Managing and using network connectivity on a Ubuntu system

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Network connections not working after new motherboard installation (Ubuntu 14.04)

So I installed a new motherboard with an existing Ubuntu install and now my network won't connect (wired). The first help thread I read suggested deleting /etc/udev/70-persistent-net.rules and then ...
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Cannot start created Wifi Access point in Ubuntu 14.04 LTS

My target is to create a Wifi hotspot using a wifi USB adapter in my computer that is already wireless connected. I'm using Ubuntu 14.04 LTS / 64 bit The USB adapter is a: TP-Link TL-WN823N This ...
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8 views

Can not connect to my public IP

I'm still a linux newbie and did something wrong with pptp configuration and now I can not access my computer with public IP. I wanted to configure a pptp vpn for my computer with pptpd, but i ...
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Maximum socket connection

I installed tomcat7 on Ubuntu server and I deployed my atmosphere (http://async-io.org/) application. By running the sample, I noticed that my server stops receiving incoming socket connection after ...
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1answer
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How to add multiple ips to ubuntu 12.04 server?

i hope that some can help me here. I have bought 6 additional IP:S and i need to run two gaming servers at same time for same game. So i need to add another ip so i can run these two servers at same ...
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WIFI not detected Acer 14.04, wlan not listed

Complete Info from wireless script.... ########## wireless info START ########## Report from: 14 Feb 2016 23:50 IST +0530 Booted last: 14 Feb 2016 23:36 IST +0530 Script from: 27 Sep 2015 00:34 ...
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how to send e-mail across a LAN

Using dovecot and swaks, I'm able to send mails from the "dove" user to "thufir", albeit on the same machine. sending: dove@tleilax:~$ dove@tleilax:~$ swaks --to thufir@tleilax.bounceme.net === ...
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1answer
11 views

Samba Share to Mac problems

I am working on building a small Ubuntu server to run Plex on. I have Ubuntu Server installed and up and running. I have installed Plex and Samba. I've mounted by separate internal drive (where I want ...
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9 views

Ubuntu as router; redirect traffic from 1 client (LAN) to VPN

I have a Ubuntu 14.04.03 router (iptables). Behind it there is a LAN with laptops, tablets, smart TVs, etc. I would like to use VPN on my TV, but there is no such option in the TVs software/firmware. ...
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hosts-files and/or dnsmasq does not work properly or is it? Xubuntu krnl 4.2.0-23

What is my problem? If I PING facebook.com (127.0.0.1) 56(84) bytes of data. but if I PING oglaf.com (208.113.148.140) 56(84) bytes of data. 64 bytes from ps1646.dreamhost.com ...
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VXLAN with namespaces

I'm stuck with VXLAN configuration between 2 namespaces. Creating namespaces and interfaces: ~$ sudo ip netns add pc0 ~$ sudo ip netns add pc1 ~$ sudo ip link add veth0 type veth peer name veth1 ...
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Connect 2 computers remotely

I'd like to know how to connect 2 Ubuntu computers a desktop and a laptop so that from the laptop remotely i can use sudo permission on the desktop
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ubuntu14.04 randomly loses ethernet connection

I have a wired Ethernet connection. Been running 1404 almost since it was released. Suddenly, this winter, my system started losing the wired Ethernet connection. This has become a regular event. Turn ...
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Ubuntu 14.04not connecting to wifi

I just bought a BRAND NEW lenovo ideapad and installed 14.04lts. Currently it shows the wi-fi icon as trying to connect but a few second later it shows the alert that I have been disconnected. Can ...
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23 views

Wireless adapter speed changes

I have an Xubuntu desktop in another part of house from router. I use a USB wireless adapter to connect. At first it works with a speed of 72 Mb/s. Then intermittently it will drop to 7 Mb/s for ...
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34 views

Can not configure eth0 and eth1

I have two physical networks: eth0 192.168.0.0/24 with with several PCs and NAT adresss 192.168.0.1 where PPPoE connecting to inet; eth1 192.168.0.1/24 with several PCs and no internet. auto lo ...
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How to directly save files into host machine from genymotion?

