Questions tagged [ifconfig]

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

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Internet not working [closed]

Iwconfig is showing my essid but ifconfig is not showing my ip neither internet is working I tried to connect through nmcli but it showed timeout /sbin/iw wlp2so link is showing connected I am using ...
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Error for wireless request “Set ESSID” (8B1A)

I'm trying to connect to different wireless APs through the Terminal but I'm always receiving this error. libe@libe-HP-Notebook:~$ iwconfig wlp2s0 essid "MOVISTAR WIFI3888" key s:lalalala ...
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Intel NUC BEH2-i3 Internet RX drops/packet loss and device interrupt

I recently switched from windows 10 to Ubuntu 20.04LTS because i want to host a server (minecraft) Now it appears i have packet loss as i see this on ifconfig and netdata (webmonitor). I get the ...
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How to hold a point to point wired connection up

I am trying to transfer files between two computers over a point to point gigabit Ethernet connection. I run the following command to bring up the interface: ifconfig eno1 192.168.100.1 up On the ...
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Which one is my ip address in Ubuntu

I am new in ubuntu. Which one of following is my ip address ? This is result of "ifconfig" on terminal This is result of "ip a" on terminal
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How do I install ifconfig on Ubuntu 18.04 with no net-tools package available

I get that ifconfig is deprecated on some distros, but I really don't care. All the other OSes I work on use ifconfig. Odds are, I've been typing ifconfig since before you were born. There is ZERO ...
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When i type ifconfig, why my IP Address not showing?

There is an Ubuntu server 18.04 LTS, when i done setting IP Address and all process finish, then i check IP Address $ifconfig, but its not showing. But, only like this, lo: flags=73<UP, LOOPBACK,...
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How can I distinguish between whether I have a wifi or a bluetooth connection on 18.04

I'm running 18.04. My Sonic wifi is constantly dropping. Eventually, it seems to come back of it's own accord, but since this is unpredictable, I often resort in the meantime to a bluetooth ...
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After a restart due to a system crash the ethernet interface is disappeared. How to restore it?

I am not so into Linux and I am experiencing a very strange problem with a Linux 19.10 system on which I am working into VmWare workstation (but I suppose that it is not a VMware related problem). ...
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Ethernet option not showing in ifconfig. I am using ubuntu 18.04.1. sudo lshw -C network shows network unclaimed

The output of ifconfig is lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (...
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18.04.4lts upgrade no network eth0 or usb wifi

after applying upgrade to 18.04.04lts - eth0 does not connect when plugged in and Edimax usb wifi adapter is not recognized; ifconfig displays info for enp2s0 and lo only
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18.04: Different IP addresses found with IP lookup command line

I am doing the following from Ubuntu 18.04 LTS: ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 172.17.208.65 netmask 255.255.255.240 broadcast 172.17.208.79 ...
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Help with finding a “default” IP on a device with static ip [closed]

So I had a device that I connect via ethernet. It had a default interface file like this one: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp hostname dummy I changed dhcp to ...
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I used to “eth0”, why now we have “enp3s0” and “ens3”? [duplicate]

So ... I remember vaguely how to setup network with static IP. I got dedicated server from ikoula and for some stupid reason, it doesn't have DHCP. Before, I would just add the static IP to /etc/...
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Ethernet port missing in Jetson TX2

I have a Connect Tech Rudi TX2 device that came with Ubuntu 16.04 installed and it had two physical Ethernet ports eth0 and eth1 (they also worked). After upgrading the Jetson platform to a newer ...
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What happens if I disable the loopback device using ifconfig?

