Managing and using network connectivity on a Ubuntu system

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Error message when I want to connect to VPN gate

When I want to connect to vpn gate ,I get "vpn network service start failed" in Chinese,and syslog get msg like this Oct 20 13:28:15 sura-K55DR NetworkManager[1249]: <warn> nl_recvmsgs() error: ...
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Ubuntu Touch doesn't connect to open WiFi

I brought my Nexus 7 (2013) running Ubuntu Touch to a coffee shop today. I was unable to get it to connect to the open WiFi there. The same Nexus 7 happily connects to my home WiFi, which uses WPA2 ...
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21 views

Ethernet and wifi are gone

Just rebooted an HP SpectreXT netbook after a Kubuntu update and there's no more network access. ifconfig only shows 'lo'. In the network manager I cannot turn on wifi. The ethernet cable is connected ...
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Network Manager unexpectedly disconnecting from wireless

lspci: Oct 19 13:49:57 linux NetworkManager[850]: <info> NetworkManager state is now CONNECTED_GLOBAL Oct 19 13:49:57 linux NetworkManager[850]: <info> Policy set 'ECURB' (wlan0) as ...
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Ubuntu 14.04 'takes over' wireless Brother printer

I have this weird problem with my Brother dcp-J552dw printer. I have installed drivers for Ubuntu 14.04 in my laptop and everything is working properly (the connection is wireless). Also, there are ...
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27 views

Connecting 14.04 to Windows 8.1

I have a machine with 14.04 and a Windows 8.1. They are connected to a gigabit router. Both are connected to a VPN. The Windows machine is able to see the Linux machine and copy files to it. The ...
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10 views

Slow ethernet in Ubuntu 14.04

I upgraded from Ubuntu 12.04 to 14:04 and everything works well except for Ethernet connection. I can connect to the internet but the connection is extremely slow. Any idea what might be wrong? Below ...
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Tata Photon + is not starting up,Why this? [on hold]

I'm bored while operating these OS, it's seems very hard.Not understanding anything what to do?
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17 views

Create wirless interface?

i want to create an wirless interface using iw. sudo iw dev wlan0 interface add wlan1 type station after when i look at ifconfig -a there is: eth0 Link encap:Ethernet HWaddr ...
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11 views

How to remove all network connections?

I have collected a lot of network connections over time. When I go to Network menu in topbar, and to Edit, the Edit Connections dialog shows just one out of three connections. The other two are not ...
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10 views

Broadcom driver not working after HDD install

Complete Newby here.....I download and copied the latest version to a USB stick. When it booted I went to sytems/software and it automatically found my broadcom network card and I could install the ...
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WIFI PEAP frequently disconnecting

I'm experiencing frequent and random disconnections under my university wifi. I'm using a PEAP security protocol and I set everything correctly but I can't stop getting disconnected. I tried with a ...
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telnet: Unable to connect to remote host: Network is unreachable

I am not able to connect to gmail with telnet using any of the ports. I am using this command: telnet smtp.gmail.com 25 and it gives following error: Trying 74.125.68.108... Trying ...
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11 views

Lubuntu 14.04 wifi disabled (greyed out)

I have an ASUS-eee 900 which I recently started using as a network server with Lubuntu 14.04. I've added two 32Gb USB thumbdrives for this. All was running OK for the last two weeks, when suddenly ...
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15 views

Connection to tor network and proxy server fails after vpn connection or running a local server

I am on Ubuntu 14.04. I am facing this weird issue which I never faced before. I am a university student. I have multiple proxy servers to which I connect for internet. Everything works fine when I am ...
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static ip address in ubuntu 14.04TLC does not work

If you are reading this you are probably banging your head against a wall because your linux box is not resolving dns requests. It might appear to be hanging. You do not need to change ...
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11 views

Routing particular services over VPN

Running Ubuntu 14.04 LTS. I need to connect to a SMB share that isn't local. The only way I can connect to it is over a VPN. The particular VPN service is Juniper. Connecting to the VPN is easy and ...
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19 views

