Managing and using network connectivity on a Ubuntu system

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13
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2answers
7k 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 ...
13
votes
3answers
32k views

Proxy exceptions in 12.04 LTS

How do I setup proxy exceptions under Ubuntu 12.04? Already tried the proposed solutions for earlier Ubuntu versions and none seem to work. There is no Network Proxy Preferences in 12.04 AFAIK. ...
7
votes
1answer
19k views

MySQL server not accessible from remote machine

I have installed MySQL server in my local Ubuntu server (11.10). I can't connect to the server from a remote machine. When I tried:- nmap localhost , It shows the following PORT STATE SERVICE ...
6
votes
1answer
4k views

ubuntu server: wifi

I just installed Ubuntu 14.04 server on my computer that has both a wired network port and a wifi card. I would like for the server to use the wired network if is not available, and use wifi when it ...
5
votes
1answer
5k views

Trouble Installing 12.10 on a GA-990FXA-UD3 Base Machine: Network and USB Don't Work

I've spent two days pulling my hair out trying to get Ubuntu to install correctly on a new machine I built using a Gigabyte GA-990FXA-UD3 motherboard. Ubuntu seems to install fine, however, neither ...
5
votes
2answers
22k 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 ...
4
votes
1answer
3k views

Why is my network interface named enp0s25 instead of eth0?

A lot of my scripts stopped working after installing Ubuntu 15.10 and I have trouble remembering this new name as I was used to ethx and wlanx for years. Is there a reason for this change? Do I have ...
4
votes
3answers
11k views

Is there a way to get Broadcom 802.11ac WiFi (43b1) working on Ubuntu 12.10?

I have a dual boot of Windows 8 / Ubuntu 12.10 on an ASUS G75VX with Broadcom 802.11ac Network adapter device 43b1. It seems that there exists no drivers for this adapter. I have done all of the ...
4
votes
1answer
5k views

sharing internet between network interfaces

I have a laptop with lubuntu 11 with two network interfaces, wireless and wired. Wireless interface connects to the router with DHCP and provides access to the internet. The wired interface has a ...
3
votes
3answers
6k views

Issues installing wireless network driver

I recently did a full install of Ubuntu 13.04, well my Asus PCE-N15 (which seems to have a common issue in Ubuntu) seems to be functioning horribly. In system monitor it fluctuates from about ...
2
votes
2answers
6k views

Can't connect to specific wifi network

I'm using Ubuntu 12.10 and I can't connect to a specific password-protected wifi network. I have the password and I can connect to it with success in the same laptop with Windows 8. I can connect to ...
10
votes
6answers
24k views

What are the alternatives to Network Manager for wireless?

I was wondering if there are any GUI alternatives to the Network Manager. It seems, I always run into problems with it (unstable connections, wrong icon shown, wrong notifications, etc.).
8
votes
2answers
940 views

Why can I not access imgur.com and gravatar.com from Ubuntu but can do so from Windows?

I have this strange problem, I am unable to access imgur.com from Ubuntu ! I have checked the /etc/hosts file, there seems to no entry related to imgur. I can access it from Windows(same connection). ...
8
votes
4answers
1k views

How can I share files over a Windows network?

I have a media computer which I recently reformatted to Ubuntu 10.04. I am probably just missing something obvious but I can't figure out how to share folders and files, so that I can browse to them ...
6
votes
2answers
10k views

Sharing Printer with CUPS

I'm on Ubuntu server 10.10 and I need to connect a HP Laserjet printer via USB and share it to the LAN. I followed some tutorial on the internet to install the HPLIP drivers and configuring CUPS. I ...
3
votes
4answers
19k views

Ubuntu 14.04 : My computer sees the wireless network, but won't connect to it, keeps asking for the WPA password

Specs: Computer: Sony Vaio VGN-NW240F Wifi card: Network controller: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) (rev 01) More information (lspci -vv -s): Subsystem: Foxconn ...
3
votes
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
15k 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
4answers
14k 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
2answers
239 views

Killer Ethernet 2400: no wired internet

I have a Z170 Gaming K6 motherboard with a killer ethernet 2400. I have just installed Ubuntu but I'm not getting any internet even though I connected it with a wired connection to my router. I have ...
1
vote
1answer
1k 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
783 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
15k 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 ...
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
7k 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
votes
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
512 views

Specific traffic analysis

In the recent days, my traffic increased rapidly. How can I check which application is responsible for that?
3
votes
4answers
738 views

Wifi doesn't work after suspend after 16.04 upgrade

This particular version of the "doesn't work after suspend" came after upgrading to 16.04. It seems that the upgrade includes a Wicd applet (added to Metacity Classic Gnome task bar alongside regular ...
3
votes
3answers
15k 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
375 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
366 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
vote
0answers
112 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
vote
2answers
8k 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
475 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
378 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
134 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 ...
117
votes
6answers
208k 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] ...
40
votes
9answers
52k 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 ...
38
votes
10answers
87k 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 ...
33
votes
6answers
107k 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 ...