Managing and using network connectivity on a Ubuntu system

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14
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7answers
34k views

Two ethernet ports on motherboard. How can I get double the bandwidth?

Direct Question: My evga classified motherboard has two ethernet ports. I want to use them simultaneously to improve the speed of a remote connection. (Yay for programming remotely). How do I do ...
0
votes
1answer
3k views

Ubuntu not connecting to wireless after restarting networking service

There was a problem with my internet connection and I thought that restarting the networking service might fix the problem. So I used sudo service networking restart command. However, my window ...
32
votes
4answers
13k views

How can you monitor internet download usage?

Some broadband providers impose a monthly download limit, charging extra if you go over. It is also quite easy to exceed some of the lower limits just by installing/updating packages and 'normal' ...
10
votes
3answers
26k views

How to merge multiple Internet connections into one?

My PC has a total of 4 NICs, 2 wired Gigabit Ethernet network cards and also 2 wireless network cards. (One Broadcom with proprietary drivers and Ralink with open source software, which works much ...
18
votes
3answers
23k views

How can I (from CLI) assign multiple IP addresses to one interface?

On my server I want to assign several IP addresses to one NIC, but without using the deprecated ifconfig or the obsolete "alias" notation (like eth0:0) in /etc/network/interfaces because in IP ...
10
votes
9answers
83k 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 ...
18
votes
7answers
57k views

Restarted computer during update; “the system network service is not compatible with this version”

Yesterday I upgraded my Ubuntu by SSH but before I finished it, I restarted my computer. I know that was not very smart. Anyway now I don't have internet connection, the WiFi or Ethernet is not ...
13
votes
5answers
12k views

Internet slow on Ubuntu but not windows using a RTL8111

I have just installed a dual boot windows7 /ubuntu 11.10 and the internet is much slower than windows. I have read the post here and tried the solutions presented and none have worked. Here is what I ...
5
votes
2answers
18k 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. ...
5
votes
7answers
23k views

WI-FI doesn't work (Hard Blocked) [duplicate]

Yesterday I installed Ubuntu 12.04 for the first time (I've always been a Windows user) as I was at the office and I had the Ethernet connected. At home I only use WI-FI. When I started Ubuntu it ...
3
votes
4answers
15k views

How do I get an iball 3.5G modem working on Ubuntu?

I purchased iball 3.5G connect wireless modem 1 month before. I am trying to connect it with my laptop which is having ubuntu Operating System. After plug-in it to the ubuntu system it is not ...
1
vote
2answers
5k views

Ubuntu 12.04 Realtek RTL8188E Wireless Card Not Detected

I have Ubuntu 12.04 (WUBI) on my Toshiba Satellite. I have a Realtek RTL8188E Wireless LAN 802.11n. The internet works fine when I plug it in using a ethernet cable, but my laptop doesn't even search ...
53
votes
11answers
201k 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)?
47
votes
6answers
189k views

How do I fix a “Wireless is disabled by hardware switch” error?

I just updated to Ubuntu 12.04 from 11.10 but soon after updating I was disappointed to see that Wireless is disabled by hardware switch. I can not click the button 'Enable wireless' which is ...
50
votes
3answers
80k views

How can I see what ports are open on my machine?

I would like to see what ports are open on my machine, e.g. what ports my machine is listening on. E.g. port 80 if I have installed a web server, and so on. Is there any command for this?
18
votes
5answers
22k views

How do I SSH to machine A via B in one command?

I want to access a computer, say machine A which is based in my university's network. However, this computer is only accessible via the internal network of the university, so I can not use SSH to this ...
8
votes
1answer
25k views

Connect Ubuntu to other PC with direct (crossover) cable

Ubuntu 11.04 (PC-1) is connected to PC-2 (Windows XP) with LAN cable (crossover direct cable) Internet access is through USB wireless modem accessing router in separate room If I boot in Windows 7 ...
4
votes
4answers
33k 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 ...
15
votes
0answers
12k views

Command to know my external IP address? [duplicate]

How can I get my external IP address using the Command Line?
15
votes
2answers
40k views

Network Manager Icon disappeared 14.04

So a couple of weeks ago my network manager icon stopped appearing; I still get automatically connected to my saved networks and the internet works fine, etc. If I go into System Settings and look at ...
5
votes
2answers
13k 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 ...
3
votes
2answers
25k views

how to install Wifi and Bluetooth drivers in ubuntu 12.04 lts [duplicate]