I found out that I can disable my interfaces using $ sudo ifconfig lo down I want to know what happens if I disable my loopback interface forever. It's disabled now and nothing has changed. Are ...
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ifconfig doesn't count packets for traffic in promiscuous mode

I'm capturing a promiscuous traffic by tcpdump but idon't know why ifconfig doesn't show captured traffic bytes/packets!!! Only i can measure throughput with iftop. Other tools like ifconfig, bmon ...
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Ubuntu-Trouble with wifi network drivers

I work with the laptop AMD A9-9420 RADEON R5, i installed Ubuntu 16.04 and i have internet by the link but i've got a problem with the wifi-newtwork because i cannot see the icons of the wifi-networks....
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restart needed for changing static IP to be applied

sometimes on Ubuntu, I need to restart the system in order to static IP that I have set to be applied. I mean it should be changed once I have selected the network interface and bring it down and ...
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ubuntu PC TX packet keep going up to unknown ip address and network crash

I am facing some problem with past 1 month,after re install any ubunthu ver it's working like 12 hours and after like 12 hour My ubuntu pc tx paket keep going up to unknown ip address and my network ...
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What is the correct way to change an IP address from the CLI?

So, I'm a linux admin of many years, however, this still annoyingly throws me. If I have a server with a static ip set in /etc/networking/interfaces and change the IP, what is the best way to ...
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Routing Docker in ubuntu

In my routing table on Ubuntu 18.04 I have these entries: 172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-9f3f970041e3 172.18.0.0 0.0.0.0 255.255.0.0 U ...
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Destination Host Unreachable sharing WiFi from Ubuntu to Win10

I'm trying to share my wireless connection (wlp1s0b1) on my Ubuntu 16.04 headless laptop to my Windows 10 PC via ethernet (enp0s9). This is a diagram of my network: Router (198.168.0.1)---(wifi)--->...
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Netplan configuration doesn't seem to be taking effect

After configuring a static ip address in /etc/netplan/01-network-manager-all.yaml for my wlan interface, the ip address nor the dns changed. I used sudo netplan generate and sudo netplan apply, but ...
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wlan0 not showing up in ifconfig/iwconfig

I've tried all the other threads and nothing is working. I'm very new to Ubuntu. I'm trying to use reaver and when I attempt it says [-] Failed to retrieve a MAC address for interface 'wlan0'! So ...
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1answer
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The 'proper' way to get ONLY my eth0 netmask via CLI in Ubuntu 18.04 on VPS?

According to this answer and many other tutorials throughout the web, ifconfig will list lots of fascinating and useful information. And, that seems the standard way to find out stuff like my netmask. ...
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Ifconfig nonexistent, no wifi adapter

It appears this is a common topic but I think my problem may be unique in that I cannot find ifconfig. I was trying to follow this tutorial and others. I am on Ubuntu 18.04 and Windows 10. When I type ...
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Connection works, iwconfig doesn't

I am trying to get information about my wlan0 connection from iwconfig. When I run iwconfig I get this: wlan0 no wireless extensions. When I run ifconfig I get wlan0 Link encap:Ethernet HWaddr ...
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On 16.04, ifconfig-style interface-alias is lost when dhclient fails to get a lease

I have a lot of machines (both old ubuntu14.04 as well as newer ubuntu16.04) that have their integrated ethernet configured like this: /etc/network/interfaces: allow-hotplug eth0 iface eth0 inet ...
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VM (created through Vagrant) is not listing the inet in eth1

I created a vm through vagrant with the following in vagrant file: config.vm.box = "ubuntu/trusty64" ...... ..... .. config.vm.network "public_network" Note the warnings here : default: Warning: ...
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Ubuntu 14.04 lost wlan0 connection after a certain time

My computer is running Ubuntu 14.04 without GUI. The wlan0 connection is working fine (in the first 5 mins or so) every time I start the computer. Here are the ifconfig and iwfonfig output at the ...
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Clean output from IP like ifconfig gave

Is there a way to get a clean/well formatted output from ip? I know I'm still learning to us it but compared to what ifconfig used to print 'ip a' is just a mess and takes far longer for your eye to ...
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Change network mac address using “ip” command

Usually I would be able to change my wifi mac address with the ifconfig command like : ifconfig <iface> hw ether XX:XX:XX:XX:XX:XX Ubuntu have however deprecated ifconfig in behalf of the "ip" ...
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switching from ifconfig to ip but still not seen by router

I have searched google, askubuntu and stackoverflow and I cannot find a solution to my situation. currently on ubuntu 16.04.4 LTS previously connected to Netgear R7000 behind att pace 5268AC with a ...
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Ifconfig in Ubuntu 18.04 is not working [duplicate]

Recently I have switched from Ubuntu 16.04 to 18.04 and I have found that ifconfig is not working in Ubuntu 18.04. So what alternative does Ubuntu 18.04 offer and what is the reason for removing/...
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OpenSuSE removed netstat and ifconfig. What are the plans for ubuntu?