When I use whatsapp, Telegram etc on Genymotion. Files from that app can be download in Genymotion Virtual Device, but saving that files [video photo etc] in Genymotion virtual Device is contain to ...
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ubuntu have both ipv4 and ipv6 address but have no access to internet

I have both ipv4 and ipv6 address as below(by ifconfig) but cannot connect to internet (the wlan has only ipv6 address). eth0 Link encap:Ethernet HWaddr 54:ee:75:33:10:12 inet ...
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Securely load website content using http on local and https outside

Is secure to load page on local server (i have apache and nginx,where nginx is proxying to apache under specific port) with http and for setup https for output ? Example: I have service running under ...
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17 views

Ubuntu 14.04 unstable wifi

Wifi has been unstable for sometime now. I've tried following solutions from a couple of posts here, but I guess the solution to this problem isn't really a generic one. I'd appreciate if someone can ...
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Broadcom 43142 wireless not working with ubuntu Gnome 15.10

i tried installing bcmwl-kernel-source from the installation media and through terminal. my system detects the the device perfectly but when i try to activate it (turn on wifi) through network ...
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GA-990FXA-UD3 R5 motherboard has no internet connection during/after install Ubuntu 15.10

Here is my system: Motherboard: Gigabyte GA-990FXA-UD3 R5(rev.1) CPU: AMD FX-8370E GPU: Gigabyte GV-R929XOC-4GD Memory: 32GB Radeon DDR3 Performance Series PSU: 900W Hotkey Firstly I want to say I ...
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30 views

From where to start [on hold]

I am a network security engineer. However I have never worked on linux. Most of the firewall that i worked on had gui or their custom command line. Now I wish to get more deep in security specially ...
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35 views

Allowing only certain programs access a mobile broadband connection?

So I got a ThinkPad and I'm wanting to limit what programs are allowed to use the mobile broadband connection and disable the broadband whenever I connect to a wifi network. How can I achieve all of ...
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ubuntu 14.04 bridge + bonding (lacp mode)

I am trying to setup a bridged bonded interface and I cannot get it to work. I am able to ping google public server (8.8.8.8) yet I cannot access the internet with firefox. This is weird to me because ...
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1answer
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How to share folder from Ubuntu Server 14.04 using samba to 2 desktop, windows XP and Ubuntu in Virtual Box

I have 3 image in my Virtual Box. Ubuntu Server, windows xp and ubuntu 12.04. FYI, i've already install samba in Ubuntu server and the problem is that im stuck when trying to share folder from ubuntu ...
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Observium Web Interface not working

I have recently installed observium on Linux Ubuntu 15.10 running on a virtual machine (Vmware workstation 11) While polling a device using terminal (./poller -h all) it works just fine but when I ...
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Macbook Pro 13" mid 2010 no wifi

I have dual booted xubuntu 14.04 on to my macbook pro. Previously I had Ubuntu 14.04 LTS on this laptop with the same issue, but I never solved it. I cannot see any wifi networks when I click on the ...
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27 views

No network connection after restart Ubuntu 14.04

After performing the command sudo dpkg -i libnl-*.deb and restart the network manager, everything went well, both LAN and WLAN connections worked. But after restarting Ubuntu, same problem, no ...
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19 views

Bluetooth fails to recognize device Ubuntu 14.04

I have dual booted Windows 7 and Ubuntu 14.04. I am able to connect to my phone using Bluetooth in Windows. In case I want to connect my phone with Bluetooth in Ubuntu then I have to start Windows, ...
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wifi problems (ubuntu 12.04 on toshiba + TP-Link) Murphy Law

I have a toshiba portege z930 with ubuntu 12.04 and wifi is working greatly in any situation At home I have a modem router TP-LINK TD-W8970 V3 working perfectly with any device. Murphy law: my ...
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14 views

Share a local folder over LAN with CIFS

I have a folder (/share, which contains other subfolders and files) which I want it to be shared over my LAN. I've read out there that CIFS (replacing Samba) is the file system adequate to do such a ...
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1answer
29 views

Unable to change file attributes (e.g. immutable) on /etc/resolv.conf

I noticed that the network manager frequently changed my DNS server, so I wanted to set the immutable bit on the /etc/resolv.conf file, which didn't work. I noticed that the /etc/resolv.conf file is ...
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1answer
25 views

How to share external hard drive over wifi?

