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How to debug wired/wireless Internet connection problems in Fedora ?

asked 2014-04-29 03:21:28 -0500

NickTux gravatar image

updated 2014-09-28 11:31:11 -0500

mether gravatar image

I have some problems with my Internet connection. Either is wired or wireless, doesn't work as it should. How can I debug the problem or what information I have to provide in a relevant question so the troubleshooters help me quickly and effectively ?

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answered 2014-04-29 03:40:06 -0500

NickTux gravatar image

updated 2014-04-29 03:46:19 -0500

In order for the problem to be resolved quickly and more effectively, you have to provide some info. I will use the terminal here because it's a lot of easier tool and more effective.

Open a terminal and execute the following commands one by one

cat /proc/version

will show the Fedora release and kernel version.

lspci -nnk | grep -iA2 net

will show us the Network and/or Ethernet controller with the model and ID.


in case it is a USB wireless adapter will show the moder and ID.


will show info about the wireless connection.


will show info about wired connection.

cat /var/lib/NetworkManager/NetworkManager.state

will show the NetworkManager.state file that contains some useful info.

cat /etc/resolv.conf

will show the resolv.conf file that contains useful info.

systemctl status NetworkManager

will show the status of Network Manger.

sudo journalctl _SYSTEMD_UNIT=NetworkManager.service > NetworkManager.txt

above command will create a text file named NetworkManager.txt that contains a lot of useful information about that service. Be aware that it will contain some data that can be considered as sensitive. Read the file before you post the contents. You can remove/omit IP address..etc when paste the contents of the file.

Above commands outputs will gain a lot of useful information that (at my opinion) are enough for someone to spot and (maybe) resolve the problem.

Tip: Because the lines probably will be a lot (hundreds maybe) it would be more helpful to collect the output of each command in a single text file and upload this file on Fedora Paste via fpaste command. For example I can gather the outputs in a file that I will name: internet-debug.txt and then run the command

fpaste internet-debug.txt

it will upload the file in Fedora Paste page and it will give me the URL in terminal. Then the only I have to do is to provide this URL.

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Asked: 2014-04-29 03:21:28 -0500

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Last updated: Apr 29 '14