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Sudo apt-get install linux-headers-$(uname -r) build-essential dkms fails, but linux headers have been successfully installed using apt-get install at linux-headers-4.9.I bought a Wi-Fi USB dongle, EDIMAX EW-7811Un, which chip is rtl8188cu and the driver is compatible with rtl8192cu. One last thing, which may be a red herring, but nonetheless bears mentioning. The vendor has their own drivers they provide, but these do not want to compile, and seem a bit old (2018) and are just a repackaging of the realtek files used in the rtl8192cu which is part of the kernel. Can anyone advise as to the best course to take troubleshooting this further? I have worked my way through the Debian documentation for this interface and can confirm that sudo apt-get update & sudo apt-get install firmware-realtek runs without errors: firmware-realtek is already the newest version (0.43). I'm admittedly a bit mystified about what this error message means. Modprobe: ERROR: could not insert 'rtl8192cu': Operation not permitted

libkmod/libkmod-module.c:977 command_do() Error running install command for rtlwifi

However, when I try to load the driver, here's what I get: $ sudo modprobe rtl8192cu I am aware that there have been some persistent issues with bugs in this rtl8192cu driver, but it's my understanding that these have been resolved in more recent kernels. I can confirm that the device is connected via USB and recognised: $ lsusbīus 003 Device 006: ID 7392:7811 Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter īus 003 Device 005: ID 8087:07dc Intel Corp.īus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubīut the driver isn't loading, as per lsmod. I've been struggling to configure a USB dongle on my linux machine (running debian).