Instructions to setup wireguard on Raspberry pi 2/3 and get it working with streisand

WireGuard on OSMC RBP3

# Install repo

echo "deb http://deb.debian.org/debian/ unstable main" > /etc/apt/sources.list.d/unstable-wireguard.list
printf 'Package: *\nPin: release a=unstable\nPin-Priority: 150\n' > /etc/apt/preferences.d/limit-unstable
apt update

#unstall kernel sources headers (not sure if need both)
apt install libmnl-dev rbp2-headers-$(uname -r) rbp2-source-$(uname -r) build-essential pkg-config 

#ln the build dir to kernel headers
ln /usr/src/rbp2-headers-`uname -r` /lib/modules/`uname -r`/build

#install iproute2
apt install iproute2 resolvconf

#install wireguard
apt install wireguard-dkms wireguard-tools

#follow streisand instructions

Download the client configuration file: (for your setup)
Set permissions on the client configuration file:
sudo chown -v root:root ~/Downloads/wg0-client.conf; sudo chmod -v 600 ~/Downloads/wg0-client.conf

Move the client configuration file into the correct directory:
sudo mv -i -v ~/Downloads/wg0-client.conf /etc/wireguard/

Use the wg-quick utility to bring up the WireGuard interface:
sudo wg-quick up wg0-client

For Linux systems using systemd you can also enable Wireguard at boot: (didn't work for me - installed but wouldnt bring up interface)
'sudo systemctl enable wg-quick@wg0-client.service'

To stop routing your traffic through WireGuard, simply bring the interface back down:
sudo wg-quick down wg0-client

Pi:/home/osmc# ln /usr/src/rbp2-headers-uname -r /lib/modules/uname -r/build
ln: /usr/src/rbp2-headers-5.10.78-7-osmc: hard link not allowed for directory

How can I resolve this?

Hi,

Been a long while since I've used this, but try:
ln -s /usr/src/rbp2-headers-uname -r /lib/modules/uname -r/build