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improve Secure Boot support
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FAQ.md
82
FAQ.md
@ -44,43 +44,46 @@ Answer: This [article](https://null-byte.wonderhowto.com/forum/wifi-hacking-atta
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-----
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Secure Boot Information
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Question: The driver installation script completed successfully and the
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driver is installed but does not seem to be working. What is wrong?
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Answer: Turn secure boot off to see if that allows the driver to work.
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This driver is primarily tested on Debian based distros such as Ubuntu,
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Raspberry Pi OS and Kali. In an attempt to make this driver work well on
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many Linux distros, other distros, including the Arch based Manjaro is
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used for testing. Currently I do not have installations of Fedora or
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OpenSUSE available for testing and reply on user reports of success or
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failure. I have two test systems with secure boot on so as to test secure
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boot. I have not seen any secure boot problems with Debian based systems
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and I don't remember problems with Manjaro.
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Answer: This question often comes up after installing the driver to a
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system that has Secure Boot on. To test if there is a Secure Boot related
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problem, turn secure boot off in the system BIOS and reboot. If the driver
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works as expected after reboot, them the problem is likely related to
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Secure Boot.
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dkms is used in the installation script. It helps with a lot of issues that
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will come up if a simple manual installation is used. dkms has the
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capability to handle the needs of secure boot. dkms was written by and is
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maintained by Dell. Dell has been offering some Ubuntu pre-loaded systems
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for years so their devs likely test on Ubuntu. I suspect Fedora and
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OpenSUSE may be handing their secure boot support differently than Debian
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based systems and this is leading to problems. This and the other repos
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I have are VERY heavily used and I am sure there are plenty of non-Debian
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users that use this driver. Are they all turning off secure boot and not
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reporting the problem? I don't know. What I do know is that reports like
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this are rare.
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What will increase my chances of having a sucessessful installation on a
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system that has Secure Boot on?
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For the driver to compile and install correctly but not be available
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tells me there is likely a key issue. Here is an interesting link
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regarding Debian systems and secure boot:
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First and foremost, make sure Secure Boot is on when you initially install
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your Linux distro. If your Linux distro was installed with Secure Boot off,
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the easiest solution is likely to do a clean reinstallation with Secure Boot
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on.
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Ubuntu is used as the example but other distros should be similar to one
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degree or another. During the installation there will be a box on one of
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installation pages that will appear if the installation program detects
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that Secure Boot is on. You will need to check the box and supply a
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password. You can use the same password and you use for the system if you
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wish. After the installation and reboot completes, the first screen you
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should see is the mokutil screen. Mokutil will guide you through the
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process of setting up your system to support Secure Boot
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The `install-driver.sh` script currently supports Secure Boot if `dkms`
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is installed. Here is a link to the `dkms` website. There is information
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regarding Secure Boot in two sections in the `README`.
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https://github.com/dell/dkms
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Here is a link regarding Debian and Secure Boot:
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https://wiki.debian.org/SecureBoot
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That document contains a lot of information that can help an investigation
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into what the real problem is and I invite you and other Fedora, OpemSUSE
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and users of other distros that show this problem to investigate and
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present what you know to the devs of your distro via their problem
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reporting system. Turning off secure boot is NOT a fix. A real fix needs
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to happen.
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There is work underway to add Secure Boot suuport for systems that do not
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have `dkms` available or if a manual installation is desired.
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-----
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@ -90,22 +93,23 @@ Answer: I have a repo that is setup to help with monitor mode:
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https://github.com/morrownr/Monitor_Mode
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Work to improve monitor mode is ongoing with this driver. Your
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reports of success or failure are needed. If you have yet to buy an
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adapter to use with monitor mode, there are adapters available that are
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known to work very well with monitor mode. My recommendation for those
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looking to buy an adapter for monitor mode is to buy adapters based on
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the following chipsets: mt7921au, mt7612u, mt7610u, rtl8812au, rtl8821cu and
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rtl8811au. My specific recommendations for adapters in order of
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preference are:
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Work to improve monitor mode is ongoing with this driver. Your reports of
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success or failure are needed. If you have yet to buy an adapter to use with
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monitor mode, there are adapters available that are known to work very well
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with monitor mode. My recommendation for those looking to buy an adapter for
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monitor mode is to buy adapters based on the following chipsets: mt7921au,
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mt7612u, mt7610u, rtl8821cu, rtl8812bu, rtl8812au, and rtl8811au. My specific
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recommendations for adapters in order of preference currently are:
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ALFA AWUS036ACHM - long range - in-kernel driver
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ALFA AWUS036ACM - in-kernel driver
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ALFA AWUS036ACH - long range - [driver](https://github.com/morrownr/8812au-20210629)
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ALFA AWUS036ACU - in-kernel driver (as of kernel 6.2) and [out-of-kernel driver](https://github.com/morrownr/8821cu)
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ALFA AWUS036ACS - [driver](https://github.com/morrownr/8821au-20210708)
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ALFA AWUS036ACH - long range - [driver](https://github.com/morrownr/8812au)
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ALFA AWUS036ACS - [driver](https://github.com/morrownr/8821au)
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To ask questions, go to [USB-WiFi](https://github.com/morrownr/USB-WiFi)
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and post in `Discussions` or `Issues`.
