Managing and using network connectivity on a Ubuntu system

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What is the cni0 interface seen on ifconfig

What does the cni0 interface denote? cni0 Link encap:Ethernet HWaddr 00:50:F1:80:00:00 UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:3 errors:0 dropped:0 overruns:0 frame:0 TX ...
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TP-Link TLWN725N V2 low signal

I'm using Lubuntu 14.04 - 64 bit, kernel 3.13.0-24-generic. My TPlink, is always with low signal(normally 2%). The other computers are working just fine with other wireless pens, with good quality ...
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IRQ Balancing-RSS-Flow affinity

I am playing with a multi-core system, in which i would like to get maximum ip packet forwarding performance.I am getting 1.2Mpps with Ubuntu 14.04, with new ixgbe driver. But when i am allocating ...
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how to open port to the world

I have installed postgresql (or any other service for that matter) on ubuntu 14.04.1.LTS I can start postgres and it is running. It accepts connections on port 5432. This is my netstat output: tcp ...
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Wrong throughput measruements in VBox VM running Ubuntu 12.04.3

I have one physical machine with Linux Ubuntu System (Host OS) installed on it. Besides that, the machine runs one Virtual Machine (VM) and one Open vSwitch Bridge. The machine has one virtual ...
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Problems with Network Manager in Trusty

I have Xubuntu Trusty on a Samsung laptop and have multiple issues with network manager. First it may stop connecting to any wireless network at all (it tries and fails). This happens after I turn ...
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12 views

SQLSTATE[HY000] Unknown host machine name (severity 2)

I have a problem in which I can not find a solution and I was hoping that you could help me out. I rolled back my server and now none of the php scripts can now connect to other servers. The scripts ...
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Wake-on-lan from suspend

I am trying to wake up my laptop from suspend using WOL but it didn't work at all. I found this old post for the same problem but I don't see how I can do this for Xubuntu 14.04 that I am using. I ...
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Network disappears from list, disconnects, others remain

and Ubuntu, with my first question. I have Ubuntu installed on three machines alongside Win7, so they are all dual boot. I have encountered a WiFi connection problem on one, a Compaq CQ62. The unit ...
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how to set multiple gateway

i need to configure multiple gateways in my ubuntu 12.04 server.For example i have two network card with different subnet ip address.172.10.10.0/24 subnet traffic should go via eth0 and 172.20.20.0/24 ...
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Networking issues in ubuntu 14.04

Im having some real trouble configuring my network in ubuntu server 14.04, I installed using (MAAS) and dhcp configuration hasn't worked, so I continued manually. The problem I'm having is that Eth0 ...
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Ubuntu BIND in LAN problems - DNS request timed out. timeout was 2 seconds

I've got a BIND9 setup on my local network via Webmin. A nslookup doesn't seem to work. Neither does ping google.de. Been looking around and trying several different settings. Nothing has worked so ...
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Internet connection problem in ubuntu 13.10 [on hold]

I have installed windows7 and ubuntu 13.10 on the same partition. I am using ethernet connection. I can able to connect to internet in windows7 but not in ubuntu. can anyone help me on this issue.
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Cant configure existing samba share

I am sorry for the probably dumb question. I have two Ubuntu server VMs - 12.10 and 13.10. A year ago I have configured samba on both machines somehow with documents share on each. Now I cannot find ...
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How can I debug intermittent high pings?

Recently my browsing and gaming (CCS) experience has been disturbed by sudden high pings. Here is an example: ping -i 20 google.com PING google.com (173.194.65.139) 56(84) bytes of data. 64 bytes ...
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“Connect to Hidden Wi-Fi Network…” is disabled in my Ubunutu 14.04!

I noticed that some items in network section of my taskbar is disabled. When Wi-Fi adaptor is enabled and no cable connected network is available, following items are available and only BOLD items are ...
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ubuntu server not seeing ethernet port

i am trying to setup ubuntu server on a normal desktop computer. the install went fine (even though it didnt connect to the internet) i figured i would have to change some network config settings. but ...
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Can access services on my machine by localhost:port but cannot by ip:port

I wanted to access my machine's http rest service (exposed on port 5000) but I could only do it via accessing localhost:5000 but not via 192.168.1.1:5000 where 192.168.1.1 is my IP. I tried after ...
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Is there a ubuntu server menu-based network setup tool like during ubuntu install?

During Ubuntu installation I enjoyed using the "Configure the Network" step: I always assumed that there was some dpkg-reconfigure command that would re-run this, and that if I ever wanted to use ...
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Bridging from a N150 netgear wireless access point to a sky modem

A DVR is connected to some wired cameras. The dvr has an IP output and I have the WN604 Netgear wireless adapter which I have set up as a point to point bridge. I can see the broadcast on my smart ...
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Significant wifi packet loss on Lenovo Yoga 2 Pro (Intel N 7260)

On my Lenovo Yoga 2 Pro (Network adapter Intel N 7260) I see approximataly 10% packet loss during ping the router. While on the same machine in WIndows there is 0% packet loss. The connection is ...
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Just installed 14.04 LTS, all apt-get attempts fail, why?

just installed 14.04 LTS from a usb-flash drive I built using the downloaded .iso image and a tool from pendrivelinux.com. I booted the PC off of the usb-drive, and the installation appeared to go ...
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Ubuntu Software Center Not Working!

