[SOLVED] apt directory not found

[kas_27_es]

I'm trying to update my system using apt-get but it shows this error:

Code:

Reading package lists... Done
W: Unable to read /etc/apt/apt.conf.d/ - DirectoryExists (2: No such file or directory)
W: Unable to read /etc/apt/sources.list.d/ - DirectoryExists (2: No such file or directory)
W: Unable to read /etc/apt/sources.list - RealFileExists (2: No such file or directory)

What can I do?