I have a Galaxy S6 with a no command screen it won't reboot so I have my phone back. What can I do to reboot it?

[AC Question]

i have a galaxy s6 with a no command screen it wont reboot so i have my phone back

it says in yellow letters "Now send the package you want to apply to the device with "adb si deload <filename>" ...


what can i do to re boot it?