Questions tagged [ifupdown]

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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 ...
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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)...
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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 ...
  • 1,279
12 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:...
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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 ...
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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 ...
  • 797
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 ...
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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     ...
  • 136
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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 ...
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 ...
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