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Questions tagged [ifupdown]

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16 votes
1 answer

DNS broken when using ifupdown and systemd-resolved after upgrade to Ubuntu 22.04

TL;DR sudo cp -p /etc/network/if-up.d/resolved /etc/network/if-up.d/.resolved.broken-orig #Edit /etc/network/if-up.d/resolved and take out the extraneous quotes on lines 48 and 52 #The fix looks like:...
Spokane_is_actually_kinda_okay's user avatar
5 votes
1 answer

How can i find out which network interface managing solution is used on a given linux distribution in an easy and robust way?

I frequently find myself sitting in front of various different Linux installations and need to check or change network settings. They are different versions from different distributions (mostly debian ...
Sorontik's user avatar
1 vote
1 answer

How can I figure out why my network configuration is simply ignored?

I have been running Debian 10 a.k.a. Buster without issues. My problems started when all of a sudden, network connectivity dropped. At that point, NetworkManager was active. I stopped and disabled the ...
berndbausch's user avatar
  • 3,362
1 vote
0 answers

Building a lab, interfaces file issue, networking service won't restart because of ifup

Hello (beginner to linux networking), I'm trying to build a lab in VirtualBox with a Debian GLPI server for school, the VM has 2 network interfaces : a NAT one in dhcp (eth0) and the other one (intern)...
arty0m's user avatar
  • 11
0 votes
1 answer

ifupdown change parameters dhclient

I have Ubuntu 20.04 where I gave all network functions to ifupdown. 1 of my interface got network parameters by dhclient: #/etc/network/interfaces allow-hotplug enp2s0 auto enp2s0 iface enp2s0 inet ...
KonstantinKuklin's user avatar
0 votes
1 answer

ifdown: interface enp0s3 not configured. RTNETLINK answers: File exists. ifup: failed to bring up enp0s3

I have a virtual box (6.1) with ubuntu minimal. in the settings of the virtual machine in the network section, "Bridged Adapter" is selected. root@ubuntu:/home/mista# dmesg -T|head -1 [Sun ...
Mexanizm456's user avatar
0 votes
1 answer

dhclient process messes up the wrong interface

I'm using Debian Buster and I have two interfaces configured: eth0 and wwan0 (broadband modem). Here's the relevant part of my interfaces file: # The primary network interface auto eth0 iface eth0 ...
Alexandr Zarubkin's user avatar
0 votes
0 answers

Bridge won't get DHCP address if network available AFTER boot

I have 2 ethernet ports bridged as follows (/etc/network/interfaces.d/br0): auto br0 iface br0 inet dhcp bridge_ports enp1s0 enp2s0 bridge_fd 0 bridge_waitport 0 ...
Lewis Smith's user avatar
0 votes
0 answers

Why is bridge-utils slowing down ifupdown-pre.service at boot?

Since I configured a bridged interface, I noticed that the boot went from 3-4 seconds to about 20 seconds. Here are my investigations, the ifupdown-pre.service is to blame. But why ? Note1 : I'm on ...
ChennyStar's user avatar
  • 1,299
0 votes
0 answers

Bringing up ethernet device under Debian riscv64

I have a Sipeed RV 86 device, which is a RISCV 64bit. On this,I run a minimal Debian OS, that let's me log in via the USB interface, as the device shows up as ttyUSB0 on the host Linux PC. When I then ...
Bram's user avatar
  • 849
0 votes
1 answer

Adding a VLAN-transparent bridge to Linux (Debian)

On my current Debian system I use VLAN tagging and I create bridges br-wan and br-lan that I use for LXC containers: auto lo br-lan br-wan iface lo inet loopback iface br-wan inet manual     ...
divB's user avatar
  • 136