Questions tagged [ifupdown]
The ifupdown tag has no usage guidance.
11
questions
16
votes
1
answer
4k
views
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:...
5
votes
1
answer
184
views
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 ...
- 51
1
vote
1
answer
738
views
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 ...
- 3,362
1
vote
0
answers
21
views
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)...
- 11
0
votes
1
answer
416
views
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 ...
- 215
0
votes
1
answer
3k
views
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 ...
- 41
0
votes
1
answer
29
views
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 ...
0
votes
0
answers
190
views
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
...
- 11
0
votes
0
answers
264
views
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 ...
- 1,299
0
votes
0
answers
42
views
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 ...
- 849
0
votes
1
answer
565
views
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