Semi-Desperate Please for Help with Linux Ethernet Configuration

[Gary Mikitin, AF8A]

I'll spare everyone the details, bit at the last minute I, a non-fluent Linux person, has been called upon to change a PC running  WSPRDaemon (I think the OS is a version of Debian, but I am only about 60% sure of that) from a wifi to wired Ethernet connection to the Web.

This is one of HamSCI's DASI2 installations.

The BeeLink machine does not have a GUI running - only command line interface.

I'm guessing I'll be connecting to a router running DHCP...that's the extent of my knowledge of the LAN.

If anyone has advice (and quickly, as I'm supposed to do the switch Friday afternoon, Eastern time) or suggestions as to a good tutorial on the Web, I'd appreciate hearing from you.

Tnx es 73 de Gary, AF8A

[Bill Blackwell]

Here’s what Dr. A-I says to the query: “debian command line change from a wifi to wired Ethernet connection.”
73 Bill, AB1XB

To switch from a Wi-Fi connection to a wired Ethernet connection on Debian from the command line, follow these steps: Identify your network interfaces.

 

Use ip a or ifconfig to list your network interfaces and identify your wireless interface (e.g., wlan0, wlpXsY) and your wired Ethernet interface (e.g., eth0, enpXsY). Disable the Wi-Fi connection.

 

If you are using NetworkManager, you can disable Wi-Fi with:

 

sudo nmcli radio wifi off

 

Alternatively, you can bring down the wireless interface directly (replace wlan0 with your actual wireless interface name):

 

sudo ip link set wlan0 down

 

Enable the wired Ethernet connection.

 

If your Ethernet interface is configured for DHCP, you can bring it up and request an IP address (replace eth0 with your actual Ethernet interface name):

 

sudo ip link set eth0 up     sudo dhclient eth0

 

If you are using NetworkManager and have a configured wired connection, you can activate it:

 

sudo nmcli connection up "Your_Wired_Connection_Name"

 

(You can find connection names with nmcli connection show) Verify the connection.

 

Check your IP address and network connectivity:

 

ip a show eth0     ping -c 4 google.com

 

Note: For persistent changes across reboots, you may need to modify /etc/network/interfaces or configure NetworkManager settings to prioritize the Ethernet connection.

 

AI responses may include mistakes.

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[Gary Mikitin, AF8A]

Many thanks, Bill.  I did find details on modifying the ‘interfaces’ file, so I am aware if that becomes necessary.  N2BP offered a lifeline if I get stuck.

I will bring my squishy ‘stress brain’ in case I need to take my frustrations out on something.

73 - Gary

[David Hostetler]

Be aware that some of the commands in Bill's AI response aren't persistent over a reboot.

I am no expert in Linux of any sort, but while browsing just now for an answer, I think that I understand that most of the time if you plug in ethernet, it will just work. But I did see a couple of notes about wanting to prioritize Ethernet over WiFi, including one where a college prof. had weak WiFi in his office that his computer used instead of switching to Ethernet when he plugged in a cable. Google's AI that comes up as the first answer when browsing with Chrome seems to think that Ethernet is prioritized over WiFi and suggests that if the opposite is true, it may be due to misconfiguration of the computer. 

Good luck on your trip tomorrow.

HamSCI is an organization that was started by people who are both hams and professional scientists with the goal of bringing both communities together.

 
Please adhere to the following guidelines when using HamSCI: http://hamsci.org/hamsci-community-participation-guidelines
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[David Witten]

Gary,

Sorry that I didn't respond to this earlier.  It looks like you have gotten good advice from Bill and David.  

I had an early encounter with my dentist/oral surgeon and needed a long nap before I gave anyone advice on anything.

I will be building a fairly parallel setup tomorrow for testing new magnetometer code and will probably be going through many of the same steps.

I often use 'nmtui' - a ncurses command line app that lets you configure most of what it seems you want.  I can't remember whether it is available by default on Debian 13 or whether there is a package you have to add first with apt. I find it really helpful in 'headless' situations. It is still a bit kludgy - like most curses/ncurses commands.  But it is a bit more visual and much of what you need is in one place.

Daave Witten, KD0EAG

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