RTL8821CU无线网卡（650M双频）linux驱动

----- #### Click [here](https://github.com/morrownr/USB-WiFi) for USB WiFi Adapter Information for Linux ----- #### A FAQ is available at the end of this document. ----- #### Problem reports go in `Issues`. Include the information obtained with: ``` sudo uname -a; mokutil --sb-state; lsusb; rfkill list all; dkms status; iw dev ``` ----- ## 8821cu ( 8821cu.ko ) :rocket: ## Linux Driver for USB WiFi Adapters that are based on the RTL8811CU, RTL8821CU and RTL8731AU Chipsets - v5.12.0 (Realtek) (20210118) plus updates from the Linux community - 1,300+ Views over the 2 weeks ended on 20220606 (Thank you!) ### Features - IEEE 802.11 b/g/n/ac WiFi compliant - 802.1x, WEP, WPA TKIP and WPA2 AES/Mixed mode for PSK and TLS (Radius) - WPA3 (see FAQ) - IEEE 802.11b/g/n/ac Client mode * Supports wireless security for WEP, WPA TKIP and WPA2 AES PSK * Supports site survey scan and manual connect * Supports WPA/WPA2 TLS client - Power saving modes - Wireshark compatible - Aircrack-ng compatible - Packet injection - hostapd compatible - AP mode DFS channel support - Miracast - Supported interface modes * IBSS * Managed * Monitor * AP * P2P-client * P2P-GO * Concurrent (see `Concurrent_Mode.md` in the `docs` folder.) - Log level control - LED control - Power saving control - VHT control (allows 80 MHz channel width in AP mode) - AP mode DFS channel control ### Compatible CPUs - x86, amd64 - ARM, ARM64 ### Compatible Kernels - Kernels: 4.19 - 5.11 (Realtek) - Kernels: 5.12 - 5.18 (community support) ### Tested Linux Distributions Note: One of the goals of this project is to provide driver support that is easy to install and works reliably on many distros. Meeting this goal depends on you to report your recommendations and updated information. If you see information that needs to be updated, please report the updated information and if you do not see adequate support for items such as Installation Steps 2, 3 and 9, and you know what updates need to added or you can get that information, please provide it so that the Installation Steps can be improved. - Arch Linux (kernels 5.4 and 5.11) - Fedora (kernel 5.11) - Debian 11 (kernels 5.10 and 5.15) - Kali Linux (kernel 5.10) - Linux Mint 20.2 (Linux Mint based on Ubuntu) (kernels 5.4 and 5.13) - LMDE 4 (Linux Mint based on Debian) (kernel 4.19) - Manjaro 20.1 (kernel 5.9) and 21.1 (kernel 5.13) - openSUSE Tumbleweed (rolling) (kernel 5.15) - Raspberry Pi OS (2022-04-04) (ARM 32 bit and 64 bit) (kernel 5.15) - Raspberry Pi Desktop (x86 32 bit) (kernel 4.19) - Solus - Ubuntu 20.xx (kernels 5.4 and 5.8 and 5.13) - Ubuntu 22.04 (kernel 5.15) ### Download Locations for Tested Linux Distributions - [Arch Linux](https://www.archlinux.org) - [Debian](https://www.debian.org/) - [Fedora](https://getfedora.org) - [Kali Linux](https://www.kali.org/) - [Linux Mint](https://www.linuxmint.com) - [Manjaro](https://manjaro.org) - [openSUSE](https://www.opensuse.org/) - [Raspberry Pi OS](https://www.raspberrypi.org) - [Solus](https://getsol.us/home/) - [Ubuntu](https://www.ubuntu.com) ### Tested Hardware - [EDUP EP-AC1651 USB WiFi Adapter AC650 Dual Band USB 2.0 Nano](https://www.amazon.com/gp/product/B0872VF2D8) - [EDUP EP-AC1635 USB WiFi Adapter AC600 Dual Band USB 2.0](https://www.amazon.com/gp/product/B075R7BFV2) ### Compatible Devices * Cudy WU700 * BrosTrend AC5L * EDUP EP-AC1651 * EDUP EP-AC1635 * TOTOLINK A650UA v3 * Mercusys MU6H (multi-state) * Numerous additional products that are based on the supported chipsets Note: Please read "supported-device-IDs" for information about how to confirm the correct driver for your adapter. ### Installation Information Warning: Installing multiple drivers for the same hardware usually does not end well. If a previous attempt to install this driver failed or if you have previously installed another driver for chipsets supported by this driver, you MUST remove anything that the previous attempt installed BEFORE attempting to install this driver. This driver can be removed with the script called `./remove-driver.sh`. Information is available in the section called `Removal of the Driver.