Questions tagged [ifupdown]
The ifupdown tag has no summary.
18 questions
2
votes
1
answer
117
views
dhcpcd does not send hostname, reverse DNS does not work
I am using Debian Trixie on a server. I have installed it using ZFSBootMenu documentation, without a desktop environment. The installation is quite minimal in term of packages.
My motherboard has 2 ...
- 1,458
4
votes
1
answer
2k
views
SSH access broken; probably due to my dislike of 'NetworkManager'
I've apparently "broken" network access to one of my Debian 'bookworm' systems that run on Raspberry Pi hardware. This resulted from my apparent lack of understanding of details wrt how the ...
- 3,904
0
votes
2
answers
489
views
Why can't ifupdown find dhcpcd?
So I have an embedded system I've built with yocto. I'm trying to enable DHCPv6. But when I try to bring the interface online, ifup says it can't find DHCPv6 software, even though dhcpcd is ...
- 45
1
vote
1
answer
197
views
Debian Ifupdown /etc/network/interfaces : network vs netmask
I came accross the following bit of network conf and the part I don't get is the keyword network.
Given that netmask is fed, what is the purpose of network ?
Disclaimer : I'm not a guru of network ...
0
votes
1
answer
174
views
How can I configure isc-dhcp-client differently according to the chosen logical interface?
I am using debian ifupdown’s mappings, with guessnet, to connect to the “right” WiFi network wherever I am. Here is an excerpt of my /etc/network/interface:
mapping wlp2s0
script /usr/sbin/...
- 1,729
0
votes
1
answer
474
views
ifdown: interface end0 not configured. RTNETLINK answers: File exists. ifup: interface end0 already configured when setting static and DHCP interface
In a device with Debian BookWorm 12.5, I want to enable and disable a static IP using a Node application at runtime. The /etc/network/interfaces is the following :
auto lo
iface lo inet loopback
...
- 230
2
votes
1
answer
679
views
default gateway not set when using bond0 interface
This is my /etc/network/interfaces file:
auto bond0
iface bond0 inet manual
address 10.66.7.11/24
gateway 10.66.7.1
bond-mode 802.3ad
bond-slaves eth2 eth3
bond-miimon 100
bond-...
- 878
0
votes
1
answer
350
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
430
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
1
vote
0
answers
31
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
21
votes
1
answer
9k
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:...
0
votes
1
answer
1k
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 ...
- 205
0
votes
0
answers
66
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 ...
- 999
5
votes
1
answer
1k
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
0
votes
1
answer
974
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
...
- 218
0
votes
1
answer
6k
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
1
vote
1
answer
2k
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 ...
- 3,740
13
votes
3
answers
69k
views
Why are post-up commands in /etc/network/interfaces ran multiple times at boot?
Here is the content of /etc/network/interfaces:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
post-up /etc/network/if-up.d/sshstart
And sshstart is a script with the following in it:...
- 1,119