@Marcelo-Botelho, you don't need to use the computer_on_off.sh. That's a complicated scenario, so you should not start there.
You have two computers, and you're trying to use one computer to turn on the other computer, correct?
My video shows me using a Raspberry Pi to turn on my Windows computer, but you don't have to use a Raspberry Pi. If you have two Windows computers, you could use this utility instead:
https://www.nirsoft.net/utils/wake_on_lan.html
WakeMeOnLan.exe has a spanish version, and a GUI which can make it easy to test, then after you get that working, you can make a TRIGGERcmd command like this:
c:\tools\WakeMeOnLan.exe /wakeup 40-65-81-A7-16-23
This assumes you copied the WakeMeOnLan.exe utility into t:\tools and 40-65-81-A7-16-23 is the mac address of the nic in the computer you're turning on.
You can find the mac address by typing ipconfig /all on the computer you want to turn on. You'll get output like this:
Ethernet adapter Ethernet:
Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : **C4-65-26-2A-93-97**
...