Samba will not accept my password

I have recently done a fresh install of Ubuntu 14.04lts. samba is installed and I can see the computers in my workgroup. I was able to transfer files from a Windows XP computer on my workgroup ...
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19 views

wlan0 is missing, shows lo instead (14.04)

I've tried all the solutions I've found on the internet but none of them have worked. In my laptop, I have a Realtek RTL8723AE wireless card. It was not getting consistent connections, so I was ...
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Can't access internet via ad hoc in Ubuntu 14.04

I've got very weird situation. I have PC with ethernet and wireless. On PC I've created ad hoc network in Ubuntu 14.04, and I'm trying to connect it with my laptop Ubuntu 14.04. What is weird: ...
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Wlan0 missing after taking ownership of VM due to suspended session

I'm using Ubuntu for about a month and, after installing it, I configured my internet connection on /etc/network/interfaces to # interfaces(5) file used by ifup(8) and ifdown(8) auto eth0 iface eth0 ...
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Unable to access Windows share from Ubuntu 14.04

I can access a Windows network drive on different domain on windows using Windows + r, typing \\servername and authenticating myself using my credentials on the domain using domain\username and ...
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why do all bad hostnames resolve to 198.105.254.23?

I'm running 14.04 on a desktop and laptop connected to a DSL router and am unable to get any of the internal hostnames to resolve correctly. When I dig desktopname: ; <<>> DiG ...
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Wireless not working ( realtek RTL8191SE ) help please!! (New card recommendation?)

Lenovo edge 13 - Realtek RTL8191SE My wireless is not working can anyone help? It goes to wifi hotspot every time i turn on computer, and if i change it to off and close the window it will be ...
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6 views

VSFTPD Passive mode picking random ports

I'm trying to set up an FTP server behind a TP-Link TL-R470T+ router. I have set up port forwarding of port 21 and ports 6000-7000. This is the relevant section of my vsftpd.conf pasv_enable=Yes ...
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Command to measure SNR ratio on an ad-hoc network

I'm working on a project with Ubuntu 14.04 where I need to connect multiple Ubuntu devices on an ad-hoc network and measure the SNR ratio. I'm using the TP-LINK TL-WN7200ND USB wireless adaptors for ...
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Juju Bare Metal 14.04 behind proxy ignoring proxy settings

I have installed Juju on my MAAS server (Ubuntu 14.04 LTS) and provided the following environment.yaml (debug output attached): http://pastebin.com/a02LnNbw When I run juju anything (bootstrap, ...
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13 views

PCI-Express wireless card causing issues

Since I installed the TP-LINK TL-WN881ND 300MBPS WIRELESS N PCI EXPRESS ADAPTER I've experienced several issues. The keyboard gets disconected at random intervals, the mouse sort-of loses power (the ...
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18 views

ftp download using LWP::UserAgent failing

I am a noob with ubuntu and was trying to download some files from a ftp server. Home PC with Ubuntu 14.04 connecting to internet through a router. The code I am using is # Program to download ...
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hardware info of computers in a lan

Need your support for a simple problem. I need to know all the hardware info of the computers connected to my LAN. Is there any way to do that via LAN, without having to ssh to each system?
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7 views

Connect to WAP using WPS

Is it posibble to connect to a Wi-Fi AP through WPS? I have followed this other question How to connect to Wi-Fi through WPS?, but haven't had any luck at getting it working
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How do I disable the default Broadcom Wireless driver in favor of a Windows driver

I'm running Ubuntu 14.04 LTS 64-bit and I'm trying to get my Cisco AE2500 USB wireless receiver to pick up the wireless signal. Initially during the install of Ubuntu onto my system I had it ...
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Wifi doesn't connect in ubuntu 14.04

It shows wireless network but doesn't connect. But connect with wired connection. Please help me..... I have tried thisenter link description here but it but did not work.
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Unable to connect to Wifi. Restarting networking service on Ubuntu 12.04 fails

