Managing and using network connectivity on a Ubuntu system

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Can't connect to school internet

I recently got a new ubuntu laptop for school. The only problem is that I cannot connect to my school's network. To connect I have to select the network in my network list, then open a web browser and ...
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Trouble ssh connecting with Putty from windows to ubuntu

Hello all I've been looking all over this form for answers but I just can't seem to get it right. First time ubuntu user, and linux user for that matter. I have openssh-client and openssh-server ...
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ubuntu wireless hotspot? [duplicate]

I want to know how to share wireless connection and create a wireless hotspot. On Windows i use "netsh wlan set hostednetwork mode=allow ssid=myssid pass=mypass". And then "netsh wlan start ...
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25 views

WiFi not working on 4,1 Macbok pro

The computer gods are against me, as it took me 3 weeks to install Ubuntu in the first place, and now I'm having trouble with my internet connections. I have a Macbook Pro (4,1) running Ubuntu 14.04, ...
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I recently installed Ubuntu 14.04 and have trouble with Wi-Fi

This is the output of the wireless script that has been requested by the admin. My Wi-fi network is detected by other devices but not on the one in which I have installed Ubuntu. The wireless script ...
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problems with accessing shared folder from ubuntu to ubuntu

I have samba installed on both ubuntu 14.04 machines, and they're are both connected to the same network. + I have apache installed on the desktop machine. I made a shared folder in my home folder on ...
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12 views

Ethernet stop working after while

I have an ethernet issue, i connect to network but after while it stops forking, to bring it back on, i need bring eth0 down and up. I'm using clonned MAC address if it can by the problem, also I ...
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18 views

How I can prevent my WiFI enable itself?

I'm often use my LAN connection than WiFi so I keep WiFi disabled. But in some case (looks like randomly) system enable it. So how I can disable it till I need it? I see this post Disabled WiFi but ...
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20 views

MAC address NAT with ebtables for IPv4 and IPv6?

I have a virtual machine running in VMware. It has Ubuntu 14.04 on it. I want to install LXC containers on it, and have them use the same address space as the virtual machine. So, I created a bridge ...
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how to share folder in between two different workgroup on the same network?

My office laptop is connected to a domain. America.abcco.com WHen I bring my office laptop to home, I want to access a shared Ubuntu folder at home(Lubuntu 14.04) Office laptop windows 7 enterprise. ...
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Is there a filesystem with caching and location-awareness?

Is there a way to setup a filesystem spread on 2 machines A and B in the following way? A and B are not on the same local network. Connecting to any machine shows the same files Writes to any ...
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Wireless connects but cannot go to any web site; windows works fine

Ubu 14.04.1 x64 Broadcom wireless adapter I came to my home office this morning and connected to the wireless network there, which I've done in the past without issue (but I was on 12.04 then) but ...
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1answer
22 views

Reconfigure system (network) during boot based on HyperV information

I am running a HyperV environment with Ubuntu 14.04 server running in generation 1 guests setups. It runs nicely. I want to be able to clone the system (while shut down), give it a new name, and ...
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Networking Transmission Details

Is there some way in Ubuntu(commands or tools) to find Network Connection data packet's detail at Physical layer or Upper layers(Data, Network, Transport) up-to bit level. I want to analysis the whole ...
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Strange internet behaviour with ubuntu 14.04 on both wired and wifi

I have ubuntu 14.04 32 bits running on a fresh ssd on my dell inspiron1564. It has a Broadcom BCM4312 wireless interface and a Realtek RTL8101E/RTL8102E ethernet i/f. The laptop ran windows 7 on the ...
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1answer
23 views

How to create location map in nagios server?

