Tips & Tricks with the kernel cmdline
=====================================

This document summarizes the different boot parameters that can be
passed on the Linux kernel command line.  Not limited to Finit.

The `bool` setting is one of `on, off, true false, 1, 0`.


* `debug`: Enable kernel debug.  Debug messages are printed to the
    console until Finit starts up.

* `finit.debug[=bool]`: Enable finit debug.  This is operated
	independently of the kernel debug setting.  New as of Finit v4.

* `finit.show_status[=bool]`: Control finit boot progress, including
  banner.

* `finit.status_style=<classic,modern>`: Set Finit boot progress style,
  when enabled.

* `init=/bin/sh`: Bypass system default init and tell kernel to start a
	shell.  Note, this shell is very limited and does not support
	signals and has no job control.  Recommend using, and modifying,
	`rescue` mode instead.

* `panic=SEC`: By default the kernel does not reboot after a kernel
    panic.  This setting will cause a kernel reboot after SEC seconds.

* `quiet`: Suppress kernel logging to console, except for warnings and
  errors.

* `rescue`: Start Finit rescue mode; no network, no `fsck` of file
    systems in `/etc/fstab`, no `/etc/rc.local`, no `runparts`.  The
    configuration is read from `/lib/finit/rescue.conf`, and can be
    modified by the operator.

* `single`, or `S`: Single user mode, runlevel 1, in Finit.  Useful to
    debug problems with the regular runlevel.  All services and TTYs in
    `[1]` will be started, so a `tty [1] @console nologin` configuration
    presents you with a root console without login.

For more on kernel boot paramaters, see the man page [bootparam(7)][].


[bootparam(7)]: https://www.man7.org/linux/man-pages/man7/bootparam.7.html