I have an external Hard Drive connected to my pc running ubuntu 15.10. I wanted to share the data on it over my home wifi network to access it using android phones. I tried various methods using samba ...
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1answer
24 views

Monitor Usage and Switch Off

Good day, I am currently looking at renting a VPS server for our Gaming group to use as a TeamSpeak server. We would like to keep it local, but are limited to resources and funds. I have found a ...
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Phpmyprepaid “setup.php” displays messy code

Help me ! I want to install "phpmyprepaid" on Ubuntu 14.04, on the tutorial they say to open this link on my browser. http://my-ip-address/phpmyprepaid/www/install/setup.php but it show this result ...
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Have to reconnect mobile broadband many times to establish internet. What could be the reason?

I am using Huawei E303 Model HSPA Stick in Ubuntu 15.10. But i have to keep on disconnecting and reconnecting the internet from the notification area 5-6 times to start browsing. Every time i get a ...
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14 views

Airodump-ng mon0 error

I have an error while starting airodump mon0 on ubuntu 15. Before that I was using ubuntu 14.04 LTS that works great for me, but after upgrading to Ubuntu 15 it shows me this error: ...
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Cannot detect wifi on a newly installed Ubuntu 15.10

The question has been edited according to the standard. The situation is: I have just downloaded and booted Ubuntu live media and update it by the commands sudo apt-get update and sudo apt-get ...
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1answer
20 views

How do I permanently delete networked printers?

I'm running Ubuntu 15.10 with the latest updates as of 2 Feb 2016. I use my laptop on my home Wi-Fi network and at at work on our school's Wi-Fi network. I have a Wi-Fi printer at home and a USB ...
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20 views

How to connect to a printer WiFi printer that doesn't have internet? [on hold]

if the title might be a bit weird to understand I'm gonna explain. Basically Ubuntu ( Gnome 15.10 ) doesn't want to connect to the printer wifi network because it can't be used like a router ( the ...
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package dependency tree with no internet

I installed Kubuntu 15.10 and it doesn't support any internet access method (wifi, ethernet, hotspot). I downloaded the network packages from Ubuntu archives with all their dependencies manually but ...
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path to source code for network subsytem [duplicate]

I am new to linux world (I guess question reflects it :) ). I am going through tutorial on wifi drivers and it says source code would be at net/mac80211/ieee80211_sta.c. I tried to look inside my ...
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How to unblock a website/download through Terminal in Ubuntu?

I was trying to install NS2 for my academic purpose. But in our Pondicherry University the repositories like http://archive.ubuntu.com are blocked through Proxy Server. When i want to install ...
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Internet is not working on my HP laptop

I can not connect to net,wired or wireless.I have seen here Installed Ubuntu 14.04 - cannot connect to internet with wired or wireless connection So sudo lshw -c network *-network ...
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Connect (rdp) debian server from linux mint machine [on hold]

I am trying to have desktop access to a debian server through my linux machine (using remmina as the software). Till now I have the necessary credentials to create a ssh connection. So far I have done ...
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(Just started using Ubuntu) Can't connect to Internet even with Ethernet plugged in

Booted up my desktop using a USB that had Ubuntu installed. Even though I have Ethernet plugged into my motherboard and my wireless card installed. I still can't connect to the network. I think the ...
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geany wont open files accross the network

This used to work, and now it doesn't. I have a sftp connection to another machine, where I open the folder and browse with caja, the file I would like to open. I right click, and select open with ...
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connect to server crashes mate-panel

I've experienced this several times on all the computers I have, running Ubuntu mate.I have a networked folder, and I want to edit some files, when I goto load the networked folder, the panel stops ...
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Eduroam Connects but there is no Internet

So my problem is the following: I'm able to connect to Eduroam in my university (Radboud in the Netherlands) but I have no internet what so ever and I don't get ping replies from anything else besides ...