NetworkManager is a set of co-operative tools that make networking simple and straightforward.

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Can't connect with WIFI through nm-applet

I installed Ubuntu Server 14.04 with i3 on my laptop. The reason why I chose for the Server edition is because I wanted a minimal configuration. Additionally, I installed network-manager to help ...
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2answers
1k views

Connect button grayed out in 802.1x authentication dialog

Since I upgraded to 15.04 I can't connect to our office wired network anymore since I can't press connect in the authentication dialog.
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2answers
713 views

How can I update a Network Manager connection from the command line?

I have a bunch of Ubuntu machines on my work ethernet LAN and I need to modify the default gateway. I'd rather not traipse round, interrupt people's work, to right click an applet, preferring instead ...
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2answers
4k views

DSL connection problem after installing Ubuntu 15.04

I have just installed Ubuntu 15.04. I tried to connect with my broadband DSL connection. When I entered the cable it was showing that it could recognize the cable. Then from edit connection I added a ...
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0answers
115 views

WiFi and Lan Network is not working - Ubuntu 12.04

I have a problem with my network connection. I have been using the same laptop with Ubuntu for more than a year, and suddenly yesterday all the connections stopped working (both wireless and wired). ...
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3answers
6k views

Ubuntu 15.04 network manager causing slow boot

Since upgrading from 14.10 to 15.04 a few days ago the boot time, grub OS screen to login screen, has increased from 12 seconds to about 40. This is my systemd-analyze critical-chain output: The time ...
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3answers
2k views

No WiFi on a system76 laptop after upgrade to 15.04

I just upgraded System76 Gazelle laptop to 15.04 and wifi no longer works. It sees many networks and tries to connect to mine, but fails repeatedly (/var/log/syslog seems to indicate authentication ...
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2answers
750 views

Can't get online after installing Lubuntu 15.04

I upgraded to Lubuntu 15.04 yesterday. I originally installed Lubuntu at school several months back, so it was done using the school's Ethernet connection. At home, I set up my own DSL connection, ...
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1answer
224 views

ubuntu 12.04 File Permissions or owner were insecure

Let me explain a little bit about what i am trying to do, i am trying to manage Network Manager files via a non root user and i keep getting the error message that says: keyfile: updating ...
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3answers
167 views

DNS not working after upgrade from 12.04 to 14.04

I've recently upgraded my desktop from 12.04 to 14.04 and now my internet connection isn't working. I can access my router. I can go to Google by entering its IP address. My resolv.conf file: ...
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1answer
177 views

dnsmasq disabled on Network Manager

When I first started using Ubuntu, it would always use dnsmasq. I mean when I would enter $ nslookup www.bing.com The result would come from 127.0.0.1. But after installing and configuring ...
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0answers
126 views

Activating VPN fails always after temporary loss of internet connection

I have a few correctly set up VPN connections and use them frequently with nmcli. This works most times, but occasionally I can't connect any more with none of my saved VPNs: ...
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1answer
179 views

Xubuntu - missing checkbox “connect VPN automatically”

I'm trying to make my VPN connect automatically (on startup or when I got disconnected from Wifi) and most of users have a checkbox directly in network-manager. I don't. I thought I have old ...
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1answer
33 views

How to broadcast a folder in network of class B network?

I want my specific folder on every pc which is in common network of my college so how to broadcast that folder is there any command like ssh? please help me fast.
2
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1answer
154 views

Unable to set proper routing between two networks

Three boxes running three different ubuntu flavours (14.04, 14.10, 15.04). I'm trying to get all of these to talk between themselves, while being on different subnets, and I can't figure how, yet. ...
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1answer
75 views

Where does Network Manager write connection settings for eth0?

