KDE no longer working

If your smartphone doesn’t connect any more with the PC, the problem could be <b>the firewall</b>.

To fix this, you can:

1.install gufw

2.Open gufw from app launcher
Go to the Rules tab
Click the [+] button to add a new rule
Select the direction “Both”
Select category “Network:
Select Application “KDE connect”
Click “Add”



It is an interesting android open source camera app, which allows you to control the smartphone camera in a very detailed way.

Unfortunately it hasn’t an easy graphical interface: therefore you should know that a) you can get settings sliding the screen (from left and from bottom); b) you must set an external storage, otherwise you won’t be able to take any photo.

android mail app

K9-Mail is a good app, but unfortunately rarely updated, in the last year. Besides, it has had an annoying cryptography bug and a notification bug.

So we tried FairEmail, that is definitely more accessorized, but not really privacy-friendly as they pretend, and not so open source: impossible to contact the developer, and pro functionalities are blocked until you pay something.

So, we went back to K9-Mail, that is absolutely open-source, even more “spartan”, but in its latest release without cryptography bug and notification bug.

split an epub per chapters

An epub book has multiple chapters. What method to split it into multiple files, each of them consist one chapter, effectively?

For example as the following:

1) Find: <h2

2) Replace: <hr class="sigil_split_marker" /><h2

3) Then select Edit > Split at markers.

true phone: the best android phone app

True Phone in my opinion is the best phone app: indeed without unnecessary special effects, it offers a remarkable range of features, including choosing the address books.

As an example, you can set davx (/nextcloud) as the main address book, instead of the google one.
Or you can view groups of contacts – which almost no other app does.

Obviously, you can set customized ringtone and sounds. Or easily modify contacts.

But there a lots of interesting features. It is undoubtedly worth trying.


To sync a PC with a smartphone (or any other android device, like an android e-reader or tablet) you can use abd, and abd-sync. This latter has the advantage that it can, unlike adb push --sync, delete files no more existing in source or create new folders.

Indeed adb push –sync can only update files and folder already existing.

a problem: the external card

You can sync not only the internal memory of your android device, but an external card as well. The problem might be find the extact name and path of your external card: so you can use adb shell, and then df and ls to see the folders our the whole device (including the external card) with its exact name, that you will be able to use afterward in adb / adb-sync.

But if you adb-sync keeping the external card into your device, because it is more convenient, you will find some problems, such as the symlinks (not considered).

So, you might try with krusader and a sync via mtp, but this is very slow.