` You can get a good idea as to whether you need to remove a previously installed driver by running the following command: ``` sudo dkms status ``` The installation instructions are for the novice user. Experienced users are welcome to alter the installation to meet their needs. Temporary internet access is required for installation. There are numerous ways to enable temporary internet access depending on your hardware and situation. [One method is to use tethering from a phone.](https://www.makeuseof.com/tag/how-to-tether-your-smartphone-in-linux). Another method is to keep a [WiFi adapter that uses an in-kernel driver](https://github.com/morrownr/USB-WiFi) in your toolkit. You will need to use the terminal interface. The quick way to open a terminal: Ctrl+Alt+T (hold down on the Ctrl and Alt keys then press the T key). An alternative terminal is to use SSH (Secure Shell) from the same or from another computer, in which case you will be in a suitable terminal after logging in, but this step requires that an SSH daemon/server has already been configured. (There are lots of SSH guides available, e.g., for the [Raspberry Pi](https://www.raspberrypi.com/documentation/computers/remote-access.html#setting-up-an-ssh-server) and for [Ubuntu](https://linuxconfig.org/ubuntu-20-04-ssh-server). Do not forget [to secure the SSH server](https://www.howtogeek.com/443156/the-best-ways-to-secure-your-ssh-server/).) You will need to have sufficient access rights to use `sudo` so that commands can be executed as the `root` user. (If the command `sudo echo Yes` returns "Yes", with or without having to enter your password, you do have sufficient access rights.) DKMS is used for the installation. DKMS is a system utility which will automatically recompile and reinstall this driver when a new kernel is installed. DKMS is provided by and maintained by Dell. It is recommended that you do not delete the driver directory after installation as the directory contains information and scripts that you may need in the future. There is no need to disable Secure Mode to install this driver. If Secure Mode is properly setup on your system, this installation will support it. ### Installation Steps #### Step 1: Open a terminal (e.g. Ctrl+Alt+T) #### Step 2: Update and upgrade system packages (select the option for the OS you are using) Note: If your Linux distro does not fall into one of options listed below, you will need to research how to update and upgrade your system packages. - Option for Debian based distributions such as Ubuntu, Linux Mint, Kali and Raspberry Pi OS ``` sudo apt update && sudo apt upgrade ``` - Option for Arch based distributions such as Manjaro ``` sudo pacman -Syu ``` - Option for Fedora based distributions ``` sudo dnf upgrade ``` - Option for openSUSE based distributions ``` sudo zypper update ``` Note: It is recommended that you reboot your system at this point. The rest of the installation will appreciate having a fully up to date system to work with. The installation can then be continued with Step 3. ``` sudo reboot ``` #### Step 3: Install the required packages (select the option for the OS you are using) - Option for Raspberry Pi OS (ARM/ARM64), for Raspberry Pi Desktop (x86) see below ``` sudo apt install -y raspberrypi-kernel-headers bc build-essential dkms git ``` - Option for Debian, Kali, Linux Mint Debian Edition (LMDE) and Raspberry Pi Desktop (x86) ``` sudo apt install -y linux-headers-$(uname -r) build-essential dkms git libelf-dev ``` - Option for Ubuntu (all flavors) and Linux Mint ``` sudo apt install -y dkms git build-essential ``` - Option for Fedora ``` sudo dnf -y install git dkms kernel-devel kernel-debug-devel ``` - Option for openSUSE ``` sudo zypper install -t pattern devel_kernel dkms ``` - Option for