Managing and using network connectivity on a Ubuntu system

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9
votes
8answers
47k views

How to check if Network Proxy is really applied?

I'm trying to set Network Proxy to use my LAN's internet connection to update packages. while the proxy settings works on my firefox, but the package manager still cannot connect to Internet. I have ...
3
votes
4answers
25k views

How do I get a Qualcomm Atheros Killer E2200 gigabit ethernet card working?

I bought a new computer, hoping to dual boot Win 8 and Ubuntu 13.04. I have successfully installed both OS, but in Ubuntu I have no connection to the internet, even though the ethernet cable is ...
14
votes
6answers
12k views

Ubuntu One behind a proxy, how to make it work?

I am behind a web proxy server at work (no authentication) and I have set it up in Gnome (configuration applied system-wide). It works fine for accessing internet with a browser, but numerous ...
10
votes
1answer
17k views

Network indicator disappeared in Lubuntu [closed]

I just upgraded to Lubuntu 14.04 from 13.10 successufully, via do-release-upgrade. But after reboot, I found that the network indicator has been disappeared, so I cannot switch different network ...
35
votes
13answers
41k views

How can I capture network traffic of a single process?

I would like to examine the network traffic being handled by a single process, but simple network captures won't work since I am dealing with such a busy system (lots of other traffic happening at the ...
15
votes
2answers
15k views

How to set up dual wired and wireless connections?

My laptop has both wireless and a wired connection capabilities. Can I connect to a router A using wireless and a separate router B using wired ethernet at the same time without having to switch back ...
13
votes
6answers
20k views

How do I stop my ethernet network connection from dropping?

My ethernet-based network connection doesn't stay up consistently. I'm running a ping against the gateway and it will: Work for a minute Freeze, time out, or give multi-second response times Repeat ...
14
votes
3answers
18k views

How do I route my internet through a SSH tunnel?

Old Q How do I setup an OpenVPN server without root privileges? Is there a way to setup an OpenVPN server without root privileges? E.g. with configuration files in my home directory? If yes, how do I ...
4
votes
2answers
20k views

Ubuntu 14.04 Server - WiFi WPA2 Personal

I just installed Ubuntu 14.04 Server and cannot get wifi configured correctly to work with WPA2 personal and could use some help. There was a simple wizard during install where I selected my SSID ...
6
votes
9answers
45k views

Wireless shows up as disabled, how can I get it working?

$ sudo iwconfig lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bg ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=0 dBm ...
5
votes
7answers
17k views

Internet very slow in Ubuntu

I have ubuntu 11.04 as the os, both surfing the net and downloading stuff is a pain, it is really slow. I have turned ipv6 off, my connection is properly configured, but still it is very slow. I ...
10
votes
5answers
12k views

Why does Skype suddenly fail to log in? Turns out, it's tor!

I am not sure if I'm looking at a network problem or a bug here. Since the update to 4.2.0.11 my Skype can't connect any more. My room-mate has the same problem. We're both on Ubuntu Raring Ringtail ...
9
votes
2answers
5k views

Connecting to VPN prevents access to normal web sites

I have Ubuntu 10.04 installed with OpenVPN, and when I connect to a VPN, http access to non VPN sites stops working, until I close the VPN connection. To be more specific, both Chrome and Firefox stop ...
10
votes
2answers
9k views

How to disable/enable automatically connecting to WiFi?

Whenever I restart my WiFi router, Ubuntu tries to connect to my neighbours' WiFi networks. There's over 30 wireless networks in the area. Ubuntu prompts me for the password to all of those. This is ...
8
votes
4answers
2k views

How to reach a host in the same network by hostname?