OpenSuSE removed netstat and ifconfig. What are the plans for Ubuntu? Will Ubuntu remove these commands, too?
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ifconfig missing after Ubuntu 18.04 install

I've just installed Ubuntu 18.04 and selected "minimal install". I then tried to run ifconfig in the terminal and got the following message -bash: ifconfig: command not found How come the net-tools ...
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Ubuntu 17.10 with two NICs: routing requests to correct NIC

I have done a bunch of searches about this, and found a lot of answers that don't quite seem to fit my question. If this question has been answered already, I apologize. My PC has Ubuntu 17.10, and ...
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Add second IP-address to interface in 17.10

How do I add a second IP-address in Ubuntu 17.10 like the old days where you could add eth0:1, eth0:2 etc. I've tried but lots of commands have been deprecated like ifup, ifdown etc. and the network ...
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1answer
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ifconfig wlan0 down in ubuntu 17.10

I am wondering how to use ip in ubuntu 17.10. For instance, how we are going to implement the following down/up in ubuntu 17.10? ifconfig wlan0 down/up
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inet addr missing after ifconfig

I am making a cloud server and am following this video tutorial. Everything went FUBAR when I used the ifconfig command in the terminal and did not receive the IP of my server. I have also tried ...
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cannot maintain new mac address via macchanger

While playing with macchanger, I noticed that in attempting to create a random mac address, upon bring the wireless connection back online the mac address reverts to the permanent mac address once i ...
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1answer
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no primary network interface declared for /etc/network/interfaces

Looking at setting up a bridge network, I switched from wi-fi to a wired connection. However, my networking is different than described: $ cat /etc/network/interfaces # interfaces(5) file used by ...
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1answer
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ifconfig not updating with new dhcp provided address

I have a machine that I've setup as a router using Ubuntu 17.10 server. I have three Ethernet ports: one I use as a WAN [referred here as: ${WAN}], and the other two I've bridged as LAN. My WAN ...
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Interfaces with non-physical interfaces

I found a rather big difference between some boxes I have (some are debian... some ubuntu), and I'm not sure why... or what the fix might be. Essentially... if I create an "iface" entry in interfaces ...
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1answer
953 views

difference between methods to use multiple ip addresses

I have a question about using multiple ip addresses on one NIC card. I have searched, and found some methods. Method 1 (Adding new ip, 192.168.201.131) Add new ip by using ip addr add command $ ...
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1answer
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Why does `/sbin` not included in $PATH for new user?

ifconfig is located in /sbin/ifconfig. I don't have problem issuing ifconfig command in root user. The problem started when I created a new user. root@Ubuntu:~# useradd -m user root@Ubuntu:~# root@...
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Network connection failure

There is network connection loss on an Ubuntu 16.04.3 desktop machine. systemctl status networking.service gives following output: Failed to start Raise network interfaces. sudo service networking ...
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How do I configure DNS resolution if resolvconf doesn't work?

My /etc/resolv.conf will not be written so DNS resolution is not working. I'm running Ubuntu Server 16.04.1 LTS in a virtual machine on our office server. This is my /etc/network/interfaces: # This ...
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2answers
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How do I assign a static IP address in Ubuntu 17.04 without rebooting?

How do I assign static IP addresses to interfaces in Ubuntu (17.04) without rebooting the machine? This is pretty straightforward on a Unix machine, but I'm having trouble on this one. Please don't ...