Hi @joseaugustin,
User @nhan’s suggestion is a much easier approach. Assuming you do not have a router or switch available, you can use your smartphone to interconnect your machines as long as your smartphone supports Wifi Direct/Hotspot.
To do this: Make sure you have a SIM card in your phone > enable your phone’s hotspot > using your other machines, go to the Wi-Fi settings to find the name of your phone then connect.
Note: cabled connection still offers better performance than wireless network. in this case, you can use a switch and LAN cables to connect your machines.