Connection activation failed when using establishing wifi connection

Connection activation failed when using establishing wifi connection

I am using NetworkManager on the command line to add wifi connections and use them.

I have had this working with no issues so far. However, I am on holiday and I brought my Rpi with me. I have tried to add their in-house wifi connection.
I can scan it and I can add it. But I cannot seem to start it. I get this error:

Error: Connection activation failed: No suitable device found for this connection (device eth0 not available because profile is not compatible with device (mismatching interface name)).

Using nmtui I can see the added connection as:

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Using ifconfig I can see:

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using sudo journalctl -fu NetworkManager (nd before it journalctl -u NetworkManager):

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Author: Andrew Simpson

Dual network interface control with systemd

On a debian machine, I have two network interfaces: eth1 and eth2.

Eth1 is static and eth2 is using dhcp. How to make so that when the eth1 interface is active, the eth2 interface is down and vice versa? Basically I want the two interfaces never to be active at the same time.
I’ve started to make a script with ifdown ifup in the crontab but obviously we should be able to do it with systemd.

Do you have any idea how to make this easy?

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Author: Rig0L

CentOS 8: Network Card disconnected on boot

Having an odd issue, just installed RockStore on a computer (CentOS based) and it is all running fine, but when the system boots the NIC is disabled.

I run nmcli device status and I can see the device is “disconnected”

If I then run nmcli con up DEVICEID the ethernet device connects fine, but if I reboot the system, the NIC is disabled again…

How can I force the card to connect automatically on boot?

Many thanks,


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Author: PsychoMo