Questions tagged [interface]
The interface tag has no usage guidance.
123
questions
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2
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Display the IP addresses of all currently configured interfaces [closed]
Display the IP addresses of all currently configured interfaces. The output should
done in the following format:i
The interface eth0 currently has the IP 192.168.178.22
The interface eth1 currently ...
user523942
1
vote
0
answers
36
views
renaming wireless interface
I know I can rename my wireless interface with ip link set name , but when I do other programs won't identify the new name, namely wash, and then if I run iwconfig down I can't get systemctl won't ...
- 11
0
votes
0
answers
54
views
Debian name wifi interfaces according to their drivers using udev persistent-net.rules?
Hi I am working on Debian. Would like to name my wifi interfaces according to their driver
modifying /etc/udev/rules.d/90-persistent-net.rules
with:
SUBSYSTEM=="net", ACTION=="add&...
- 113
0
votes
0
answers
115
views
how to create virtual interface without ip address and without link to base interface in /etc/network/interfaces on Ubuntu/Debian
I have these two virtual interfaces test1 and test2 without ip addresses through this command:
ip link add test2 type veth peer name test1
root@ubuntu:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu ...
- 31
2
votes
1
answer
179
views
Interface groups
I started to study Linux networking system (especially Ubuntu) lately.
I got interface info by command ip a like this:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group ...
- 23
0
votes
0
answers
28
views
CentOS: fix nic name to eth0 for a specific mac yet keep others nic names be eth1,2,3
Not just a simple case of fixing nic name to eth0 for a specific mac, I have done that, but this time it is a special case:
By default:
first detected nic (disconnected) -> eth0
second detected ...
- 219
0
votes
0
answers
112
views
nmcli add a route to dev not a next hop
Need to add a static route with nmcli to a device interface.
I would like to mimic a command like this with ip route (traffic sent to the interface NOT a next-hop ip)
ip route add 4.4.0.0/30 dev ens4
...
- 294
0
votes
1
answer
21
views
Measure traffic for an interface monthly
I am running a small RPi server in a remote home and I have a simcard with very limited data usage. I would like to have a file that measures cumulatively month by month (starting, for example, from ...
- 709
1
vote
1
answer
245
views
RTNETLINK "file exists" error when attempting to create veth interface that was previously a dummy
Linux Mint 20.2
I used this command to create a dummy ethernet interface called veth0:
sudo ip link add veth0 type dummy
Once finished I removed it with:
sudo ip link delete veth0 type dummy
The ...
- 11
1
vote
2
answers
281
views
Meaning of "default" in "iface default inet dhcp" in interfaces file
My /etc/network/interfaces file contains the line:
iface default inet dhcp
I vaguely remember putting it in there years ago, but I don't remember why I did so.
If I am not mistaken, iface precedes a ...
- 23
0
votes
2
answers
713
views
nmcli - command line means to delete all wifi / wlan0 connections
I'd like to delete all active or inactive Wifi connections on interface wlan0, with the intention of having a known-empty clean slate to set things up. Is this possible?
I was hoping for something ...
- 1
0
votes
0
answers
246
views
How to redo renaming interfaces with 70-persistent-net.rules?
I use Ubuntu 18.04 and renamed the interfaces and want to redo this renaming. I don't want to use the 70-persistent-net.rules for the back renaming.
I delete the content and removed the file with ...
- 71
0
votes
0
answers
154
views
I can't state up my interface
sudo ip link
output:
2: wlp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue state DOWN mode DORMANT group default qlen 1000
link/ether 80:c5:f2:81:ca:31 brd ff:ff:ff:ff:ff:ff
sudo ip link ...
0
votes
1
answer
372
views
Logical Device Name assigned to Physical NIC mapping
I'm looking for a scripted solution that will show which logical network interfaces are mapped to which physical NICs.
That is, if a server has 2+ interfaces and 2+ NICs, how do I know which NIC ...
0
votes
2
answers
1k
views
how can I change the interface ip address in linux without ifconfig command. my current interface and want to change the ip to 192.168.10.100
network:
version:2
renderer :
ethernets:
ens160:
dhcp4: no
dhcp6:
no address: 192.168.10.13/24 gateway4:192.168.10.1
nameservers:
addresses: 142.55.100.25
142.55.44.25
- 11
3
votes
2
answers
5k
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/etc/network/interfaces - difference between auto and allow-hotplug
I am running Debian 9.13. I tried to check what is the difference between auto eth1 and allow-hotplug eth1 in /etc/network/interfaces. I have eth1 networking interface connected via USB. I tried ...
