this post was submitted on 27 Jun 2024
929 points (96.7% liked)

linuxmemes

20880 readers
6 users here now

I use Arch btw


Sister communities:

Community rules

  1. Follow the site-wide rules and code of conduct
  2. Be civil
  3. Post Linux-related content
  4. No recent reposts

Please report posts and comments that break these rules!

founded 1 year ago
MODERATORS
 

Context for newbies: Linux refers to network adapters (wifi cards, ethernet cards, etc.) by so called "interfaces". For the longest time, the interface names were assigned based on the type of device and the order in which the system discovered it. So, eth0, eth1, wlan0, and wwan0 are all possible interface names. This, however, can be an issue: "the order in which the system discovered it" is not deterministic, which means hardware can switch interface names across reboots. This can be a real issue for things like servers that rely on interface names staying the same.

The solution to this issue is to assign custom names based on MAC address. The MAC address is hardcoded into the network adaptor, and will not change. (There are other ways to do this as well, such as setting udev rules).

Redhat, however, found this solution too simple and instead devised their own scheme for assigning network interface names. It fails at solving the problem it was created to solve while making it much harder to type and remember interface names.

To disable predictable interface naming and switch back to the old scheme, add net.ifnames=0 and biosdevname=0 to your boot paramets.

The template for this meme is called "stop doing math".

you are viewing a single comment's thread
view the rest of the comments
[โ€“] [email protected] 20 points 5 months ago* (last edited 5 months ago) (1 children)

Here I am on a laptop with no ethernet ports (probably works over USB-C? No idea, haven't tried), and a single wifi adapter. Guess I'll give it a try:

ip link show

What I expected

wlan0

What I got

wlp242s0

Neat ๐Ÿ‘ ๐Ÿ˜Ž ๐Ÿ‘

[โ€“] derpgon 9 points 5 months ago

enp2s0, wlp3s0, and my fav enp4s0f3u1u3