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I want to install some packages via Ethernet, but it does not seem to be working. I want a DHCP connection.

Here is what I tried:

ifconfig (net-tools was installed via usb)

Which only gives LoopBack

Trying to modify the etc/network/interfaces file using cat etc/network/interfaces:

cat: /etc/network/interfaces: No such file or directory

I tried looking in the etc/network folder only to find that there are only 3 files:

if-post-down.d if-pre-up.d and if-up.d

Looking at /etc/netplan/00-installer-config.yaml it shows this:

  network:
        ethernets: {}
         version: 2

How can I solve this?

CodingM
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  • @user535733 I have looked in the /etc/netplan to find a file called 00-installer-config.yaml. Is this it? I have tried looking at it in vi. – CodingM May 16 '20 at 17:12
  • @user535733 I would like to try both, but for now I will try DHCP. I will edit the question to show the .yaml file. – CodingM May 16 '20 at 17:15

1 Answers1

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Netplan is the tool for configuring networks now.

Step 1. Use ip addr to locate your interface name

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
2: enp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
3: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
  • Here, you can see that my ethernet interface is named enp3s0.

Step 2. Modify the netplan YAML file. Here's an easy example:

  • This requires a text editor and sudo, of course.

  • Tip: Proper indentation is critical, Use spaces, NOT tabs.

    # This is a comment line - lines starting with # are ignored.
network:
  version: 2
  renderer: networkd
  ethernets:
    enp3s0:           # Here is where that interface name goes!
      dhcp4: true

Step 3: Run sudo netplan apply. Netplan will parse and apply the new config, including requesting a new dhcp address.

After this, your network should be up.

  • This config is for a server without GUI (networkd) using a wired ethernet (enp3s0) and dhcp. If you need a different configuration, check that page full of examples. What you want is probably in there.
user535733
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