I already complete the installation and configuring process in Nagios server on Ubuntu. Now, I want to create location map or network map in my own nagios server. How I can do it? Please given this ...
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46 views

JDBC Connection Pool details on Glassfish

I can get some basic information from Glassfish v4 about the JDBC connection pool from the CLI with asadmin: thufir@dur:~$ thufir@dur:~$ glassfish-4.1/glassfish/bin/asadmin Use "exit" to exit and ...
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how to know which type of user I am?

while reading about linux ,I got :: By default, Linux distinguishes between several account types in order to isolate processes and workloads. Linux has four types of accounts: Root System Normal ...
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Node.js websocket error “Error: listen EADDRNOTAVAIL Error: listen EADDRNOTAVAIL”

Application work fine on localhost but when it's connected to the server, it is giving the next error. Error: listen EADDRNOTAVAIL Error: listen EADDRNOTAVAIL at errnoException (net.js:904:11) at ...
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1answer
56 views

Wireless not working 14.04

I have been battling this issue and can not figure it out to save my life. It says I am connected to the Internet, however, I can not access Google or even apt-get update. I have been working through ...
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1answer
21 views

Ubuntu12.04 hotspot creation problem

I am doing this Creating a wireless network through EDIT CONNECTIONS, with wireless security as 128 bit paraphrase and shared to other computers. Then I am creating a network through create new ...
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Ubuntu 12.04 in a VM as DHCP / Router

Preface: I'm quite noobish Desire I have a bunch of IP phones I want to program using DHCP options 66/160. Our router is just a standard D-link so doesn't handle options. So I figured I would ...
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25 views

How do you measure TCP packets waiting in transmit queue?

I understand that there are queuing delays and processing delays prior to sending out a packets. However, do you measure those delays in linux or specifically ubuntu?
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1answer
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One time “firmware” upgrade script

I was wondering how you could make a script so that on first boot it changes files to a specific parameters? So it would be like if I just installed a fresh kernel. I want to run a script once and ...
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How to remote access Aster express through ubuntu?

I am using latest version of Aster express edition form Teradata and configured, which is run only in windows so create a virtual machine of windows on my Ubuntu machine, and its perfectly working in ...
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40 views

Wireless won't connect after resume - adapter is not asleep

Running 14.04 on a Samsung N150. I am having the same problem as described in this post To reiterate, this is NOT the 'adapter sleeping' problem; it sees the network(s) and starts trying to connect ...
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What does this test really do (Loopback TCP Network Performance)?

I found in the phoronix test suite a micro benchmark called "Loopback TCP Network Performance 1.0.1", the same kind of command used here: nc -d -l 9999 > /dev/null & time dd if=/dev/zero ...
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27 views

WiFi no longer working

My network indicator was not showing up in in my menu bar. I saw someone else had a similar question, so I tried running the same things that they did. I ran apt-get install indicator-network and also ...
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1answer
27 views

LAN networking problem

I have 7 PC with Ubuntu 14.04 on them. I want one PC be like server (i have lampp on this and it works but only on that PC), I want all to conect together using switch no router. So they can acces ...
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1answer
55 views

Wireless is not working on my lenovo E4430 having ubuntu 12.04 LTS (Realtek 8723BE802.11n PCI wireless). There is no icon to enable wireless

Initially wireless was working in my lenovo E4430 having Ubuntu 12.04 LTS. When I updated Ubuntu 12.04 in root, wireless stopped working. Now Realtek 8723BE 802.11n PCI wireless driver is not ...
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14 views

Transition from single node to multi node hadoop same

I've followed the hadoop single node installation steps from this link . And now following this link to connect them to make a multi-node cluster. I'm in the beginning of the steps and I just have a ...
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1answer
33 views

ssh-copy-id no identities found ubuntu error

I have two machines that were setup exactly the same with the same name and users and everything exactly the same. Each machine has two users with this names userA (userA@UserA) and userB ...
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How can I randomise my MAC address in response to probe requests?

I read recently that iOS 8 devices will randomise their MAC addresses when probed. In iOS8, Wi-Fi scanning behavior has changed to use random, locally administrated MAC addresses Probe ...
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My airtel 3G data card is not detected by Ubuntu 14.04. What should I do to make it work?

