Usually, I open the terminal with CTRL+ALT+T.
Then, the prompt says:
But after I opened a folder (doesn't matter, which one) with root privileges, even after that folder is closed again, I get the following prompt, when opening the terminal with the above keyboard shortcut.
How can I get back to the ordinary one automatically, after the folder, opened with root privileges, is closed and without rebooting, please?

I don't thinkwill work for you there but you could run a command to open new terminal or tab as user?

E.g: https://askubuntu.com/questions/7145...b-as-same-user or more searching? I used: add tab as another user terminal

What *exactly* (in maximum detail)
did you do
to "open a folder with root privileges"
?

I think that may reveal what is happening.

Did you run the `su` cli command?
Did you *log in* to the (whole) GUI as root?

I web-searched my quoted question & found this
https://forum.peppermintos.com/index.php?topic=5766.0
But I doubt if it's the same situation (it's obscure&convoluted)
But it may help you understand my question.

p.s. Oh, an idea: at that UNwanted root prompt:
su - <username>

Let us know....

@ GentleThotSeaMonkey
Here's what I did:
I booted into Kubuntu in the ordinary way and also logged in there with my ordinary username and the according password. It's btw. a single user system, so there's only me there.
When I did it the first time, I couldn't find a context option to "open a folder as root". I found that option in the settings of Dolphin, within the new services of Dolphin (as a download) and added that option accordingly. As a result the missing option was present, now.
Then I opened a root folder (*) using this added option. But each time I'm doing this, the terminal always opens with the root prompt, as mentioned above. So far, the only way to fix this is by rebooting Kubuntu.

(*) Rem.: I need this mainly during the configuration of a newly installed distro, to fix for example the launcher of the Easystroke tool (in /usr/share/applications), because I have to remove a switch there at the end of the Exec line to let Easystroke start minimized to tray, i.e. without showing its configuration window.

EDIT:
To reproduce this, do the following:
Hit CTRL+ALT+T to verify that the terminal is opening normally. Close it.

Go to /usr/share/application and open one of the launchers there with Kate (no need to edit anything there). Close Kate and this folder.

Hit the mentioned shortcut again.
You will probably notice, the terminal is opening differently now.

su - <username> does indeed work, but only for the currently opened terminal. As soon as I close the terminal and open it again, the root prompt is back.

Think you made it more confusing?

https://docs.xfce.org/xfce/thunar/custom-actions

@ jamison20000e
Please don't forget, this is about Kubuntu 21.04, which means, it's a KDE, not XFCE. Therefore, there's no Thunar and no custom actions in Kubuntu. Instead of that, there's Dolphin with some services available there. In its context menu, there is no option "Open as root", originally. I had to download and install this option as a new service.

EDIT: Sorry, I have to apologize for confusing Thunar with Dolphin in #4. Of course it is Dolphin. I fixed this mistake already in #4.

K. I figured you had just installed Thunar, as I often do.no 3rd or 4th parties needed...

Actually, I'd prefer Dolphin, which is the intended file manager for Kubuntu. If somebody has an idea, how to fix the problem with Dolphin, let me know, please.

I* can only assume this is the addon: ("Download New Services...":) https://store.kde.org/p/1384645/ KDE, especially *buntu will take us in many directions not planed by the operating systems "maintained" package manager.

I.e:So, I'm also assuming that for us to reproduce your error we'd need to install "run as root" from Dolphin's settings? (Not recommended. Nor do I *buntu. )

Opining one of those.desktop files "properly" as root, me:as kate:plus many other things I just tried have not reproduced minus your misuses...

Links I found searching:
http://www.timelessguru.com/easystroke
https://askubuntu.com/questions/6111...ser-privileges
not to waste, could help?

Indeed, it looks like the one, I installed, but I didn't get it from your link, but from the Dolphin settings->Configure Dolphin->Services->Download new services.
There are two versions available there, but the other one is meant for Plasma 4, but since Kubuntu 21.04 is using Plasma 5, I took the according one, of course.

This should be only a minor issue, if you create a Timeshift backup first, just for the very unlikely worst case.
Or maybe a virtual box installation of Kubuntu will do for such a test.

Not exactly sure about it, but currently, it looks like there's only the /usr/share/applications folder involved in this (got no idea, why!), because I just installed the Hibiscus home banking tool in Kubuntu manually, where I had to extract the program folder, called /jameica, from the downloaded zip and paste it into /opt.

Prior to this, I copied the ~/.jameica profile from a previously used Mint installation into my home folder of Kubuntu and then Hibiscus was instantly running perfectly.

To copy the extracted /jameica folder into /opt, I had to use the "Open as root" option of Dolphin.
But afterwards, testing the terminal again, there was still the ordinary user prompt.

Rem.: If anybody is confused about Jameica and Hibiscus, ... Jameica is sort of a JAVA platform and Hibiscus is a home banking plugin of Jameica.

EDIT:
Yes, I realized this, too, the other day.

After examining this issue for a few days now, finally, I also realized, I don't need an option to open Dolphin as root in Kubuntu.
Just edit a file as you wish, save it and if root, respectively its password, is needed, Kubuntu will ask you for it.

More and more, I'm coming to the conclusion, I better just uninstall that added service from Dolphin and everything will be fine.

Again, sorry, for my mistake about Thunar. Hopefully, nobody took it personally.

You will have to recompile dolphin and patch it. Or use slackware.
Unthinkable to deny root user access. Just nuts.

Attached Files

dolphin_revert_noroot.patch.txt (1.3 KB, 5 views)

I haven't used that setting in dolphin for sometime but remember it warning me from code to code ta know and trust the sources ourselves.

There's more than one way to kill a future timeline 🐝 or skin a flee for that matter?

https://askubuntu.com/questions/9906...olphin-as-root

I also wonder, why there's no such an option in Kubuntu. I know several other distros and all of them do have this option "open as root".
This means, all of these other distros ignore the mentioned security issues? Can't be so dangerous then, can it?

Microcoughed makes it harder to login as the administrator but I'm pretty sure you can open explorer as the admin from a user login; canonical knows better?

One problem with Linux is it goes in so many directions. Another only someone whould say, is it's become mainstream?

Android you have to root.