0
votes
0
answers
101
views
Secondary (Virtual) Interface on Same NIC with DHCP
I'm currently working on Buster, but the more portable the solution, the better.
I have a system for which I would like to add a second IP address to the same adapter. The initial IP address is DHCP, ...
- 11
1
vote
2
answers
415
views
Automatic set-up, the network can bus with Ubuntu 20.04
I want to set-up the network of the CAN bus automatically with Ubuntu 20.04.
For other distributions, it is done like this in /etc/network/interfaces:
allow-hotplug can0
iface can0 can static
...
- 11
0
votes
1
answer
140
views
What are the key components of a desktop environment?
I'm a relatively new Linux user. I started with Ubuntu 20.04 a few months ago, and eased myself into the experience, learning a bit of the command line and becoming familiar with the system structure
...
- 157
0
votes
1
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291
views
How to configure 2 network interfaces which make use of the same physical ethernet port?
I currently have a linux system with only one physical ethernet port. This physical port has the eth0 network interface attached to it. I want to create another ethernet interface which also makes use ...
1
vote
0
answers
428
views
Ubuntu 20.04 problems with interface after installation
I have just installed Ubuntu 20.04 Focal Fossa. After the restart, I found a particular problem with the interface (see figure attached).
I'm a beginner in the use of Ubuntu, I have managed to work ...
- 11
0
votes
1
answer
371
views
Create can0 interface for USB CAN Converter Basic (UCCB) on Arch
I have a USB CAN Converter Basic as described here:
https://ucandevices.github.io/uccb.html
When I plug it into my Arch Linux laptop, dmesg shows the following:
usb 1-6: new full-speed USB device ...
user355177
0
votes
1
answer
14
views
My CentOS do not have the brief command vie0
I watch a video, theres has a brief command:
I use vie0, but there do not have this command:
[root@ansible-master ~]# vie0
-bash: vie0: command not found
My CentOS version is: CentOS 7.2
- 613
1
vote
0
answers
1k
views
How to change network mask using ip command
I tried to change the network mask using Linux ip command and got confused. Google search doesn't clarify it either. If someone could explain? Say I have interface enp0s31f6 on my Linux machine
rtuser@...
- 11
2
votes
1
answer
696
views
Route traffic between interfaces on same device ( wlan0 to usb0 )
I have a usb0 interface with 10.0.0.1 ip with a router on 10.0.0.2 and unaccessible to internet. I also have a wifi adapter on wlan0 with 192.168.0.3 connected to my router at 192.168.0.1 (this is ...
- 21
1
vote
1
answer
508
views
How to reduce the time of the "networking.service" service?
I have been using linux for some time and I have already learned to adapt to this new operating system so I want to improve some details of my configuration.
Currently the system loads fast, but I see ...
- 125
1
vote
0
answers
46
views
How can I switch dinamically the output interface in a router depending on input interface?
I have an Ubuntu 18.04 acting as router with 3 interfaces. Two of them end up in the same device (they are used as dual path since depending on the situation one of the paths can be down or viceversa)....
- 11
0
votes
2
answers
793
views
Send packet on one interface and receive it on another one for testing purposes
I would like to test the DHCP client that I wrote on Ubuntu 16.04.6 LTS. I would like to do it locally on my laptop i.e. send and receive DHCP packets inside.
Here is what I tried:
created two dummy ...
- 3
0
votes
1
answer
225
views
Change interface name
I'm with NetworkManager
I want to change the interface name, what I don't know sure the steps....
First I should know my interface name and mac from it,
ip a
Seconds, set down the interface,
...
- 147
3
votes
1
answer
3k
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dummy interface on linux
I need to create a second separate virtual interface on Linux.
I choose dummy. And do these steps:
$ cat /etc/modules-load.d/dummy.conf
# Load dummy.ko at boot
dummy
$ cat /etc/sysconfig/network-...
- 31
0
votes
1
answer
215
views
Traffic into lo vs eth, why might I be seeing only half the traffic on lo compared to eth?
I am forwarding traffic to ports on eth0 and lo.
For the same traffic at the same ports and different ports, when I do a tcpdump and count the packets, for time t, I only see about half the number of ...
- 101
0
votes
0
answers
42
views
How to route network traffic through an interface on another host?
I have limited networking knowledge, so please bear with me :)
I have a host that runs a VM that has 2 interfaces (ens33 and crc). My host has an interface (eth0) that is on the same subnet as "ens33"...
- 13
0
votes
1
answer
1k
views
How to Combine a Bridge with VLAN over a Bonding and Two Default Gateways
I have a Linux server with three NIC that are connected to a switch (one NIC is the management, two NIC form a LACP bonding). In addition I need to use a VLAN (167), because the switch is configured ...
