Managing and using network connectivity on a Ubuntu system

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3
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1answer
3k 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
14k views

How to install network-manager without internet access?

I have been trying to install some kind of network indicator to show my current bandwidth usage on the panel on top of the screen so I decided to install ...
2
votes
1answer
205 views

Ethernet Network card BCM4401-B0 no longer recognised?

I updated Ubuntu to 14.04 LTS and I can no longer see my network - No network devices available shows in the network drop down menu. Networking is enabled and if I choose to boot my Dell Inspiron 1300 ...
1
vote
1answer
523 views

No wireless connection on HP Pavilion x360 Convertible

I installed Ubuntu on my new laptop, and I have problems with the wireless connection. I noticed that I wasn't able to connect to Wi-Fi since I started to install the OS, although on Windows 8.1 ...
1
vote
2answers
586 views

Wifi problem after upgrade 14.10 to 15.04

After upgrade from Ubuntu 14.10 to 15.04 i have some problem with my wifi. I don't see option with wireless network on menu bar. There is report from wireless-info script wirelees-info: 1) ...
0
votes
1answer
4k views

kernel: wlan0: deauthenticating from x by local choice (reason=3)

My wifi card worked fine earlier today. Now it does not work anymore. I also tried using an external USB wifi card and I got the same error: kernel: wlan0: deauthenticating from x by local choice ...
0
votes
4answers
14k 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 ...
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votes
0answers
74 views

A posibble solution for Lenovo users with Realtek wireless card to solve their Wi-Fi issues

My system - Lenovo G50-45 with Realtek RTL8723BE wireless card. My wireless card details My skills - I'm new to Ubuntu. Dual booted Ubuntu 14.04 LTS along with Windows 10 on 28th of January, 2016. ...
7
votes
1answer
2k views

Can't get BCM4331 wireless working right

I have Ubuntu 12.10 on my Macbook Pro, which has BCM4331 for wifi. It's been working fairly well, except I've been having a problem that the connection will randomly stop working. Ubuntu still says ...
5
votes
1answer
5k views

Network eth0 DHCP, static ip and autonegotiation issues

Background I am running an Ubuntu Server on 14.04 which is currently up-to-date. I have only one network device connected to it. When I use my Ethernet cord and connect it from the wall to my laptop ...
4
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0answers
12k views

How to set a static IP address? [duplicate]

apt-get fail to resolve the mirror. I am using my server as a backup server to one of my website servers. So I had to initially set a static IP address... How can I do it?
4
votes
4answers
496 views

Specific traffic analysis

In the recent days, my traffic increased rapidly. How can I check which application is responsible for that?
3
votes
3answers
11k views

How to get Wifi working on Ubuntu 14.04 (Macbook Pro Retina 15 inch - 2014)

I just downloaded Ubuntu 14.04 on my Macbook Pro Retina 15 inch 2014 version using usb. My problem is I can't get the Wifi working. No wifi connections would display on the wifi menu. I've tried ...
3
votes
5answers
7k views

Kubuntu 13.10 Wifi doesn't work - DHCP timeout

I have a Realtek RTL8188CE 802.11b/g/n WiFi adapter in my computer. Today I upgraded to 13.10 and I can't connect. Before upgrading WiFi worked just fine. I can see WiFi networks, but it just gives ...
3
votes
1answer
8k 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
3answers
2k views

How can I connect to the Internet using an ADSL modem?

I have a dualboot Ubuntu and Windows XP on my PC. Does Ubuntu require drivers for the onboard Ethernet card? If not, how can I make an Internet conection using an ADSL modem?
2
votes
1answer
3k views

Internet disconnects by itself and never reconnects unless system restarted

I am using Ubuntu 13.10 and a wireless internet from a modem "Reliance Netconnect" for the internet. I've installed Ubuntu two days back along with my Windows system. So here's a detailed summary of ...
2
votes
1answer
2k views

How to prevent WLAN connection from dropping permanently on a Fritz USB WLAN N stick?

