It is stated that KDE has a group name of netdev.
No, that is not what is stated, it states "1. Ensure your user account is a member of the netdev group."
So, step 1 is to make sure (ensure) that your user is a member of the netdev group.
You didn't do that.
I don't understand how you could expect any tutorial to work when you don't even follow the first step. I don't know if it would help in this case but it generally isn't a good idea to skip steps when trying to follow a tutorial.
You made this statement.
margaretH wrote:I did recently switch to KDE from gdm3 and have trimmed 'deleted non essential packages' gdm3 down to bare essentials and still use the wify for updating the system software.
I wonder how you decided what the "bare essentials" were and what all you "deleted".
I will mention that on a Wheezy system my user is a member of the netdev group even though I use Gnome on it. I don't know why yours is different.
I wonder if English is not your first language as I have difficulty understanding the statement in your previous post. How does,
margaretH wrote:"i need to go through gnome gui conf files or write some scripts with the network manager and cmd line tools"
, relate to the question you are asking about using WiFi on KDE?
The question that bw123 asked, "The link to wifi how to use is a pretty good one, how far did you get", seems reasonable to me. I'm pretty sure what bw123 meant was for you to detail, exactly, the steps you followed and what the results were. That is a method for troubleshooting, to see where any mistakes have happened. Perhaps the reason that that you didn't get "any where" [sic] is that you didn't follow the first step.
If English isn't your first language, perhaps going through the steps of the tutorial one at a time as I think bw123 was suggesting and making sure you followed them correctly would be helpful and give you a chance to ask about anything you aren't sure of.