- 25
0
votes
1
answer
691
views
How to set the interface name in `kickstart.cfg` file?
How to set the interface name in kickstart.cfg file?
We know if we install CentOS system in a Server, there maybe eth0, ens0, ensxxx, eno1 and so on.
I have questions,
Why there will generate ...
- 613
1
vote
1
answer
5k
views
Bonding of two NIC does not work/go up
I have a Linux server with two NIC that are connected to a switch (and one NIC for management) and I want to use combine them and use LACP there, but for some unknown reason to me the bonding will ...
- 25
6
votes
1
answer
2k
views
Where does ethtool get information from?
When I run the command ethtool -S wlp2s0, I get the following information:
NIC statistics:
rx_packets: 63
rx_bytes: 14163
rx_duplicates: 2
rx_fragments: 58
rx_dropped: 30
...
- 199
0
votes
1
answer
77
views
I do not want a debian interface [duplicate]
Today I set up an old portable pc to be a dedicated machine
I have installed debian and at installation process I have chose Cinnamon for graphical interface
Now my system is configured and working ...
- 31
-1
votes
1
answer
973
views
Kali Linux (Kernel 4.19) MT7610u failed to load
I have installed Kali Linux alongside windows 10 on my system all is good except I get the following errors in dmesg every time I boot.
mt76x0 1-1.3:1.0: firmware: failed to load mediatek/mt7610u....
1
vote
0
answers
3k
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UDP send buffer error in netstat
I we are running voice application which stream UDP (RTP) packets for voice, I am investigation some strange issue where my ifconfig ens4 | grep error counter going up specifically overrun
If you see ...
- 1,530
4
votes
6
answers
3k
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setting firewall-cmd --permanent is not sticking after reboot
I have two network interfaces: eth0, and p2p1. My default zone is set to public. I would like to permanently set p2p1 to be trusted.
In order the achieve this I run:
sudo firewall-cmd --permanent --...
- 297
0
votes
1
answer
227
views
Error running vlc on Redhat Enterprise Linux 7
I have installed vlc using following commands-
#> yum install vlc
#> yum install vlc-core
When i try to run vlc, i am getting the following error-
[0000000001bce288] core demux error: ...
- 11
-1
votes
1
answer
6k
views
eth: error fetching interface information: Device not found
I have an ubuntu 18.04 linux server.
Why does the command(ifconfig eth) says Device not found whereas this command(ifconfig eth0) works?
$ ifconfig eth
eth: error fetching interface information: ...
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9
votes
1
answer
3k
views
What does "if1@if2" mean in interface name in output of "ip address" command on Ubuntu
What does at sign (@) mean in interface name in output of "ip address" command (or the "ip link" command) on Ubuntu, for example interface name "eth0@if44" in the following output:
root@aafa1fc24a0b:/...
- 193
2
votes
1
answer
1k
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Edit interfaces file in C++
Is there any known API to edit /etc/network/interfaces file?
I've written a piece of code to make the user able to change IP address of the system from the frontend (web interface). I'm modifying the ...
1
vote
1
answer
2k
views
Linux emulate multiple Wifi connections
I have a Linux machine that creates a Wifi hotspot. I need to simulate a few clients connecting to that hotspot and then using that connectiong to talk to a service, through the wlan interface. The ...
- 113
1
vote
1
answer
911
views
How to use different virtual network interfaces for different processes?
The solution to non-virtual network interfaces is here: https://unix.stackexchange.com/a/210992
But the problem is I have multiple IPs on one network interface and I'd like to be able to assign each ...
- 111
0
votes
1
answer
318
views
How to interface LCD for new WaRP7 (imx7s-solo)?
I'm trying to interface LCD for my new WaRP (imx7s-solo). (we can found both LCD and WaRP7 here LCD and WaRP7 product) The problem is I can not have enough knowledge to verify my work is right or ...
- 3
0
votes
1
answer
179
views
Getting unexpected interfaces in CentOS 7
Suddenly getting some bulk interfaces which should not be in server. Interfaces named like as0t1,as0t2,as0t3 etc. Almost 40 interface like this has been created of which i have no idea. Actually some ...
4
votes
0
answers
1k
views
Entries order in /etc/network/interfaces
I have a device with two interfaces, eth0 and eth1. One should get its IP from a DHCP server and the other should get its IP statically.
If my /etc/network/interfaces file is configured as follows:
...
- 51
4
votes
2
answers
2k
views
Connecting two clients on different physical interfaces using smcroute
I am very new to networking. I have two clients connected on two different physical interfaces which has upnp running on them. I want to add both of them to the same multicast group, so that they both ...
- 193