I have a desktop with a Fritz USB WLAN N stick and tried Ubuntu 12.04. Installation went fine and WLAN is working. However, connection drops permanent. Reconnecting manually fixes it but after a few ...
2
votes
3answers
11k views

How can I install the Realtek RTL8111E version 8168 driver?

I downloaded and extracted the latest Linux driver version from Realtek. I read the readme file and it instructed me to run ./autorun.sh as root. I did that. It compiled the driver for my kernel, ...
2
votes
3answers
7k views

How do I get an Atheros AR9285 working?

I've just decided to jump into the world of Ubuntu, so far I encountered no problems until I tried to connect to my wireless network. I'm running Ubuntu on my laptop, Acer Aspire 5333-2880, which has ...
1
vote
1answer
328 views

14.04--Routine update killed network-manager, unable to connect to any networks [duplicate]

I am running 14.04 LTS on a Dell XPS 13 9343. Today I did a routine update through Software Updater and restarted when it prompted me. When I logged back in I had no internet connection and no icon ...
1
vote
1answer
269 views

Wireless Disconnects Intermittently with Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] [8086:0085] (rev 34)

I am on Ubuntu 15.04 using xfce (xubuntu) and am having trouble with my wi-fi. The indicator continues to show that I am connected to the network but after some amount of time I will no longer have ...
1
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0answers
102 views

Wireless automatic disconnected

04-22-2015 My internal wireless adapter become disabled (the wireless led indicator isn't lighted), when I mount my laptop on a laptop table from my desk. Restart Ubuntu is the only solution I know ...
1
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2answers
6k views

How to increase JAVA Heap Size?

I need to increase the default java heap size to get OpenNMS Linkd service running smoothly, and fortunately I have 4/5 of my total installed memory free at any given time even when their is maximum ...
1
vote
1answer
2k views

How can I adjust internet settings such as TTL, Rwin, and Max Connections?

Is it possible to adjust settings such as TTL, Rwin, and Max Connections on Ubuntu? I am having connectivity issues on Ubuntu with my wireless card. I experience the same issue on Windows XP, at least ...
0
votes
2answers
244 views

No network after upgrade to 14.04.3 LTS

I upgraded my server to 14.04.3 LTS by doing "sudo do-release-upgrade". It all seemed to work fine, but after rebooting I have no network at all. I can't find the computers on my LAN or anything on ...
0
votes
1answer
235 views

How to rotate WiFi connections?

I have 2 WiFI connections available. Sometimes, the WiFi network disconnects, and when that happens, I'd like the system to automatically use the other connection. How can I do this in Ubuntu?
0
votes
2answers
127 views

Wireless connection is very slow

I installed Kubuntu on my new HP-15 laptop that I just got. Initially the wireless connection was working well, but about two days ago I noticed a decline in the speed of the wireless connection. When ...
0
votes
2answers
1k views

I messed up my /etc/hosts and /etc/resolv.conf files, now my network doesn't work. How can I reset it?

I tweaked my system by installing ftp server and a dns server. I think in the process I messed up resolv.conf and the hosts file. Now I want to restore it but am not able to do so. I am using ...
105
votes
6answers
181k views

How to know what program is listening on a given port?

I suspect a program is listening on port 8000 on my machine. When I run the following command, I get that error: > python -m SimpleHTTPServer # Lots of python error socket.error: [Errno 98] ...
39
votes
9answers
45k views

What's the best way to SSH to machines on the local network?

I have 2 computers, one that I use and one for the kids. I want to be able to ssh into their computer to control it (like to shut it down etc) but am curious the best way to do this. We both are in ...
37
votes
10answers
81k views

What is the correct way to restart udev?