I unable to connect to WiFi despite entering the WiFi password correctly. But I am able to connect to the internet via a wired connection. I tried restarting the networking service. I got the ...
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Fundamental difference between a Ethernet (networking) driver and a pcie driver

May be its a dumb question but can somebody explain the fundamental difference when you say a pcie or a Ethernet drivers. As such there are many networking cards with pcie interface. Consider below ...
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Juju deploy charm juju-gui fails with connection time out

I am using Juju 1.18.4. The environment is bootstrapped and here is the juju status environment: maas machines: "0": agent-state: started agent-version: 1.18.4 dns-name: ...
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No network after unplugging cable and plugging it back in

I have: OS: Kubuntu (x64) Distributor ID: Ubuntu Description: Ubuntu 14.04 LTS Release: 14.04 Codename: trusty Kernel: 3.13.0-29-generic My network card works OK when I boot up my laptop, but ...
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26 views

How to automate running dhclient (without sudo) when starting a mobile broadband connection?

I use a mobile broadband dongle to connect to the internet but I'm able to download/upload only after executing manually sudo dhclient everytime I turn the connection on from the network manager menu ...
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isc-dhcp-server Failes to restart

I am tasked at school to setup a DHCP server for personal use. After I've set my configs and try to restart isc-dhcp-server i get this Stopping ISC DHCP server dhcpd (fail) Same when trying to ...
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36 views

My internet works EXTREMLY slow (Asus SABERTOOTH 990FX R2.0)

I'm completely new to ubuntu (14.04). Friend instaled it on my compuiter yesterday and we ran into problem that internet runs extremly slow. Sometimes page times out. I have instaled Win 7 on SSD. ...
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Benchmarking DNS queries

I've recently switched to a router that allows me to set the network's DNS resolution to an internal server. Because of that, I'm playing around with a few DNS caching techniques (like bind9, pdnsd, ...
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Ubuntu 14.04 No WIFI! (Beginner/Noob at Ubuntu)

I've just recently installed Ubuntu along side my Windows 8 and under the network connections there weren't any options for wifi! I'm currently connected via usb wifi (tethered from my cell phone). ...
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1answer
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Ubuntu 14.04 Server Install Image. Need to get Internet access

when i was installing Ubuntu 14.04 Server Install Image, i got a DHCP error. I said continue without configuring DHCP. I completed my installation and the server is up and running. The server is ...
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Wireless Signal out of range if not sitting right on top of router [Ubuntu 14.04.1 LTS 64-bit]

I'm currently running Ubuntu on its own, no dual boot. I had it connected via Ethernet initially so it could update itself while it installed. After setting it up and getting to my desktop, I put in ...
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1answer
14 views

Ubuntu MAAS DNS not forwarding request

I am trying out MAAS but I am having trouble getting the node to reach the internet. This is my setup: 3 physical machine, with 1 of them having two network cards acting as gateway, cluster ...
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1answer
24 views

Uninstalling GNS3 installed from source

i installed GNS3 from source be executing 'setup.py install'. Now i wonder how to remove it, as there is no uninstall option in setup.py. I can do a dry run to see which files are created so as to ...
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33 views

TCP Connections [on hold]

I am reading the article here Get Detailed Information About Particular IP And, I am very concerned about the output from the results. When I entered the command from that site: sudo netstat -nat | ...
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Local DNS server 127.0.1.1 fails often

This problem happens only at my workplace and only with my laptop, not my colleagues'. The problem is that DNS resolutions fail often. Sites won't open, git pushes won't execute, and i have to ...
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7 views

Is it possible to make my Hawking HWUN 4 USB wireless network adapter work?

I have a HAWKING HWUN4 USB wifi adapter but the company does not offer a Linux driver and I just did a fresh Ubuntu install and it is not working. Is it possible to somehow get this to work? I'm ...
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22 views

Setting up wireless network connection [on hold]

I know there are dozens of questions with this title already out there, but I have read through at least 10 and none are specific to my problem. I just installed Ubuntu 14.04 onto my brand new HP ...