Error when installing/uninstalling with apt-get.

[ajgreeny]

Thanks CW.

[theasdas]

Ok, so I believe I know what might be the problem. I tried the corrected command in the console, and I got the following error messages:

E: No se ha podido localizar el paquete nvidiabl-dkms_0.87_all.deb
E: No se pudo encontrar ningún paquete usando «*» con «nvidiabl-dkms_0.87_all.deb»
E: No se pudo encontrar ningún paquete con la expresión regular «nvidiabl-dkms_0.87_all.deb»

Translating it from spanish, it basically says it cannot find the "nvidiabl-dkms_0.87_all.deb" package.
That is weird, because when I do "apt list --installed | grep nvidia", I get the following result:

nvidia-340-updates/focal,now 340.108-0ubuntu2 amd64 [instalado]
nvidia-340/focal,now 340.108-0ubuntu2 amd64 [instalado]
nvidia-opencl-icd-340/focal,now 340.108-0ubuntu2 amd64 [instalado, automático]
nvidia-settings/focal-updates,now 440.82-0ubuntu0.20.04.1 amd64 [instalado, automático]
nvidiabl-dkms/now 0.87 all [instalado, local]

I believe that the system believes that the package is installed, but cannot find it.
Any idea how to solve this?