deb http://ftp.us.debian.org/debian/ wheezy main contrib non-free deb-src http://ftp.us.debian.org/debian/ wheezy main contrib non-free deb http://security.debian.org/ wheezy/updates main contrib non-free deb-src http://security.debian.org/ wheezy/updates main contrib non-free
apt-cache search realtek nictools-pci - Diagnostic tools for many PCI ethernet cards flashrom - Identify, read, write, erase, and verify BIOS/ROM/flash chips firmware-realtek - Binary firmware for Realtek wired and wireless network adapters
apt-get install firmware-realtek Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: firmware-realtek 0 upgraded, 1 newly installed, 0 to remove and 615 not upgraded. Need to get 215 kB of archives. After this operation, 493 kB of additional disk space will be used. WARNING: The following packages cannot be authenticated! firmware-realtek Install these packages without verification [y/N]?