Managing and using network connectivity on a Ubuntu system

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5answers
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How do I connect my desktop and my laptop using an ethernet cable to transfer files?

I have an ethernet cable (not a crossover cable) to connect my laptop and my desktop ubuntu machines. I want to transfer large amounts of data. Is it possible with such a cable? I believe that between ...
7
votes
2answers
16k views

How Can I Roll Back a Kernel Update?

An update for Ubuntu was available today and it installed the generic kernel 2.6.38.11.26. After doing so networking is no longer functioning correctly. My Acer Aspire 4520 has an Nvidia Network card ...
6
votes
3answers
5k views

How to configure a LAN connection between two Ubuntu machines?

I have installed Ubuntu on two of my desktops PC's. I have not installed any addon packages or anything related to network as yet. Please guide my on how to set up a LAN between these two machines. ...
6
votes
6answers
2k views

Uploading or attaching files that located on a shared drive doesn't work?

I have this odd, quite minor, but annoying issue that I am quite perplexed about. Whenever I try to upload a file via my browser(let's say attach a file to an email in GMail), I click 'Browse' button ...
5
votes
2answers
11k views

How do I setup an LXC guest so that it gets a dhcp address so I can access it on my network?

I setup LXC using: lxc-create -t ubuntu -n lxcguest1 But I can't access any services running on it from my LAN, it appears to be NATed. How do I set it up so that I can access it (it probably ...
5
votes
2answers
16k views

Ubuntu 12.10 - network manager not listing wireless networks

Just recently reinstalled Ubuntu 12.10 on my laptop (dual-boot with Windows 7). Had no problem accessing my home wireless network until today. All of a sudden, the network manager doesn't seem to be ...
5
votes
1answer
6k views

How to limit internet speed?

I have 3 accounts in my pc, i would like as the admin of the pc to limit the internet speed (upload/download) for the other 2 accounts, is there a way to do this?
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votes
2answers
4k views

Cannot connect to the internet after installing Cisco AnyConnect VPN Client

Today, I tried to install the Cisco AnyConnect VPN Client on my computer running Ubuntu 12.04 updatet earlier today. I followed the instructions on this webpage ...
4
votes
3answers
2k views

Persistent 3G connection with network manager fails [closed]

I maintain a persistent 3G connection on a remote device using network manager. However, every so often, the link fails and then does not restart itself. I managed to identify an occurrence of this in ...
4
votes
1answer
17k 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 ...
4
votes
3answers
20k views

Why can I ping via IP address but not hostname?

I have a media/file server running Ubuntu 10.10 Maverick Meerkat, connected via cable directly to a DSL router, which also acts as a network switch. The router uses DHCP to dynamically assign IP ...
3
votes
1answer
13k views

How to connect to WiFi from Lubuntu?

After add the Manage Networks icon into the panel, I can see my Wi-Fi network on the list. So I click on the SSID and it prompt for a password. I enter the right or wrong password but nothing happens. ...
3
votes
1answer
1k views

Can't resolve windows domains in local network

I've installed ubuntu on my computer at work because I think it is a perfect system for work which I do but I got some issues. I can't resolve domains from windows DNS server. Basically, we have two ...
3
votes
3answers
689 views

How do I run a simple Zenity script after disconnecting from WiFi?

I am running Kubuntu 12.10 64bit. I am trying to get a bash script to execute when I am disconnected from the network. I created a file in the folder /etc/network/if-down.d/ called test which has a ...
2
votes
1answer
49 views

How to specify what network to connect to automatically?

I'm on Xubuntu 13.10, I can connect to two different networks, x and y, I have passwords to both network and I can switch between them at will. When Xubuntu starts, it automatically connect to y, I ...
2
votes
1answer
447 views

BCM4313 eats up all the wifi

I have a problem similar to this : While using internet on ubuntu, all other computers get bad internet connection So the problem is, whenever I log onto Ubuntu Internet, all other computers Internet ...
2
votes
3answers
4k views

In Wired Connection settings save option is getting grayed out

Each time I switch to manual configuration, of wired connection in Ubuntu 12.10, the save button gets grayed out. As soon as I start setting it in Manually, it gets grayed out.Please help ! One ...
2
votes
3answers
1k views