I really new to Linux. I have no idea how to fix this problem myself. I have installed the newest version i belive. Unbuntu 14.04.1. When ever i launch the Software app, it loads for 30sec then force ...
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Can't connect to VPN in Ubuntu 14.04

This is the procedure I followed: Go to System Settings > Network > Add VPN Connection Set in the dialogs that appear: Interface = "VPN" Connection Type = "PPTP" Set the following params ...
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Huawei 3G modem take forever to be detected on 14.04

I Have been trying to get a Huawei E156 3G modem on ubuntu 14.04 and haven't succeeded until right now. What I did to get it to work? Nothing. I connect the device and the green starts flashing. ...
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Fix high network latency + traceroute problems

I've got this problem my Ubuntu server won't get up to the speed I'm paying my provider for (100 Mbp/s up and down). According to this thread I managed to do a speedtest, which resulted in the ...
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No network access until I ping the gateway

I have the weirdest of problems that I can't work out on ubuntu 14.04 LTS. When I start the machine I cannot access the internet and the machine's nginx server cannot be accessed. Running ifconfig ...
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my wi-fi is connecting but the Internet is not working

till yesterday everything was fine. The Internet had been working correctly. Today, when I started ubuntu it connected successfully but I couldn't open any web page or do any Internet activity, ...
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dns-nameserver entries are ignored after 127.x.x.x

I'm trying to configure a static eth0 in a 1404 vps (lxc container). My interface config is auto eth0 iface eth0 inet static address 192.168.1.1 netmask 255.255.0.0 gateway 192.168.10.10 ...
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Boot-tasks are being executed twice after upgrade to 14.04

after a distribution upgrade from 12.04 LTS to 14.04 LTS I noted that the boot-process took longer than it should. I took a look at boot.log and saw that some boot-tasks have been executed twice. ...
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How can I change my IP address?

I want to change my IP address and port to some other values. My idea is to attain anonymity when I browse in the web. Currently I am on a network having static IPs for each system. I know there are ...
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samba file server cant access my server

** (nautilus:2023): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-cMdjqnMPNR: Connection refused (nautilus:2023): Gtk-WARNING **: Failed to register client: ...
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problem entering my wifi password

I had to reset my Chromebook Laptop to it's factory settings, which wiped everything I had saved. Now it is asking me for ssid network name and password. Would that be the password I set up for my ...
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How to install Idea 3GNet Setter in Linux

I've bought an Idea 3G Net Setter and they have provided "Linux driver" and these are the installation details: 2 Driver installation 2.1 Launch command line By using “ALT+F2”, input” ...
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Not able to ping continuously Ubuntu 14.04 on lan

I am in a proxy server. Whenever I ping to any proxy, the ping works for few seconds then halts and again it starts pinging. This cycle continues. Same happens with internet access. Last time it ...
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nis server doesn't export new users to client machines

After a server migration on a new machine, the new users which are created on the server are able to login in it, but not on client machines (which get user list from the server). For the users ...
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Ubuntu 14.04 Server operated as a WIFI-LAN-Router drops packets between LAN and WIFI

I would like beeing able to exchange packets between WIFI and LAN. My Ubuntu 14.04 Server operated as a lan-wifi-router has two physical Ethernet Ports (p4p1 and p5p1) as well as a WIFI Module ...
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Ubuntu server detecting electricity outage?

I am in the planning stage for setting up my server and have some doubts. Firstly my network is something like this: One parent PC connected to the internet and 3 other child PCs which are not ...
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Both named and dnsmasq serving DNS on port 53?

Is this considered normal for Ubuntu 14.04 ? netstat -tulpn shows that both bind9 (named) and dnsmasq serve on port 53: Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address ...
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HP 3070a helds it's printing

I have a problem with HP 3070. It just holds printing and that's it. And I receive communication errors. After quite some time of searching on the internet, I have found some topic, which I hope can ...
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Ubuntu 14.04 - Issues connecting to Wifi with Asus USB-AC56

I recently installed the drivers for an Asus USB-AC56 WiFi adapter. I had success connecting using the instructions posted to How do I install an ASUS USB-AC56 WiFi adapter? I have since rebooted and ...
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How to configure 100Mbps network to laptop in ubuntu 14.04

Recently I have install ubuntu 14.04 in my laptop. at the time of installing I was connected to the my ethernet which is 100Mbps through the switch(Dlink which supports 10/100/1000 Mbps ethernet). ...
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Multiple internal servers hosted on one domain and one public ip

I'm aware of this question already, but this didn't help me yet and I may not ask more help on comments of other people. Situation 1 public ip and 1 domain, two physical internal servers. ...
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25 views

How to install WiFi driver?

I have a fairly new Gateway Tower. I couldn't play most games on it in Windows 7 so I suspected a glitch in the OS and installed Ubuntu alongside Windows 7. My WiFi still works on Windows, as that is ...
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All network connections close when laptop lid is closed 14.04

First of all, I'm not the most proficient beaver when it comes to linux in general but I catch on very fast. I'm using the x86 version of Ubuntu 14.04 LTS. I have a Toshiba Satellite L40-14F laptop, ...
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WiFi disconnects few seconds after boot in 14.04

So, basically every time I boot into Ubuntu I have to manually unplug my WiFi wireless adapter and plug it after few seconds. After that It works fine. This is info about my wireless adapter: ...
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Ubuntu 14.04.1 wired not working and frozen screen

I just installed Ubuntu (14.04.1) to my computer for the first time and I have several problems I can not connect to the internet with wired while I was looking to the internet for an answer to ...
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Samba share not letting me authenticate

I've set up a media server on my local network and I'd like to share a directory with the network. The directory path is /home/htpc/Media. I set up the network share like so. It all seems to be ...
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Connecting to Wi-fi [on hold]

Ok. So I am absolutely new to Ubuntu and I have the 10.10 version installed because the other versions wouldn't boot on my computer and every time I tried to boot them it would say missing operating ...
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ethernet stopped working on ubuntu 14.04, still works on windows

Everything was working fine on my Ubuntu 14.04 32 bit installation (on a Dell Vostro laptop) yesterday. I shut it down last night and since I powered it up this morning it is no longer handling the ...