How to Install Realtek WiFi Driver in Debian Gnu/Linux Distro
GNU/Linux Debian Installing Realtek Wi-fi Driver Setup – Step-by-step Guide
Hi! The linked Tutorials shows you Step-by-Step How to Install Realtek Wireless Card Driver on Debian GNU/Linux.
And this Realtek WiFi Driver Debian Setup cover most of the available Models.
Most noteworthy: some Driver like rtl8187B, rtl8187L, rtl8188EE, rtl8188SU, rtl8191SU, rtl8192CE, rtl8192CU, rtl8192DE, rtl8192EE, rtl8192SE, rtl8192SU, rtl8723AE, rtl8723BE, and rtl8821AE, should be already provided by the Linux Kernel!