This guide walks through the steps necessary to run the peerswap plugin on bitcoin signet and liquid testnet. This guide was written and tested under Ubuntu-20.04 but the same procedure also applies to different linux distributions.
Peerswap requires clightning, bitcoind and if the liquid testnet should be used also an elementsd installation. If you already have all of these installed you can let them run in signet, or testnet mode and skip to the section about using the plugin.