Managing and using network connectivity on a Ubuntu system

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Turn off AP (hotspot) through terminal

How can I turn off the AP hotspot through the terminal, since when I turn it off in network settings the program crashes. Also: How do I get networking to start when the computer boots up? It doesn't ...
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57 views

I have some questions about Firewall [closed]

So I am pretty new to Linux (With the exception of Android), and being use to the old ways of Windows pretty much all I had to do for Firewall was turn it on and forget about it. However with Ubuntu ...
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1answer
44 views

IP address problem on 2nd network card

I have a network at home with multiple clients, both wired and wifi. All but one of the clients connect to the network with an IP address that is within the range that the router assigns to them. The ...
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1answer
360 views

Processes in docker cannot connect with ufw enabled

I'm trying to setup a server to use ufw with docker (via dokku.) When ufw is enabled, I cannot open connections from one container to another. When it's disabled, I can connect fine. As an example, I ...
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454 views

Only a different subnet and a virtual IP for it seems to work out to access my IP-cam

My Router IP is 192.168.1.1. DHCP-Range from 192.168.1.33 to .64 . My IP-Cam (Hikvision) is set to IP 192.168.1.100. Funny enough I can access the IP-cam only if it is on its factory default (192.0.0....
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3k views

Intel Dual Band Wireless-AC 7260 keeps dropping wifi

My wifi Intel Dual Band Wireless-AC 7260 keeps dropping wificonnection drops and the network to which I was connected disappears from the list of available networks in network manager. The only way to ...
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158 views

No internet after installing Ubuntu 14.04 on Inspiron

I have installed Ubuntu 14.04 alongside Windows XP on an old Dell Inspiron 1521. When I tried Ubuntu from the pen drive, everything was peachy. However, after installing, internet doesn't work. I've ...
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514 views

Speed up internet by multiple connections

I had made research about increasing internet speed by connection on multiple source. And i find out that ubuntu support it already. I had connect two phone; iPhone with cable and Samsung with WiFi. ...
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RDP VirtualBox Ubuntu 12.04LTS Windows 7

There are many RDP questions out there, none of the ones I've read up to now have the exact same problem. I have: A Dedicated server running Ubuntu 12.04LTS An installation of VirtualBox with two ...
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7k views

Windows needs permission from Unix User\Root to delete/move in a samba share

so my samba share requires permissions from Unix User\root to move or delete files. I don't understand why. You don't need to login to access the samba share. Just need to be on the network. The share ...
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1answer
2k views

How to setup USB wireless card as AP hotspot (tl-wn725n)

I tried to set up hotspot for my android mobile on my ubuntu 12.04. follow the instruction of here: 'http://thenewbieblog.wordpress.com/2012/05/01/wifi-hotspot-setup-on-ubuntu/' However it does not ...
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829 views

Multiple interface devices for KVM bridging

I have a server that I'm trying to virtualize with KVM. I'm trying to use a network bridge so that my KVM guests can have external IPs. Every time I create a bridge brctl addbr br0 brctl addif br0 ...
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559 views

eth0 and wlan0 not working aftre update to 14.04

I've going around lot of forums during the las few days but for the moment no solutions. After updating to 14:04 no network activity dmesg output: ADDRCONF(NETDEV_UP): wlan0: link is not ready ...
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1answer
266 views

Ubuntu goes down daily at night - VM

We have a Ubuntu VM on Hyper-V and on it we have a LAMP server installed and an internal domain accessible from the intranet . Everyday we have to restart it because the connectivity to the server ...
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3answers
1k views

ifconfig can't see USB wireless

I have a wifi USB dongle which I have previously used on a Raspberry Pi (this it is what it is target at). I am trying to get it working on an Nvidia Jetson TK1, however I am having some problems. ...
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65 views

How to test that my ubuntu is alive on network?

My question is , how to check that my ubuntu desktop is alive , if ping is disabled in firewall . What Methods help me to figure out the status of my Ubuntu ?
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43 views

How do I set up a small Terminal Server, with both the Server and Terminals running Ubuntu?

