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I Can't find any good manual/reference about BTX bootloader integrated into FreeBSD. Especially I would like to know:

  • if it's functionality resembles GRUB 2. For example, if it can boot OS other than FreeBSD
  • how to edit it's boot menu, what options are available
  • how to use it's command line ( I know there is help in command line, but it's very base )
  • how to 'troubleshoot'

Do you know any good resources ?

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up vote 3 down vote accepted

It looks like a pretty capable boot loader, but highly tailored around loading BSD kernels. Check out this doc file for some general descriptions of the different features. The boot menu and options are well detailed in the conf file man page. Command line usage and and general setup is covered in the main loader man page.

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