After installing a new kernel on Ubuntu the interface could not be brought up because it did not exist anymore.
ip link add dev wg0 type wireguard
Error: Unknown device type.
After doing a modprobe it states the following error:
# modprobe wireguard modprobe: FATAL: Module wireguard not found in directory /lib/modules/5.0.4-2004
Checking dkms states it the wireguard module is active
# dkms status wireguard, 1.0.20200520, 5.3.0-1022-azure, x86_64: built
To fix this issue rebuild and install the module into the new kernel.
Make sure you install the linux-headers for your kernel!
# apt install linux-headers
Rebuilding the module (make sure to note the applicable wireguard version! This is returned by dkms status) In the example verison 1.0.20200520 is used:
# dkms status # dkms build wireguard/1.0.20200520 # dims install wireguard/1.0.20200520 # modprobe wireguard # wg-quick up wg0
Thats it!
Do you have an idea after this error:
root@raspberrypi:~# dkms status
wireguard, 1.0.20200908, 5.4.51+, armv7l: installed
wireguard, 1.0.20200908, 5.4.51-v7+, armv7l: installed
wireguard, 1.0.20200908, 5.4.51-v7l+, armv7l: installed
root@raspberrypi:~# dkms build wireguard/10.0.20200908
Error! Could not find module source directory.
Directory: /usr/src/wireguard-10.0.20200908 does not exist.
root@raspberrypi:~# dkms build wireguard/1.0.20200908
Error! echo
Your kernel headers for kernel 5.4.65-v7l+ cannot be found at
/lib/modules/5.4.65-v7l+/build or /lib/modules/5.4.65-v7l+/source.
Hi Maarten,
It seems you need to install linux-headers as these are needed to compile the module.