In Ubuntu I have configured network through network manager. Every thing is working fine.My machine is pinging self machine as well as remote machine. but file /etc/network/interfaces doesn't contain ...
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1answer
92 views

Ubuntu 14.04 ethernet connection using graphical network manager

I am trying to connect Ubuntu 14.04 to the internet with an ethernet cable. I have turned wireless off. The cable works off a Windows laptop that I am using now. When I plug in the cable 'wired ...
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1answer
403 views

Ubuntu linking two wireless networks and sharing internet connexion

I must at first say that I'm a total noob regarding networking. I have two wifi adapters (wlan0 and wlan1). wlan0 is connected to a wireless router that is not connected to internet. wlan1 (a long ...
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1answer
195 views

Issue with gnome-connection-manager

I use Ubuntu 14.04 with gnome-connection-manager. Everything worked well, but then gnome-connection-manager crashed and now I can't start it. The process is not running and a reboot did not help. ...
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1answer
5k views

Have internet connection but can't ping External sites

I have an Internet connection and can browse, but I can't ping the google DNS, ping 8.8.8.8 nor can I ping google.com Any ideas why this might occur?
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1answer
294 views

KDE Network Manager Notification Options Not Available

KDE Network Manager is suppose to have notification options for Connection Activated or Deactivated are missing here. I am on Kubuntu 14.04 LTS fully updated. You can see in the picture that some of ...
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0answers
146 views

Implement Catch-all HTTP Server using DNSMASQ

Ubuntu 14.04 | dnsmasq My goal is to setup a catch-all HTTP server using an Ubuntu 14.04 workstation as DNS resolver. I have installed dnsmasq on my Ubuntu 14.04 OS using apt-get install dnsmasq and ...
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1answer
162 views

How to block access to all SSIDs except for a preferred SSID

I work in an enterprise environment and I need to block access in Ubuntu 14.04 to any unapproved SSID in a lab setup. The client only wants users in the lab to be able to access one specific SSID and ...
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3answers
90 views

Ubuntu Network manager

I uninstalled network-manager from my Ubuntu-gnome, so I don't have internet connection. How can I reistall it.
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2answers
263 views

Wireless randomly disconnects from time to time

For some reason, my laptop's wireless connection randomly disconnects from time to time. It may suddenly disconnect when I'm editing a Google Docs file, when I'm cleaning my files or when I've walked ...
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0answers
19 views

how to change my network configuration files to fix “failed to fetch” error [duplicate]

I'm very new to linux, and every time I try to sudo apt-get something, it gives me the error described in this forum: A "failed to fetch" error occurs when apt-get update is run. How do I ...
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1answer
638 views

14.04 - Unable to connect Windows PPTP VPN

I am trying to connect a Windows PPTP VPN. I created VPN connection through the Network configuration in the Settings. I configured VPN credentials such as gateway, username and password. Nothing ...
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1answer
231 views

VPN Not working, PPtP

today I was trying to set up a VPN. I have all the credentials and everything entered, but every time I try to connect, it says this. Here are the pictures for the steps I take to recreate this ...
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1answer
236 views

arp-scan command displays (Unknown)

this command sudo arp-scan --interface=wlan0 --localnet display the following results: 192.168.1.1 *:*:*:*:*:* D-Link Corporation 192.168.1.101 *:*:*:*:*:* (Unknown) why i can't see the name ...
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0answers
295 views

Noob user. No network (wired). Cannot ping router

Let me start by saying I am pretty new to Linux, so forgive my unavoidable noobness and thank you for readning this. I am trying to set up a good environment to learn programming and familiarize ...
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5answers
75 views

Disable every network permanently

I have Ubuntu installed on an USB device, I need the system isolated from any network (LAN, wifi, bluetooth, etc.) permanently. I read a lot of suggestions but some are user-related, other disable ...
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1answer
46 views

A new connection is generated instead of using the new settings

I am trying to set up a static IP address using the nm-connection-editor tool. I select the currently-used wireless network, click edit, go to "IPV4 Settings", click add, enter a valid IP address, ...
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2answers
728 views

etc/network/interface empty no internet connection

My internet connection has gone suddenly and I find my /etc/network/interfaces is completely empty, I can't ping my router and ifconfig for eth0 shows no ip address or broadcast address, I tried ...
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0answers
42 views

Where is created Wifi hotspots located?