I would like to set up a Terminal server and connect 4 or 5 "terminals" running Ubuntu desktop for a small school. In functional terms, I'd like the students to be able to log on to their accounts ...
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1k views

create a AP-hotspot from a wireless connection

I need to create an AP-hotspot from a wireless connection. I use an external wifi adapter connected to my USB port on my laptop as a source for network connection. What I need to do is to extend that ...
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1answer
1k views

Samba could not change the permissions of folder “Network”

I'm currently trying to set up samba, and upon creating my first share, it asked if I wanted to set permissions automatically, and I said yes, and then I got an error saying "Could not change the ...
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159 views

SFTP to local ubuntu server crashes network [duplicate]

I have an Ubuntu server (named vader) running in my house that I would like to set up SFTP connections with my Mac (named MacbookBro). From vader, when I run: sftp mourkeer@MacbookBro.local It ...
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2answers
1k views

What could “reject due to mismatch with WPA/WPA2” in output of wpa_supplicant mean?

I'm trying to connect to an Android 4.0.4 device set up to be a wifi tether using wpa_supplicant with /etc/wpa_supplicant/wpa_supplicant.conf ctrl_interface=/var/run/wpa_supplicant ap_scan=1 network=...
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43 views

Cannot remove Nexus 5 Network from network list

When I click on the Network Manager indicator I have an odd entry in there called Nexus 5 network Clicking on it does nothing and it does not show up in the list of networks in Edit Connections ...
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1answer
2k views

Lan not working

I am about to use a wimax modem and obtain internet connection through the ethernet cables but when the ISP installer(who came to our house not that familiar in Linux) is about to configure, he can't ...
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254 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 ...
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1answer
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File Sharing Ubuntu Desktop 14.04 & OSX Mavericks

Trying to set up file share between Ubuntu Desktop & OSX Mavericks - have had massive issues so far due to my naivete. The Ubuntu Desktop machine will act as a server to a Macbook Pro & ...
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316 views

How can I connect to AirPort Extreme Shared Drive upon login?

I'm new to Ubuntu but I have successfully used the "Connect to Server" menu option in the Places window to connect to my external USB drive, which is shared on my Airport Extreme. I use the IP address ...
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2answers
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Ubuntu 14.04 LTS Network Manager overwrites static network interface

I spent far too long figuring this out, and wanted to share. Simple task: Add a static IP address to the 2nd of 4 NICs on my server. To start, I followed the instructions here under Static IP ...
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2answers
485 views

What is the best way to enable more than one network interface in a preseed (trusty)?

I need to enable both network interfaces on nodes that I deploy using MAAS. What is the recommended way to do that. Right now, only a single interface (eth0) is getting enabled. Do I modify the ...
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2answers
22k views

How can I change the network configuration on Ubuntu 14.04 server?

I just installed an Ubuntu 14.04 server, and I've discovered that there is no way to make any changes to the network configuration except by rebooting the server. This is on a stock install of Ubuntu ...
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3answers
466 views

Managed vs. Unmanaged switch for Beowulf cluster

I am setting up a very small Beowulf cluster with one master node (my Lenovo laptop) and two server nodes (Dell Optiplex 760s), all currently with Ubuntu 14.04. Can I get away with using an unmanaged ...
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Can not access ubuntu computer on my windows xp pc

I can see my ubuntu machine in the work group of my windows xp pc but when i click it says that it is not accessible/no permission/the parameter is incorrect etc.
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Why is my wireless network adapter acting in a strange way? (Ubuntu 14.04)

I have a laptop with Intel Centrino Advanced-N 6235 wireless network card, and I'm on Ubuntu 14.04. For almost a week I have had a strange problem with my wireless card. When I plug in the power cable,...
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282 views

iSCSI + br0 bridge + 14.04.1 Server = does not work

On one of my servers I have: USB 4GB: 1) EFI partition 2) /boot partition iSCSI 50GB (on another fileserver): 3) / partition In /etc/network/interfaces it works flawlessly if I have: auto p3p1 ...
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230 views

No Wireless Internet Connections Show Up!

