Something’s not right. There shouldn’t be a deck-tailscale.sh file. There’s supposed to be a directory named deck-tailscale and a tailscale.sh and some other files inside it.

Here’s what you do. First, open a terminal like Konsole. Then run these commands:

git clone https://github.com/tailscale-dev/deck-tailscale
cd deck-tailscale
sudo bash tailscale.sh