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7
Makefile
7
Makefile
@ -2511,6 +2511,13 @@ uninstall:
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rm -f $(MODDESTDIR)$(MODULE_NAME).ko
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/sbin/depmod -a ${KVER}
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sign:
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@openssl req -new -x509 -newkey rsa:2048 -keyout MOK.priv -outform DER -out MOK.der -nodes -days 36500 -subj "/CN=Custom MOK/"
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@mokutil --import MOK.der
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@$(KSRC)/scripts/sign-file sha256 MOK.priv MOK.der 8821cu.ko
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sign-install: all sign install
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backup_rtlwifi:
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@echo "Making backup rtlwifi drivers"
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ifneq (,$(wildcard $(STAGINGMODDIR)/rtl*))
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44
README.md
44
README.md
@ -46,9 +46,9 @@ confirm that this is the correct driver for your adapter.
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- hcxdumptool
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### A FAQ is available in this repo with the name FAQ.md
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### A FAQ is available in this repo with the name `FAQ.md`
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- Please read the FAQ and below documentation before posting issues.
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- Please read the FAQ and this document before posting issues.
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### Additional documentation is in the file `8821cu.conf`
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@ -147,7 +147,7 @@ sudo dkms status
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```
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Warning: If you decide to upgrade to a new version of kernel such as
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5.15 to 5.19, you need to upgrade the driver you have installed with
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5.15 to 6.1, you need to upgrade the driver you have installed with
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the newest available before installing the new kernel. Use the
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following commands in the driver directory:
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@ -185,25 +185,7 @@ It is recommended that you do not delete the driver directory after
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installation as the directory contains information and scripts that you
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may need in the future.
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Secure Boot: The installation script, `install-driver.sh`, will
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automatically support secure boot... if your distro supports the method
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dkms uses. I regularly test the installation script on systems with
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secure boot on. It works seemlessly on modern Ubuntu based distros as
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long as secure boot was set up properly during the installation of the
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operating system. Some distros, such as the Raspberry Pi OS, do not
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support secure boot because the hardware they support does not support
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secure boot making it unnecessary to attempt to support it. There are
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distros that may require additional steps to sign the driver for secure
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boot operation. Fedora is an example. In installation Step 3, note that
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`openssl` must be installed as Fedora does not install it by default.
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There will also be another step for Fedora after `install-driver.sh`
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script is completed. This will be explained in the instructions at the
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appropriate time. Overall, secure boot requires that
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`openssl` and `mokutil` be installed and that additional steps be
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performed if necessary. To test if secure boot is the problem: If you
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install this driver and, after a reboot, the driver is not working, you
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can go into the BIOS and temporarily turn secure boot off to see if
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secure boot is the problem.
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Secure Boot: see FAQ.
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### Installation Steps
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@ -216,7 +198,7 @@ on a best effort basis, based on the steps below.
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#### Step 2: Update and upgrade system packages (select the option for the distro you are using)
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Note: If your Linux distro does not fall into one of options listed
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below, you will need to research how to update and upgrade your system
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below, you will need to research how to `update` and `upgrade` your system
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packages.
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- Option for Debian based distributions such as Ubuntu, Kali, Armbian and Raspberry Pi OS
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@ -261,7 +243,17 @@ sudo reboot
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Note: If your Linux distro does not fall into one of options listed
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below, you will need to research how to properly setup up the development
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environment for your system.
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environment for your system. General guidance is given the next paragraph.
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Development Environment Requirements: (package names may vary by distro)
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- Mandatory: `gcc` `make` `bc` `kernel-headers` `build-essential` `git`
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- Highly recommended: `dkms` `rfkill` `iw` `ip`
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- Mandatory if Secure Boot is active: `openssl` `mokutil`
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Note: The below options should take care of the mandatory and highly recommended
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requirements but only you know if Secure Boot is active. If Secure Boot is
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active on your system, please also install the mandatory packages for Secure Boot.
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- Option for Armbian (arm64)
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@ -289,10 +281,8 @@ sudo apt install -y build-essential dkms git iw
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- Option for Fedora
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Note: Installing `openssl` is only necessary for secure boot support.
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```
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sudo dnf -y install git dkms kernel-devel openssl
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sudo dnf -y install git dkms kernel-devel
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```
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- Option for openSUSE
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