I've changed the name of my eth1 interface to eth0. How to ask udev now to re-read the config? service udev restart and udevadm control --reload-rules don't help. So is there any valid way ...
31
votes
6answers
97k views

How to see all computers connected to a network

I am in a LAN and there are 3 Ubuntu, 2 Kubuntu, 2 Windows XP and 2 Windows 7. What commands or tools are available to see what PCs are connected to the LAN that it shows the name of the PC and the ...
61
votes
4answers
102k views

What is the equivalent of the “tracert” DOS command?

tracert is a command in MS-DOS command prompt to trace the route to an IP Address. Is there any command in the Gnome Terminal equivalent to this?
27
votes
4answers
79k views

How to find all the used IP addresses on a network

In my work there is a lot of computer and I want make a joke. I can close computer over the network but finding IP addresses is hard to me. How can I easily find all online IP adresses from ...
19
votes
3answers
43k views

How do I access Ubuntu server running in VirtualBox from outside

I have installed Ubuntu Server 12.04 LTS on my laptop via VirtualBox. I have installed LAMP, OpenSSH, Mail server. As I logged in, I ran ifconfig. It gave me the inet address as 192.168.0.3. So, ...
15
votes
5answers
14k 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?
11
votes
3answers
7k views

How to monitor, who is pinging me?

Is there a way to know who is pinging my PC on my network. Is it possible to monitor all ICMP packets , how can i do that ?
10
votes
3answers
9k views

Transmission daemon over OpenVPN (on a BeagleBoard ARM SBC)

I have recently acquired a BeagleBone Black, onto which I've installed Ubuntu using this method. It has all worked so far. I want to use my BeagleBone as a torrent box, but I don't want to do it ...
24
votes
2answers
48k views

How to use host names rather than ip addresses on home network?

I've a small home network up and running and managed to set up ssh. Can anyone tell me what I need to do to refer to one computer on the network from another by host name rather than IP address (which ...
17
votes
6answers
91k views

How do I find my network IP address, netmask, and gateway info?

I'm trying to make my IP address static as I hear it fixes slow browsing issues. When I click on connection information under the networking menu of the gray taskbar, it tells me about the IP ...
15
votes
3answers
114k views

Command to get the hostname of remote server using IP address

I want to get the hostname of a remote server using the IP address using my Ubuntu. In Windows we can get using NBTSTAT but this doesn't work in Linux. Does anyone know how to do that?
12
votes
1answer
168k views

Connect to WiFi network through Ubuntu terminal [duplicate]

I am using my WiFi network adapter on the laptop to connect to the internet on Ubuntu 10.04. I have tried the following steps and got the below messages on the Ubuntu terminal. Please let me know what ...
20
votes
4answers
60k views

How to disable IPv6 permanently?

How can we disable IPv6 system wide via terminal commands? I've read editing /etc/modprobe.d/aliases and replacing: alias net-pf-10 ipv6 with: alias net-pf-10 off alias ipv6 off Is this safe ...
16
votes
2answers
13k views

What does “.local” do?

I've got several Ubuntu machines on my network at home, but the DNS is provided by a windows server (2K). When I ssh to them from another , if I ssh to them as "machine" I can't connect, but if I ...
11
votes
2answers
27k 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 ...
13
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7answers
23k 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 ...
3
votes
3answers
3k views

How should I set up a Linux file server for data sharing with Windows PCs and a PS3?

I have the following pieces of hardware I would like to network mostly for file sharing (media primarily): 1 gaming laptop, 1 i7 (2.3Tb storage) desktop, 1 P4 desktop (500g storage), and 1 250gig PS3. ...
15
votes
2answers
5k views

How to configure preferred network for internet?

I am connected to a LAN network and wireless network. Both provide access to internet. Sometimes when the internet on LAN is not working, the browser simply throws an exception instead of switching ...
11
votes
4answers
15k views

Is it possible to connect to multiple VPN networks at once via Network Manager?

Is it possible to connect more VPN networks at once via Network Manager? I am running Ubuntu 12.04.1 LTS. For now I am only able to switch between preconfigured VPN connections. It`s quite annoying ...