I use my small homeserver as Wifi hotspot. Usually I just use the ad hoc "internet sharing" hotspot feature in NetworkManager. Today I created a new Hotspot, without password, because I needed it for ...
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1answer
717 views

/run/network/ifstate keeps getting reset on reboot

I find that my /run/network/ifstate file keeps getting overwritten on boot. On this session I'd edit it to $ cat /run/network/ifstate lo=lo wlan0=wlan0 eth0=eth0 But on next session (after a ...
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0answers
1k views

Error: “The system network services are not compatible with this version.”

I've been using Ubuntu 14.04 since 3-4 weeks now, and I suddenly encountered this error upon starting my computer today. It should be noted that the internet works, but I am unable to see the Wifi ...
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2answers
999 views

Laptop can't find my home wifi network

The laptop has Ubuntu 14.04, it shows neighbors networks and it was working fine before. My phone and desktop connect to my home Wi-Fi with no problems. This has happened a few times before but in ...
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1answer
50 views

Run command when ethernet is disconnected

Is there a way to execute a command in ubuntu when an ethernet cable is disconnected/connected? There's a notification when a cable is plugged in or removed, so I assume there is some way to do this.
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0answers
121 views

Is it normal that network-manager manages virbr0? [closed]

I recently upgraded to vivid (I know it's still WIP), and have found that network-manager shows an interface virbr0 as Connected. virbr0 is an interface added by libvirt to handle networking ...
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2answers
2k views

How to connect to a VPN without using Unity network manager?

I have set up a VPN connection back when I used Unity instead of XFCE as DE for my Ubuntu 14.10. It worked well, but I can't find how I have to connect to it now under XFCE. Is there e.g. a panel ...
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votes
3answers
5k views

How to disable wireless from command line

How do you disable the wireless Internet from the command line? I tried sudo ifconfig eth1 down but network-manager seems to ignore this and keeps trying to reactivate it. What's worse is the ...
2
votes
2answers
1k views

nm-applet gives errors

nm-applet always gives me a hard time when connecting to wireless. I often have to restart it and make several attempts till it connects to a network. Sometimes even restarting the computer doesn't ...
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1answer
574 views

wlan1 interface disappeared from ifconfig

I was trying to make a virtual interface on my wlan1 card (like set hostednetwork from windows) by editing /etc/network/interfaces: auto wlan1:0 iface wlan1:0 inet static address 192.168.4.1 netmask ...
3
votes
3answers
4k views

Wifi stop working after while on Ubuntu 14.04.2

Yesterday I bought new laptop Lenovo E540 and I installed here Ubuntu 14.04.2. But I've problem with my wifi (router is Dlink g version). I can connect to wifi without problems after turning on ...
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1answer
2k views

What is Network-manager trying to do with rdisc?

I have quite strict firewall setup using (g)ufw, allowing only some known to be useful outgoing traffic and denying the rest. I have noticed these recurring messages in syslog, and I'm wondering what ...
0
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2answers
387 views

Internet does not work over wired connection after removing pppoe configs

Internet over router using ethernet cable worked fine before I did any manipulation with PPPoE on my computer. After configuring PPPoE and testing some things I had to rollback configurations added ...
0
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1answer
165 views

Wifi struggles mightily to connect, initially

I get reams and reams of this, then something catches, and I'm fine. This is Ubuntu 14.04.2 LTS lspci output: 01:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01) ...
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1answer
128 views

Ubuntu installed on MAC has ethernet and WIFI problem

I have problems with my Internet connection and interfaces. I will give those info below to help and explain my problems. 1- Ethernet (cable): Internet works through cable but only if I boot ...
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1answer
74 views

How can I get a Wi-Fi network support after he cut the connection. can not connect to the network again until restar I have kubuntu 14,04

How can I get a Wi-Fi network support after he cut the connection. Because when it starts laptop it normal after 3 or 4 minutes to work the network connection stays stopped for a few minutes and then ...
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2answers
272 views

multiple Ip's bind on same port

I run multiple game servers so i added my additional ip's to the server. I made sure that the game servers ip are different but I still cant start the others server cause the ports are conflicting. $ ...