How to open files from other machine running ubuntu

I tried to take data from my pc to laptop. Both are using ubuntu 11.10 os. I googled and tried to connect both the systems. Now it is showing connected symbol. Dont know how to proceed further. I need ...
2
votes
1answer
1k views

Ubuntu 12.04 - USB3 issue with mobile broadband usb sticks

I am getting a very strange problem as regards the USB3 port of my laptop under ubuntu 12.04 (My laptop is a Dell Inspiron n14z). The laptop has two USB3 ports and one USB2 port. In order to get any ...
2
votes
0answers
213 views

Networking failing on both wired and wireless connections [closed]

Running 11.10 on a Lenovo B570, maybe a month old. When I try to connect to a network, wired or wireless, nm-applet does its normal "connecting" animation, but sort of "spasming" at the end of the ...
2
votes
5answers
4k views

How to block, deny or redirect an IP address or website domain

This question popped a couple of days ago and it is: How to block, deny or redirect an IP address or domain name to another IP or web domain without the use of a router or configuring a browser. ...
2
votes
2answers
3k views

How to setup a local network over the CAT5 cable?

I use Wifi to connect to the internet, and want to interconnect the two machines I am using so that it is easy to transfer files I can copy from one machine and use the same buffer on another ...
1
vote
1answer
79 views

Ubuntu UI Toolkit's interaction with my device fails due to SSH protocol capabilities mismatch

Testing my device's (nexus 4 running latest from devel-prosed) connection from SDK->Options->Devices->Test I get: Connecting to host... SSH connection failure: SSH Protocol error: Server and client ...
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
3answers
6k views

apt-get doesn't work behind a proxy

My company uses an HTTP proxy and our various Ubuntu 12.04 servers therefore need to be configured properly, namely by setting \etc\apt\apt.conf.d\80proxy to: Acquire::http::Proxy ...
1
vote
3answers
8k views

How to use Airtel 4G LTE Dongle with Ubuntu?

I have recently installed Ubuntu 13.04 in my PC. Everything works fine except my Airtel 4G LTE dongle (Model MF825A). Ubuntu does not give any option to select 4G LTE when setting up a mobile ...
1
vote
2answers
3k views

Unable to add nodes to MAAS Server running in VirtualBox

I have followed the tutorials here and here . My MAAS master server (running Ubuntu 12.04 server) is already set up in a VirtualBox VM. I have not installed DHCP on this server as I already have a ...
1
vote
3answers
8k views

No Wireless connectivity after installing Ubuntu 12.10 on Windows 8

I am new to Ubuntu/Linux. I have installed the Ubuntu 12.10 version on Windows 8. After installation, there is no wireless connectivity. I have searched the forums and tried things that have worked ...
1
vote
5answers
7k views

Ubuntu 11.10 network speed [closed]

Just upgraded to 11.10 from 11.04 . My internet speed is VERY slow now. I did a speed test with two similar laptops. The one running windows has a download speed of 14Mb/s while the one running Ubuntu ...
0
votes
1answer
188 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 ...
0
votes
3answers
12k views

How to change the MAC address of pc? [duplicate]

I am currently using ubuntu 13.04 along With windows 7. But I want to change my MAC address of pc. Is there any way to change it.
0
votes
1answer
1k views

Bypass Authenticated HTTP Proxy :Ubuntu

Is there any way to bypass authenticated http proxy to something like 127.0.0.1:port, so that we could use it any application, simply by filling out the proxy 127.0.0.1:port (which could be used for ...
0
votes
4answers
11k views

Qualcomm Atheros AR8172 Driver fix? (lenovo g500s)

Recently I took a lenovo g500s laptop. the product id is LENOVO_MT_20245. after the installation, it could not recognize LAN network adapter. After googling I found out that it has a Qualcomm Atheros ...
0
votes
5answers
9k views

Can't connect to wireless on a Dell Latitude 620

I have just installed Ubuntu 11.10 on a Dell 620 Latitude. I am new to Linux and am not very techie. I cannot see how to connect to a wireless network. For the avoidance of doubt I cannot 'see' any ...
9
votes
1answer
3k views

What user-friendly VPN software is available?

