Managing and using network connectivity on a Ubuntu system

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12
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7answers
21k 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 ...
12
votes
1answer
3k views

How do I ignore a proxy if not available?

Following the instructions in Best way to cache apt downloads on a LAN?, I've set up a caching proxy in my local network. Since that machine is not always up, I'd like to be able to refresh the ...
12
votes
1answer
23k views

How to share files using a Wireless Network?

I have a desktop (Ubuntu 13.04 & Win 7 Home Premium) and a Laptop (Ubuntu 12.04), both having WiFi adapters. I also have a WiFi router connected to internet which both my computers can access. I ...
12
votes
2answers
5k views

How to configure an OpenVPN Client Router

I am attempting to set up an OpenVPN Router so that I may connect my tablet (wireless) and Blu-Ray (wired) to a paid VPN service in another country on Ubuntu 12.10. I have successfully done this using ...
11
votes
3answers
50k views

Using scp to copy files from remote to home machine

This is probably a simple error, but I can't work it out. My computer hostname is Felix (hostname -f returns Felix) I am trying to move a file from my university account to my home computer using scp. ...
11
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3answers
36k views

What's the default /etc/network/interfaces?

I messed up my network configuration. Can anyone help me and copy the default /etc/network/interfaces?
11
votes
3answers
22k views

How do I connect to a server with thunar in Xubuntu?

In Ubuntu running Gnome 2 you were able to select "Connect to Server" from the Places menu and you would get a graphical connection to whatever server you connected to. Example: How can you do ...
11
votes
1answer
24k views

What are ICMP redirects and should they be blocked?

After enabling ufw and the Tiger security auditor, I see warnings saying: The system accepts ICMP redirection messages What are ICMP redirection messages? Should they be disabled for security ...
11
votes
6answers
5k views

How to control an Ubuntu PC from another Ubuntu PC over Internet, using mobile broadband connections?

There are two Ubuntu PCs called A and B. A and B are connected to the Internet using two separated Internet connections. (In my case, two mobile broadband connections ppp0 x2 ) Each connection has a ...
11
votes
1answer
3k views

Automatically disable wifi (wireless) when wired?

What's the best way to automatically disable my Wifi/wireless connection whenever I plug in a wired Ethernet cable? I'd like it to be re-enabled when I later unplug the wire. Also, I sometimes like ...
11
votes
8answers
17k views

How to make my proxy settings change depending on the network I connect to?

My company's corporate network requires me to set a network proxy to access the net, but when I am anywhere else, I don't need it. The proxy settings in Ubuntu (System -> Preferences -> Proxy server) ...
11
votes
1answer
962 views

hp-probe find printer network or alternative

I am working in a environment where we have different network. One of them are used for printers (192.168.x.x) and 1 for wireless network (10.1.x.x). I need to add a printer HP C3505 (192.168.x.x) on ...
11
votes
8answers
107k views

How to configure proxy authentication to work with Ubuntu Software Center?

I have tried put in apt config Acquire::http::proxy, and in Network>Network proxy with and without user:password@server:port and using environment variables http_proxy and https_proxy. Nothing seems ...
11
votes
1answer
2k views

Nethogs ioctl failed while establishing local IP

When I typed sudo nethogs eth0 in terminal and tried to monitor my internet bandwidth, I got an error ioctl failed while establishing local IP for selected device eth0. You may specify the device on ...
11
votes
5answers
8k views

Wake from hibernate on ssh request

Is there a feature (or aptitude package) in Ubuntu 10.04 that will wake my computer up from standby when it gets an ssh (or other webrequest). I've been trying to put my computer in hibernate/standby ...
11
votes
1answer
15k views

Networking with Multiple Nics

I have an Ubuntu 12.04 server with 4 Network adapters in it. I need to use each NIC for a separate function. Here is a description of my setup: etho = 10.234.0.2 netmask = 255.255.255.252 gw = ...
11
votes
4answers
27k views

Editing network interfaces without system rebooting

I'd like to make some changes to my networking configuration by editing my /etc/network/interfaces file. What's the cleanest way to make changes to this file and have them take effect, without having ...
11
votes
3answers
20k views

What does “ping: sendmsg: No buffer space available” mean?

I had an intermittent issue (which resolves itself spontaneously, after using a different connection for a while) that caused Internet requests to fail, with one particular wireless network. After ...
10
votes
3answers
11k views

How do I find out the name of the SSID I'm connected to from the command line?

Neither iwconfig nor iwlist seem to be able to do this for me.
10
votes
7answers
13k views

Is there a program to see channels used by wifi networks (similar to Vistumbler) in Ubuntu?

I need to see the channels used by all wifi networks in range in order to improve my wifi connection by selecting the channel to be used by my modem (a procedure related to the 'freebox' modem). In ...
10
votes
2answers
21k views

How do I add an additional IP address to /etc/network/interfaces?

