreate this problem by running sudo modprobe -r rtl8187 &&...
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Remotely log into multiple computers and run a python script

I am currently trying to set up network rendering with Blender using computers on different networks. I made a script that launches blender and connects to the host's computer. My problem is that I ...
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OpenVPN network asks for password

I setup a vpn connection under user_A and it works just fine (I used network-manager-openvpn-gnome to setup this connection). Now I added another user into my system (Ubuntu 16.04) -- user_B. I ...
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Upgraded to 16.04 — now have Flaky HTTP Connections

I have a laptop - Clevo W670RZQ - i7-6700HQ 2.60GHz Processor, Intel HM170, Dual Band Wireless -AC 3165 and Bluetooth Module, IEEE 802.11a/b/g/n, 433 Mbps, M.2 2230. Before, on 15.10, the laptop was ...