Other than the Network Manager applet at the Natty panel, is there any other user-friendly VPN tool available. One which has a GUI and can be easily setup. Ref. question : ConnMan not detecting ...
6
votes
1answer
1k views

Disable internet connection from terminal!

The connect automatically option is allowed for my wired "Wired connection 1". Disconnecting the connection works when I do it from the panel's Network -> Disconnect menu. But when I do that with ...
6
votes
3answers
1k views

Network bonding isn't working correctly

Hey guys I'm having trouble setting up Ubuntu Bonding, following this guide. My interfaces file looks like this: auto eth0 iface eth0 inet manual bond-master bond0 auto eth1 iface eth1 inet ...
5
votes
3answers
5k views

Check if IP is static or dynamic programmatically

I'm trying to determine whether my IP has been statically or dynamically assigned in Ubuntu 11.04 from within C. The closest I've come is examining /var/lib/dhcp/dhclient.leases, but that doesn't ...
5
votes
2answers
71k views

How to configure eth0 manually?

How to manually configure eth0 in Ubuntu? I don't have any DHCP server. Do I need IP address when I am just going to capture packets?
5
votes
1answer
2k views

DSL PPPoE connection not working?

I use a wired PPPoE connection to connect to the Internet. What I need to do on Windows to connect to it is put in static IP address, gateway, subnet mask and DNS servers for my LAN card. Next I have ...
4
votes
2answers
126 views

FTP to my Ubuntu machine kills my network

I'm having a problem transferring files between my Ubuntu server and other machines with FTP. Basically, if I initiate an FTP request from my Ubuntu to my Mac, it works fine. But if I make a request ...
4
votes
2answers
5k views

Server error (-5 - No address associated with hostname)

This seems to be a common problem with 12.04. I've done the searches and found various and sundry replies, but I've yet to find a solution to my situation. I've installed 12.04 32bit on a server box ...
4
votes
6answers
25k views

Wireless Connected But No Internet Connection (Ubuntu 12.04)

I am using same network for 2 days and everything was normal. However, today even though it shows me as connected to the network, I do not have internet connection. If I use ethernet cable instead of ...
3
votes
1answer
7k views

How to install Netgear N-300 UAB adapter WNA3100 on Ubuntu 12.04

After a fresh install of Ubuntu 12.04, the first thing I'm trying to do, is to setup my wireless adapter. I can see it using lsusb: beer@beer-linux:~$ lsusb ... Bus 002 Device 006: ID 0846:9020 ...
3
votes
1answer
2k views

UDP tuning ubuntu - how to?

I'm having some lags with my server running Ubuntu 10.04 on my UDP packets. What should I do to change the settings set for the UDP packets? I think the problem is there. On my ...
2
votes
1answer
1k views

Asus X550L Weak Wifi signal ubuntu 14.04

I'm new to Ubuntu OS. I've installed ubuntu 14.04 x64 on my ASUS X550LC laptop yesterday. The wifi signal is weak & getting disconnected sometimes. Searched all over the web but many site/forums ...
2
votes
2answers
847 views

Wireless doesn't reconnect after resuming on after the upgrade to Ubuntu 14.04 on my MacBook Pro.

I have a MacBook Pro with it dual-booting with Ubuntu 14.04 and Mac OS X, and a few days ago I upgraded Ubuntu from 13.10 to 14.04. When I suspend and then resume the system, wireless tries to ...
2
votes
1answer
426 views

No wlan after standby

since I use Ubuntu 13.10, I'm experiencing a bug: I activate standby I press any key to continue working on my laptop The computer is on again, but the wlan doesn't work. → The wlan network ...
2
votes
2answers
741 views

Ubuntu 12.10 Network Connection menu GUI doesnt work properly

Many a times I have seen When I click on network connection(besides volume icon), I am unable to select any options. When I hover over VPN connections, the list shows nothing. I have added many VPNs. ...
2
votes
2answers
4k views

How to forward an Internet connection to another network?

Can somebody please make a short & sweet tutorial telling how to forward an Internet connection to different network interfaces in Ubuntu...? This is the idea: I'm using a 3G usb modem to get ...