I have a network which connects a couple of hosts. I would like to be able to reach other hosts from one of them using the hostname. I just discovered the ".local" domain, which is available through ...
4
votes
2answers
9k views

AR9285 Wifi on Lenovo z570 not enabled

Help please. Installed ubuntu 11.10 32bit on lenovo ideapad z570. When choosing Network Manager > Enable Wireless nothing happens. WiFi not enabling Tried the response of Wireless problems with ...
3
votes
2answers
14k views

how to install Wifi and Bluetooth drivers in ubuntu 12.04 lts

I am using HP Pavilion 15 -no11tu which has been awarded the status of Enabled for Ubuntu. When Ubuntu was shipped with my hp laptop,Everything worked fine including WiFi,webcam and Bluetooth. Some ...
3
votes
1answer
8k views

Wifi Not Working On Ubuntu 14.04 Lenovo G 50-30

I am facing problem to enable wifi on my Lenovo G50-30 Below are the command out put please help me out lspci | grep -i wireless 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. ...
2
votes
2answers
3k views

Rtl8187 wireless card drops signal within seconds

My Realtek RTL8187 USB wifi card is having trouble keeping a connection for more than a few seconds, while on the same machine under Windows 7 it has no problem. When I make the connection, I have a ...
2
votes
2answers
1k views

I can't use update manager, access Ubuntu related sites or Launchpad

I turned on my computer today and when I tried to run updates through Update Manager, it would just sit there slowly loading a repository forever. Then I tried to access ubuntuforums.org and it ...
0
votes
1answer
6k views

atheros wireless ar9285 driver

I have been having problems with wireless on Ubuntu 10 and above, Mint 11 and above. The problem is in the driver for the wireless... I can see that there is no driver installed and yet it works but ...
9
votes
11answers
53k views

Wireless is disabled by hardware switch on Dell Inspiron 1750

I have a problem where Ubuntu (12.04) says there is a wireless network card, but it is disabled by a hardware switch. How do I turn it on? I checked the BIOS, and the wireless card is enabled there. ...
6
votes
8answers
63k views

How do I set up an MTS MBlaze modem?

I have a new MTS MBlaze Broadband modem USB and it is not getting detected in my Ubuntu 10. 04. It is getting detected as an USB but not as MODEM as result I am not able to create a MOBILE BROADBAND ...
0
votes
1answer
731 views

NETIS WF2120 Wifi Adapter Drops Signal Within Seconds

I'm using Ubuntu 14.04 LTS. Basically, I can load like three webpages and then the signal drops. It still shows I'm connected with 4/5 bars or whatever you'd like to call them, but none of my ...
0
votes
1answer
2k views

Ubuntu 12.04 Dell 6400 no network

I have just installed Ubuntu 12.04. My network is not working: no wireless, no cable network. There are some posts on forums about it, however I was not able to fix it. It is possible to turn off ...
39
votes
12answers
96k views

List all MAC addresses and their associated IP addresses in my local network (LAN)

How can I list all MAC addresses and their associated IP addresses of the machines connected to my local network (LAN)?
18
votes
1answer
29k views

Where to set proxy ignore list?

I upgraded to ubuntu 11.10 from 11.04, shocked to see few things... My system is behind a proxy, so I did set a proxy setting. Being a web developer, I want to remove a lot of addresses that I type ...
19
votes
2answers
21k views

Send messages between 2 Ubuntu PCs (Net Send Style)

I am trying to find a way to send a message (like a popup message) from 1 PC to another. both are using Ubuntu. Already tried the smbclient way but this only works between a linux PC to a windows PC. ...
8
votes
1answer
33k views

Can not access Internet (DNS names do not resolve) after update today

I have been using Precise for a few weeks now for work with no problem. Today, I am not able to access any website using either wired or wireless connections. I installed the updates today which ...
14
votes
5answers
34k views

How to network two Ubuntu computers using ethernet (without a router)?

How can I network two Ubuntu computers, so that they can "see" each other at an IP address?
7
votes
3answers
2k views

2 internet connections on a single PC

If I have a wireless and a usb internet connection on my Ubuntu 12.04 as in: At the moment, Ubuntu seems to only make use of the Wired connection which is the usb connection. Is it possible to get ...
3
votes
3answers
9k views

How can I fix my WPA-EAP certificate problem?

I'm trying to connect my school's WiFi which has WPA-EAP. Everything else can connect to it except my ubuntu machine. I can connect on my HTC ONE X Android, OS X, Windows XP & 7, and iOS devices. ...
9
votes
2answers
9k views

How can I enable wake-on-lan permanently?