Just got Ubuntu on another computer and I've never had this issue. On Windows Vista, (the operating system alongside Ubuntu) The internet works fine. But when I click on the icon in the top right, ...
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106 views

ssh to different network inteface?

I don't know the right vocabulary to more succinctly ask this question or to search for duplicates: Someone who knows what I'm trying to ask, please edit the title of this post to be more accurate. ...
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Unable to get both RA and DHCP6 address on a particular nic

My host is connected to a network that is connected to Router and DHCP6 server. radvd.conf setting on the router is given below: interface eth1 { AdvSendAdvert on; AdvManagedFlag on; ...
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1answer
18k views

How to Share folders in 14.04 Server with Gnome

I'm working with a new installation of Ubuntu Server 14.04 64 bit. During installation I picked the Samba Server option and I believe that it is running. My intention is that an OS X machine will be ...
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96 views

Network notification balloon stays showed too long

I'd like to know if there is a possibility and where can I adjust the network state notification balloon timer? Actually, if the computer is connected or disconnected to the network, the notification ...
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1answer
771 views

Ubuntu server can access internet but cannot ping systems in the LAN

I have 2 ethernet interface eth0 with IP 192.168.1.11 and eth1 with IP 192.168.1.12 and i have modem/router as 192.168.1.1. I can access internet from this server machine, but cannot access any ...
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58 views

Wireless Repeater causing kernel to crash

So my wireless set up is not ideal as far as my location relative to my AP goes. However I recently remembered I had/dug up an Amped Wireless 300N repeater (range extender). I set it up in my living ...
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340 views

TCP hash tables in Linux Kernel

I have implemented a solution to migrate sockets between servers running Linux OS. The migration mechanism works very well and the client is capable of continuing receiving his service from the new ...
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320 views

Which port and ip addresses are used while installing new ubuntu system

As we know that when, we install the new Ubuntu system and if we are connected to the internet then it can fetches packages from Ubuntu repository. So I have question which port and ip address is ...
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1answer
157 views

Mounting cifs network shares when logging into user account?

I have a couple of network shares mounted with cifs in fstab and it works fine when the network is up. However, this is a laptop and often my wi-fi connection isn't up when mounting is triggered by ...
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1answer
3k views

Multiple DHCP leases on single interface

If I want to have 2 static IP addresses, I can do something like this: auto eth0 iface eth0 inet static address 192.168.1.10 netmask 255.255.255.0 broadcast 192.168.1.255 auto eth0:0 ...
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2answers
512 views

Is it normal for openvpn-client to do this?

I have been using openvpn for a while, on an obscure port ( example, 43012). I've been noticing on my laptop (client) that whenever the vpn is connected, openvpn is listening on port 1194, which I do ...
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286 views

How to give a Juju charm a static ip address - wordpress

I have a wordpress charm installed via juju. In order for me to access this charm through public ip, I port forwarded the ip into my server's public ip address. Recently, the ip address of the ...
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185 views

Setting Internet Gateway

Friends, I'm stuck up with problem regarding to network configuration to make my Ubuntu 14.04 server machine as internet gateway in a LAN, and I am a relatively newbie in this regard. My scenario is ...
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Ubuntu can not ping Host Name but can ping IP?

well I just went into the Ubuntu world for administration. I found similar threads, except, I am able to ping my own Host name and IP address and my windows can ping my linux host name, but Ubuntu can ...
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2answers
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Wifi Not Working On Ubuntu 14.04 Lenovo G 50-30

I am facing problem to enable wifi on my Lenovo G50-30 Below are the command out put please help me out lspci | grep -i wireless: 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. ...
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42k views

Network Manager Icon disappeared 14.04

So a couple of weeks ago my network manager icon stopped appearing; I still get automatically connected to my saved networks and the internet works fine, etc. If I go into System Settings and look at ...