ifconfig (short for interface configuration) is a system administration utility

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5answers
13k views

What is the active MAC Address of my computer?

While looking to find the MAC Address of my computer as it appears to a wireless network, it was recommended that I run ifconfig. Having executed that command in the Terminal, I noticed that, unlike ...
3
votes
1answer
6k views

Connecting to internet after clean install of ubuntu server 12.04

I've installed ubuntu server on my computer. I would like to connect to the internet to download more software. I've done: ifconfig eth0 up so when I print ifconfig I can see the eth0 listed, but ...
0
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1answer
2k views

How to change wlan0's channel

When setting the channel to wlan0, I get an error: SET failed on device wlan0 ; Device or resource busy. I tried to shutdown wlan0 by: sudo ifconfig wlan0 down and wlan0 did not appear in the ...
4
votes
3answers
606 views

How to allow a “standard user” (no sudo) make IP config changes without requiring admin password

Anyone know if it is possible to have a "Standard User" account make IP changes (via GUI or terminal) without requiring the admin (sudo) password? I want the user to be able to change interface from ...
1
vote
2answers
99 views

Finding all other workstations on the network

at my home I have both workstations directly use Ethernet cables to connect to router, and also a few laptops/mobile devices that connect to wifi. Is there a command in linux to see list of all ...
2
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2answers
4k views

Identify Wireless MAC Address

I have a desktop for which I am using an Asus N-10 USB Wireless Adapter. No driver software is needed I guess since I can see the available wifi networks. However, I am unable to connect as the "MAC ...
1
vote
1answer
124 views

How can I make sure my server is connecting through my router?

I have a Ubuntu server with PHP, Apache2 and all of that setup and working on my LAN. Meaning from any computer connected to the same router I can connect to 10.0.0.3 (My server). I have setup my ...
1
vote
2answers
2k views

Why do i have to be root to run the command ifconfig?

I've recently switched from Ubuntu 10.04 LTS to 12.04 LTS, and one of the changes i have noticed is that when i try to run the command ifconfig (for example to view my own ip), i get the following ...
3
votes
5answers
16k views

Ethernet connectivity problems after upgrading to Ubuntu 12.04LTS

I tried upgrading once more to 12.04 after it went live. I had tried both Beta 1 and Beta 2. The problem is that now I'm getting sporadic network connectivity. My computer is hooked up straight to ...
2
votes
1answer
15k views

Is it possible to use Ifconfig to switch an interface to DHCP and if not, what is the best way?

I have just set up a new Ubuntu server and I am going to be doing a lot of networking tests. During setup, I simply skipped the network step. I now need to switch between DHCP and an address quite ...
2
votes
1answer
1k views

device shows up in lsusb + adb but not in ifconfig

I'm running Ubuntu in the VMWare Player under Windows 7: root@ubuntu:/# uname -a Linux ubuntu 3.0.0-17-generic #30-Ubuntu SMP Thu Mar 8 17:34:21 UTC 2012 i686 \ i686 i386 GNU/Linux I'm trying to ...
3
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4answers
16k views

ifconfig : Command 'ifconfig' is available in '/sbin/ifconfig'

My question is related to another open question. My echo $PATH gives me an output which is like ...
1
vote
1answer
243 views

Ifconfig bandwidth tracking

I've been using ubuntu servers for a long time, but something i've never quite understood was the ifconfig command and total bandwidth. I've found that on every server i've used, and some desktop ...
1
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2answers
2k views

How to restore ethernet connection?

I've had some issues with installing Lazarus in 10.04. After I finally installed it with aptitude, while running it prompted whole bunch of errors. Finally my PC was suspended and I had to reset it. ...
1
vote
0answers
665 views

OpenVPN bridge client on Ubuntu 11.10 doesn't work [closed]

I'm trying to set up my desktop running Ubuntu 11.10 to connect to my OpenVPN server in bridge mode. I have my client configuration file set up like so: remote [omitted] 1194 client dev tap0 proto ...
2
votes
1answer
211 views

Likewise 6.1 breaks network on Ubuntu 10.04.3

I'm trying to use PowerBroker LikeWise 6.1 on Ubuntu LTS 10.04.3 to join to my AD domain. I've done this in the past before LikeWise was owned by PowerBroker & I can get it to work "pretty well". ...
1
vote
0answers
145 views

I'm having trouble connecting to a wireless network, and the hardware switch is on, [closed]

So, just recently my computer has not been connecting to the internet. It had been working before but it just went off one day in the middle of use. I've gone into the network setting and made sure ...
0
votes
4answers
875 views

How do the ifconfig settings work?

I have $ ifconfig eth0 Link encap:Ethernet HWaddr 00:1f:d0:99:ea:a9 inet addr:192.168.1.130 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: ...
2
votes
3answers
4k views

ethernet disconnected, shows up in ifconfig

I am running 11.04, no remix. After installation, I could use wireless networks, but not ethernet. When I click on the connections menu item, it says Wired Network disconnected How do I fix this? ...
2
votes
1answer
2k views

Losing ip addresses, during cable disconnects

I have two Ubuntu PCs whose network cards connected directly to each other with cross-over cable. I have assigned ip addresses manually to their interfaces using command similar to ifconfig eth0 ...
0
votes
3answers
3k views

Command line ifconfig problems - Not detecting all NICs

I am in the command line of Ubuntu server edition 10.04 and I have 3 Nic cards installed. When I type ifconfig it only detects one: Eth0. I tried doing sudo apt-get update, this did not work. Any ...
1
vote
1answer
3k views

How do I make the script to run automatically when tun0 interface up/down events?

I use VPN client to connect to my corporate servers. It creates tun0 interface after starting the client. I've written script which install specific routes point to tun0 interface and rest to use ...
2
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2answers
4k views

How to configure my VirtualBox's Ubuntu IP?

I can't ping my Ubuntu on VirtualBox (within another Ubuntu). I had set my ip using: # ifconfig eth0 192.168.0.2 netmask 255.255.255.0 up but the ping still fails. What's different when you're in ...
1
vote
3answers
3k views

Connected wireless connection, but no wlan0. What's causing this?

I'm connecting (to the internet) over a wireless connection (as in, it's already connected), but there's no wlan0. Output produced by ifconfig: eth0 Link encap:Ethernet HWaddr 5c:ff:35:06:9c:b3 ...
3
votes
2answers
8k views

Add static ARP entries when network is brought up

I have some pretty dumb IP devices on a subnet with my Ubuntu server, and the server receives streaming data from each device. I have run into a problem in that when an ARP request is issued to the ...
2
votes
2answers
4k views

eth0 not working on startup

This might sound strange but, working with my Lubuntu 10.04 i've experienced troubles when connecting to my eth0 newtwork. After some googling, i've found out that by writting in the CLI the following ...
3
votes
1answer
10k views

How to define a secondary IP address that is down by default

I can define a secondary IP address on the same network card by adding the lines auto eth0:1 iface eth0:1 inet static address 192.168.9.101 ... to /etc/network/interfaces. This ...
22
votes
3answers
11k views

What is the difference between Network Manager and 'ifconfig' 'ifup', etc?

Ubuntu seems to provide at least two network "toolsets" (for lack of a better term). I'm running into conflicts between these two. Network Manager Something which is more like the traditional ...