The dongle starts blinking but there is no any changes shown by operating system when I connect USB data card Airtel 3G to my laptop. Any help will be great. I don't see the mobile broadband in the ...
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2answers
133 views

Disconnecting wifi every few minutes

I'm new in Ubuntu and I have some small problem with my wifi. I manage to connect it after an hour of using this forum, however now whatever I'm doing I'm loosing the connection every few minutes. I ...
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Make sure the wlan0 uses the 5g mode in Ubuntu 14.04

I have a dual radio wifi and would like to connect my notebook Toshiba Portégé R830-1ED that supports 802.11a/b/g/n to it using the 5G radio band. Is there a way in Ubuntu 14.04 to connect to the 5G ...
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Wi-FI Stops Working upon Boot When Being Disconnected From Power While Turned Off

So the problem is fairly described in the title. The routine goes like this: -I turn off the computer. The power cord makes a beeping sound, so i disconnect it from the laptop before going to sleep. ...
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Wireless hotspot problem

My Ubuntu laptop connects the Internet though data card. When i try to use it in my mobile by turning on wireless hotspot in laptop i couldn't find any networks in my search result in the phone. I had ...
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1answer
83 views

Use Steam's In-Home Streaming across VPN (OpenVPN)?

Like the question says, I would like to set up an OpenVPN server using TAP mode to facilitate the game-streaming capabilities built into Steam to stream from a Windows 7 gaming machine to an ...
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26 views

disabling network managers effects

I was wondering what effects disabling the network-manager would have? I have two Ethernet interfaces declared as static in my /etc/network/interfaces file. When these two are declared the boot ...
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1answer
42 views

Installed 14.04 LTS dual boot with Win 8.1, now network not detected by either

Had to turn off secure boot and install Ubuntu in Legacy mode. I can boot to windows with boot option "OS Boot Manager", boot to Ubuntu using "Notebook Hard Disk" option in "Boot Optons" menu. First ...
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1answer
59 views

DHCP change requires reboot

I have a static IP set on my web-server. When I change static to dhcp the server needs to be reboot for the changes to take effect. Is there any way to make it so I can use ifdown and ifup to change ...
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54 views

Slow Google and Facebook Websites, everything else is fast

I cannot login to Google account (all Google products). I can login to Facebook, but only the login part is working, no more. I tried namebench for to find the best DNS Server and changed ...
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60 views

How to install ubuntu 14.04.1 behind an authenticating proxy

Hello I try to install ubuntu on vmbox with a NAT connection: What is going wrong is internet connection when installing to disc. I already added in a terminal: $ sudo -i # nano /etc/apt/apt.conf ...
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45 views

ifconfig eth0 down hangs

I'm facing a weird issue. I have a device with LINUX kernel 3.10.7 and root file system 14.04. After booting up, approx. 10 minutes after booting, the system hangs when I execute ifcofig eth0 down. ...
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27 views

wlan could not receive packets in ad-hoc network

I am trying to establish some Ad-Hoc network in Linux, but my wlan Rx packets: 0 while it does send something. I tried to check the Wifi module to other PC and it is working fine, so I assume that the ...
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38 views

Cannot SSH from Ubuntu, but can from Windows

Since the past few days, I cannot SSH to any server from Ubuntu! I am not sure why or how it began. When I try to SSH to any server, connection is established and I see the prompt for password. If I ...
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NL80211 not found but wifi works

currently I can use iwconfig and ifconfig without any errors, but when trying to use iw the command says nl80211 not found. I think the kernel uses rtl8192cu drivers but lshw returns the driver as ...
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29 views

Strongswan IPSEC configuration and certificate problem

am trying to establish an ipsec tunnel between host-to-host pc. I'am able to configure the ipsec.conf but the cert. & key i created using openssl are not working. I'am using 2 virtual box linux pc ...
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Exactly what is the definition of Ubuntu's airplane mode?

I am trying to understand what Ubuntu's airplane mode is, not in concept but in implementation. Aside from the visual indication of it in the GUI, exactly how is this state defined? Is it defined ...