I use Torrents often, so I need to know how to make my computer start up and shut down automatically, Wi-Fi is switched on at six in the morning in my hotel and switched off at two AM. (I am able to schedule torrents, that's not a problem), I don't want my computer always plugged in to a power supply.
Power Management – Schedule Startup and Shutdown
power-managementscheduleshutdown
Best Answer
For a one-time shutdown you can use
To schedule it you can use cron. There are some GUIs for it like gnome-schedule.
But to start machine on schedule you have to look at BIOS/UEFI settings.
Update: check the answers about MythTV and Wake on Plan below to schedule startup.