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 ...
1
vote
2answers
7k views

Unable to connect wifi ubuntu 14.04 LTS HP Pavilion Network driver rtl8723be

I have purchased a new HP Pavilion 15-ab030TX, just installed dual boot Ubuntu 14.04 next to Win8. But my wifi has been showing either very weak signal at times or none at all. I tried multiple ...
2
votes
1answer
1k views

No Wifi in Qualcom Atheros - Ubuntu 16.04 - Acer Aspire E 15

After Installing Ubuntu 16.04 in Acer laptop with Qualcom Atheros , it does not work. I tried , sudo rfkill list all 0: hci0: Bluetooth Soft blocked: no Hard blocked: no 1: acer-wireless: ...
0
votes
1answer
546 views

Wifi is frequently disconnecting

The Wifi is frequently disconnecting in Ubuntu 15.04. My Wireless interface of Ubuntu is RT3290 Wireless 802.11n 1T/1R PCIe When wifi is disconnected, on iwconfig I got the following eth0 no ...
127
votes
12answers
207k views

How to display network traffic in terminal

how to display the actual network traffic (wireless) in a terminal? Additionally: Is it possible to add this info to the chart of top?
53
votes
13answers
67k 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 ...
32
votes
3answers
11k views

How to run a script, depending on internet connection

I often mount a remote drive using sshfs. I would love to have this mount automatically. However, if I mount it in my .bashrc or startup scripts, the mount often fails because my wireless internet ...
19
votes
2answers
21k 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 ...
16
votes
2answers
5k views

How do I run Juju on a local server?

I'd like to use juju on my server at home to get to know juju and play with it. I have multiple computers and would like to access what's on the server from any of them. When I went through the ...
10
votes
1answer
20k 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 ...
7
votes
3answers
7k views

Is there any way to install Atheros e2400 drivers?

I have a new motherboard: MSI Z170A GAMING M5. This motherboard has an Atheros killer e2400 Ethernet controller. When I do lspci -nn, I get: 03.00.0 Ethernet controller [0200]: Qualcomm Atheros ...
5
votes
7answers
19k 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 ...
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 ...
8
votes
1answer
26k views

How to make X.org listen to remote connections on port 6000?

This is on Ubuntu 10.10 (Maverick Meerkat) 64-bit desktop. I want to make my X server listen to remote connections from clients in other machines on the local network. I know about ssh -X and that is ...
3
votes
2answers
5k 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 ...
12
votes
11answers
68k 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. ...
0
votes
1answer
4k views

Installing TP-Link TL-WDN4800 Adapter with Ath9k

I just bought a wireless adapter and am still trying to install its drivers onto Ubuntu. I have looked up ath9k and seen that it is compatible with kernal module ath9k. I'm new to ubuntu and most of ...
71
votes
1answer
99k views

What is the loopback device and how do I use it?

What are loopback and localhost? Why do they exist, what are they used for, and how would I use them?
23
votes
5answers
67k 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?
14
votes
3answers
64k views

KVM Bridged Network Not Working

I just installed KVM on my Ubuntu Server according to this guide : https://help.ubuntu.com/community/KVM/Installation Then prepared a bridged network as shown in here : ...
13
votes
6answers
25k 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 ...
9
votes
1answer
26k views

Installing the driver for TP-LINK TL-WN727N on Ubuntu 14.04

I am new to Ubuntu and I have problems with my Ubuntu 14.04. I plugged my wifi adapter but it did not work so I guess I need to install the driver manually but I don't know how to do it. I currently ...
8
votes
1answer
44k 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 ...
21
votes
2answers
139k views

Assigning a static IP to Ubuntu Server 14.04 LTS

I've installed Ubuntu 14.04 LTS Server in my machine on a separate hard drive while having my Windows 7 installation. The Windows OS has its full network connectivity and internet access through the ...
17
votes
3answers
27k 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 ...
6
votes
9answers
60k 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 ...
3
votes
2answers
8k views

My Wifi drops the connection after a few minutes realtek8723be

After install Ubuntu 14.04 LTS ... everything works fine withouth doing update ... after few minutes my wifi drops wireless conn .. I must to reboot for using it again. My Network controller: ...
3
votes
3answers
14k 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. ...
7
votes
1answer
4k views

Network manager issue: The system network services are not compatible with this version [duplicate]

I have seen relevant solutions in askubuntu and other sites but none worked for me so far. I reinstalled network manager, modem manager, tried to upgrade them and manually install everything, also ...