Help please...
hi,i am a newbie in linux.I have installed kali linux(kde plasma 2019 oct version)And i tried almost everything i found in internet but still i am unable to use fingerprint to login my laptop.I tried to install fingerprint-gui using ppa repository but i am getting an error saying

W: GPG error: http://ppa.launchpad.net/fingerprint...int-gui/ubuntu oneiric Release: The following signatures were invalid: 8141A328E64AC6C85D337D03EFD5FA852F20733F E: The repository 'http://ppa.launchpad.net/fingerprint/fingerprint-gui/ubuntu oneiric Release' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.

Even i tried by clonig git of fingerprint-gui from github...but there as well i am getting error while giving make cmd which says like,

cd bin/ && make -f Makefile make[1]: Entering directory '/root/Softwares/2fingerprint-gui/bin' cd fingerprint-gui/ && make -f Makefile make[2]: Entering directory '/root/Softwares/2fingerprint-gui/bin/fingerprint-gui' g++ -c -m64 -pipe -fno-strict-aliasing -O2 -D_REENTRANT -Wall -W -DLIBEXECDIR="/usr/local/lib/fingerprint-gui" -DQT_NO_DEBUG -DQT_XML_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtXml -I/usr/include/qt4 -I. -I../../include -I../../upek/include -I. -I. -o MainWindowImpl.o ../../src/MainWindowImpl.cpp In file included from ../../src/MainWindowImpl.cpp:46: ../../src/../include/UserSettings.h:30:10: fatal error: QtCrypto: No such file or directory 30 | #include | ^~~~~~~~~~ compilation terminated. make[2]: * [Makefile:475: MainWindowImpl.o] Error 1 make[2]: Leaving directory '/root/Softwares/2fingerprint-gui/bin/fingerprint-gui' make[1]: * [Makefile:45: sub-fingerprint-gui-make_default] Error 2 make[1]: Leaving directory '/root/Softwares/2fingerprint-gui/bin' make: *** [Makefile:39: sub-bin-make_default] Error 2

I just want to use my in buitlt fingerprint feature...isn't there any other fingerprint managing tools in official kali repository...or could anyone please help me with any other alternative solution??

If you're new to Linux, then Kali is the worst choice of distribution.

You are trying to use software repositories meant for Ubuntu, with the very error messages you have posted plainly telling you that Kali does NOT support such third party repositories. And you really wonder why you are having problems ?

And on top of that, you've tried to build "fingerprint-gui" from source where you clearly don't have the required dependencies/development packages installed.

Here's an "alternative solution": use Ubuntu instead if you want to install something from Ubuntu's software repo's - you can also install all of the tools you would find in Kali in Ubuntu itself, and here's how.

Also read this while you're at it.

1 members found this post helpful.

The two statements contradict each other. From the documentation:
There are installation options that allow you to install unsigned software. As stated above, this is risky. Did you check the apt-secure man page?
Looks like some prerequisite is missing. Please format the output so that it becomes readable.
Since Kali is Debian-based, I would search for fingerprint reader software in the Debian repos.