1 .\" Copyright (c) 2002 Gordon Tetlow
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32 .Nd "specify an alternate kernel and boot flags for the next reboot"
35 .Op Fl e Ar variable=value
44 utility allows specifying some combination of an alternate kernel, boot flags
45 and kernel environment for the
46 next time the machine is booted.
49 loads in the new kernel
50 information, it is deleted so in case the new kernel hangs the machine,
51 once it is rebooted, the machine will automatically revert to its previous
54 The options are as follows:
55 .Bl -tag -width ".Fl o Ar options"
60 option removes an existing
63 .It Fl e Ar variable=value
64 This option adds the provided variable and value to the kernel environment.
65 The value is quoted when written to the
70 option disables the sanity checking which checks if the kernel really exists
75 This option specifies a kernel directory relative to
77 to load the kernel and any modules from.
80 allows the passing of kernel flags for the next boot.
83 .Bl -tag -width ".Pa /boot/nextboot.conf" -compact
84 .It Pa /boot/nextboot.conf
85 The configuration file that the
87 configuration is written into.
96 .Dl "nextboot -k GENERIC"
98 To enable into single user mode with the normal kernel:
100 .Dl "nextboot -o ""-s"" -k kernel"
102 To remove an existing nextboot configuration:
111 manual page first appeared in
113 It used a very different interface to achieve similar results.
115 The current incarnation of
120 This manual page was written by
121 .An Gordon Tetlow Aq gordon@FreeBSD.org .
125 code is implemented in the
127 It is not the most throughly tested code.
128 It is also my first attempt to write in Forth.
130 Finally, it does some evil things like writing to the file system before it
132 If it scrambles your file system, do not blame me.