I have an extra IP address available to my server, and so I need to assign it in the interfaces file. At the moment, I've got this: auto lo iface lo inet loopback auto eth0 iface eth0 inet static ...
10
votes
2answers
21k views

Cannot connect to WPA2/WPA Enterprise (PEAP and MSCHAP)

I cannot connect to my campus Wi-Fi connection through Ubuntu 13.04 but I can do the same through Windows. [ 1293.944518] wlan0: authenticate with 00:1a:1e:d5:f0:30 [ 1293.953216] wlan0: send auth to ...
10
votes
9answers
21k views

Wireless Network in Virtualbox

I just installed my first Ubuntu Server (12.04) instance and immediately ran into the following problems: Running apt-get install or update fails (see below) Running ifconfig produces peculiar IP ...
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 ...
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 ...
10
votes
10answers
5k views

Can't browse the internet nor ping a host, but dig works

I am not able to browse any websites. Please take a look at the following error: karthick@karthick:~$ ping www.google.com ping: unknown host www.google.com Update ...
10
votes
2answers
1k views

Is it possible to auto-mount sshfs

Is it possible to auto-mount a remote FS using sshfs upon instantiating a proper VPN connection? Allow me to explain the scenario, I'm working remotely, to do that it helps if I can mount my home dir ...
10
votes
2answers
20k views

Which type of VirtualBox networking should I use? [closed]

I'm trying to use VirtualBox on my Mac to host a couple of VMs. Host OS: Mac OSX 10.7.2 Guest OS: ubuntu 11.10 server 32-bit Each VM should be able to connect to the Internet (this is needed ...
10
votes
1answer
10k views

Should I set up my CUPS Printing to use IPP, LPD or URL?

When I got to add a network printer, I'm always confronted with the same dilemma: Do I set up the printer via IPP, LPD, or using it's IP address (AppSocket/Jetdirect?) and why? What are the ...
10
votes
4answers
4k views

Why does my internet speed roughly *double* when switching from Ubuntu to Win XP?

From the same Ethernet-socket from the same machine (IBM Thinkpad X41) I get > 40 Mbps from Win XP ~ 18 Mbps from Ubuntu Apart from the fact that I'm officially paying for 50 Mbps and that for ...
10
votes
3answers
3k views

Is there a tool for validating /etc/network/interfaces files?

I always like to test new config files before deploying them--with tools like apachectl configtest and named-checkconf. It's rare that mistakes crop up, but catching them before deployment ...
10
votes
4answers
8k views

How do I configure WiFi to log in to WPA at boot time, regardless of user being logged in?

How do I set a system wide wireless WPA password that starts at boot time, allowing me to SSH in to the machine from outside, for example? I'm running mythbuntu. Until I log in, WiFi doesn't connect, ...
10
votes
3answers
8k views

Any way to restore connect to windows share as a different user?

When I upgraded to Ubuntu 13.04 the file manager lost the ability to connect to windows shares as a specific user(from 'connect to server') from the file manager. I could be connected to z share as ...
10
votes
1answer
2k views

How can you broadcast a network share (ftp/sftp/webdav) so that it shows up in nautilus for other users

Is there a way to broadcast a network file sharing server that is using a protocol like ftp, sftp, webdav, so that it shows up in naulilus under network:// . I once connected to network where I ...
10
votes
2answers
6k views

Extend Desktop to Monitor over LAN

I want to make use of an old laptop by extending my the desktop from my main PC onto the monitor of this other, old laptop over a LAN connection. I've looked into Xdmx/dmx, but the project seems to ...
10
votes
2answers
10k views

Slow shutdown due to modemmanager and .. nm-dispatcher.action?

My ubuntu is slow to shutdown, and the culprits seem to be modemmanager and something called nm-dispatcher.action. On shutdown I get a message on the terminal saying something like "asking all ...
10
votes
2answers
407 views

Is it possible to store user's home directories remotely?

I work in a small office with 6 PCs and a server. I'm looking at installing Ubuntu on all of the computers, but I'd like users to be able to log in to any one of the computers and be able to access ...
10
votes
5answers
9k views

Transmission won't connect to any peers

After my upgrade from Ubuntu 12.04 LTS to 12.10, Transmission won't download from an anti-leech tracker (ALT). If I download a torrent via Magnet Link, everything works fine, but if I download from ...
10
votes
1answer
18k views

How can I make VirtualBox guests share the host's VPN connection?

Question When I start my VPN on my ubuntu desktop computer which acts as a router, the attached subnet loses internet connectivity, but is still accessible (LAN). Ideally, I would like to know how to ...
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 ...
10
votes
2answers
1k views

How to stop Network Manager from continually prompting for wireless password

How do you prevent Network Manager from continually prompting for wireless password when it tries to reconnect after the connection temporarily drops? Unlike this post, this happens for me without ...
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. ...
9
votes
4answers
4k views

How to monitor bandwidth usage?

I am using Ubuntu 14.04. My internet connection is pretty slow (512 kbps). Sometimes I see that I have no software running which should download anything from the internet, but the system monitor ...
9
votes
3answers
7k views

Windows hostnames are not resolved

I know that similar questions has already been asked. However, as suggested in the answers to that question I have the winbind package installed and have wins in /etc/nsswitch.conf: hosts: ...
9
votes
5answers
8k views

Network connection error after suspend Ubuntu 14.04 [duplicate]

I'm using ubuntu 14.04 and a DSL connection for internet. However, whenever I suspend and resume my session, I'm no longer able to connect to the internet. Could someone help me fix this?
9
votes
4answers
6k views

Name resolution on home LAN?

Is there an easy way to allow my other computers to resolve my hostname over the network without having them edit their hosts files or their DNS settings? Some of the computers are on Windows.
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 ...
9
votes
4answers
28k views

How to uninstall teamviewer 7 — package doesn't appear in the software center

I previously installed teamviewer 7 on my Ubuntu 12.04 32-bit system. However, now I'd like to uninstall it, and I don't see an easy way to do it. Normally, I'd look in the Ubuntu software center, ...
9
votes
5answers
20k views

Why is the /etc/hosts file not working?

I have been having problems with this for a while and have tried everything I know, so I figured it was finally time to ask for some help. Any edit I make to /etc/hosts just doesn't work. Example: ...
9
votes
2answers
5k views

How do i find out which program is using internet and how much? [duplicate]

Possible Duplicate: How do I find out which process is eating up my bandwidth? Sometimes there are unusual Internet activity in my Computer. Modem's lights are always blinking and When I ...