I want to enable wake-on-lan for my network cards, for always. The community guide recommends adding the relevant command to /etc/network/interfaces. In past experiences editing Ubuntu conf files, ...
6
votes
2answers
31k views

Configuring Ubuntu vmware guest NAT

I have a Windows host that runs guest Ubuntu VM via vmplayer. That virtual machine will be cloned, distributed among several people (running Windows hosts) and used for conducting a programming ...
6
votes
2answers
3k views

timeout errors in apt-get update/install

I'm trying to do an apt-get update or apt-get install xyz and I'm seeing timeouts like this: W: Failed to fetch http://eu-west-1.ec2.archive.ubuntu.com/ubuntu/dists/oneiric-updates/Release.gpg ...
3
votes
3answers
11k views

Broadcom BCM4401-B0 100Base-TX Issues

I installed Ubuntu 10.10 on my Dell Inspiron 1521 and the LAN/Ethernet card was working perfectly but Ubuntu was displaying a message about not installing the Wireless drivers because it was ...
0
votes
3answers
15k views

Is it possible to install Ubuntu through network?

I would like to install Ubuntu for almost 120 users. But it's very difficult in using USB and drives. please suggest ....
8
votes
1answer
4k views

How do I change the MTU value on Ubuntu?

If one's internet connection is being limited by a unit that restricts the transfer, how would one be able to change a setting related to it - more specifically the MTU?
3
votes
2answers
6k views

How to connect to the Internet (DSL) automatically at startup?

I also have to enter a password to connect. Not the root password, but a password I created for the DSL connection when installing Ubuntu. So I would like to get rid of the password and connect ...
0
votes
1answer
603 views

Wireless/wifi network is not working on ubuntu 12.04 - lenovo z50-70

I just ran below script wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script and attached the information here at ...
63
votes
0answers
87k views

How can I find my public IP using the terminal? [duplicate]

I am on DHCP, having dynamic IP. Finding your public IP when using a GUI and a browser is extremely easy. Simply go to Google.com and search for "What is my IP". Google will display it in the very ...
7
votes
1answer
4k views

How do I set up a network installation?

I want to know if the official 700MB installation images can be used to do a network installation. What would be the easiest way to do it?
5
votes
1answer
1k views

While using internet on ubuntu, all other computers get bad internet connection

I am currently using Ubuntu 10.04 Precise (in dual boot with Windows 7). Whenever I log onto Ubuntu Internet, all other computers Internet speeds plummet. Usually we have 20 Mbps download and 2 ...
2
votes
2answers
2k views

No mobile data on Nexus 4 Ubuntu Touch

I've installed 29/01/2014 Ubuntu Touch on my Nexus 4 (with .84 radio from Android 4.3). I can make/receive calls and connect to wifi but when I turn wifi off I see a 3G icon flash up two or three ...
2
votes
1answer
5k views

No wired or wireless networking available on Ubuntu 12.04 (wired work from LiveUSB)

I've just installed 12.04 in a dual boot with Vista via a LiveUSB. When I booted to the LiveUSB wired networking worked out of the box, and wireless networking didn't work. Now that I've installed ...
2
votes
2answers
4k views

Need a few reboots to connect to wireless

I am running xubuntu 12.10 on my msi wind U100 netbook. I have a problem with the wireless connection. Whether the wireless connects automatically to a known wifi hotspot (both at home and ...
2
votes
3answers
9k views

How to enable file sharing between two PCs?

How to enable file sharing between two Ubuntu Oneiric PCs. I have installed Samba both machines I have changed permissions to all create guest accounts file is in home folder Why cant I see shared ...
2
votes
4answers
5k views

How can I configure my server so that my domain points to it?

I have bought a domain name (without hosting), and at home I have a static ip address on Ubuntu server 11.04. How can I redirect users to my web server at home? What configuration needs to be done?
1
vote
1answer
2k views

Unstable wireless connection in Ubuntu 14.04

I have recently upgraded to 14.04, and I have realized that after certain periods of time from connecting to a wifi network, my computer suddenly disconnects and i have to disable and then enable wifi ...
1
vote
1answer
5k views

Lenovo b570 Broadcom Corporation BCM4313 wireless doesn't work

prumar@bluelaptop:~$ rfkill list 0: hci0: Bluetooth Soft blocked: no Hard blocked: no 1: ideapad_wlan: Wireless LAN Soft blocked: yes Hard blocked: no 2: ideapad_bluetooth: Bluetooth ...