lilo.conf.5

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and \fIboot-menu.b\fP, with
.I boot.b
a symbolic link to the latter. Both boot loaders allow the entry
of kernel command line options in exactly the same fashion. Both also have full
serial line support (see \fBserial=\fP below), although no menu
capabilities are available
on the serial terminal. The former is
available for strict compatibility with previous versions of LILO.
If `install' is omitted,
.I /boot/boot.b
is used as the default.

Beginning with version 22, a third user-interface, \fIboot-bmp.b\fP, is
available. This presents a GUI interface, the background for which is
selected with "bitmap=". 

(Version 22.3): The selection of the
user interface with "install=" is dependent upon the presence of the
substrings "text", "menu", or "bmp" in the parameter to the "install=". The
boot loaders selected are no longer files, but are contained within the
boot-installer binary \fI/sbin/lilo\fP. If "install=" is omitted, the
default boot loader is "menu", unless "bitmap=" is specified (see above), in
which case the boot loader "bmp" will be selected.
.TP
.BI "large-memory"
(Version 22.3):
Normally any initial ramdisk (initrd) loaded with a kernel is loaded as
high in memory as possible, but never above 15Mb.  This is due to a BIOS
limitation on older systems.  On newer systems, this option enables using
memory above 15Mb (up to a kernel imposed limit, around 768Mb) for
passing the initrd to the kernel.  The presence of this option merely
indicates that your system does not have the old BIOS limitation.

This switch (or its abscence) is not passed to the kernel, and does not
in any way affect the
amount of physical memory which it will use.  (See the
kernel documentation for the kernel command line parameter
"mem=" for limiting the memory used by the kernel.)
.TP
.BI "lba32"
Generate 32-bit Logical Block Addresses instead of cylinder/head/sector 
addresses. If the BIOS supports packet addressing, then packet calls will be
used to access the disk. This allows booting from any partition on disks
with more than 1024 cylinders.
If the BIOS does not support packet addressing, then 'lba32' addresses are
translated to cylinder/head/sector ('geometric'), just as for 'linear'.
All floppy disk
references are retained in C:H:S form.  Use of 'lba32' is recommended on
all post-1998 systems.  Beginning with LILO version 22, 'lba32' is the
default disk addressing scheme.
.TP
.BI "linear"
Generate 24-bit linear sector addresses instead of cylinder/head/sector 
(geometric) addresses. Linear addresses are translated at run time to
geometric addresses, and are limited to cylinders <= 1023. When using
`linear' with large disks,
.I /sbin/lilo
may generate references to inaccessible disk cylinders. 'lba32' avoids
many of these pitfalls with its use of packet addressing, but requires a
recent BIOS (post-1998).
.TP
.BI "lock"
Enables automatic recording of boot command lines as the defaults 
for the following boots. This way, lilo "locks" on a choice until it is 
manually overridden.
.TP
.BI "mandatory"
The per-image password option `mandatory' (see below) applies to all images.
.TP
.BI "map=" <map-file>
Specifies the location of the map file. If `map' is omitted, the file
.I /boot/map
is used.

On machines with a pre-1998 BIOS, the EDD bios extensions which are required
to support "lba32" disk sector addressing may not be present. In this case,
the boot-loader will fall back automatically to "geometric" addressing; this
fall back situation, or the specific use of "geometric" or "linear"
addressing, will require the map file to be located within the first 1024
cylinders of the disk drive. This BIOS limitation is not present on
post-1998 systems, most of which support the newer EDD disk BIOS calls.
.TP
.BI "menu-title=" <title-string>
Specifies the title line (up to 37 characters) for the boot menu. This
title replaces the default "LILO Boot Menu" title string. If
.I boot-menu.b
is not installed as the boot loader (see
.I "install="
option), then this line has no effect.
.TP
.BI "menu-scheme=" <color-scheme>
The default color scheme of the boot menu may be overridden on VGA displays
using this option. (The color scheme of MDA displays is fixed.)
The general
.I color-scheme
string is of the form:
.sp
.nf
     <text>:<highlight>:<border>:<title>
.fi
.sp
where each entry is two characters which specify a
foreground color and a background color. Only the first entry is
required. The default highlight is the reverse of the text color; and the
default border and title colors are the text color.
Colors are specified using the characters \fBkbgcrmyw\fP, for blac\fBK\fP,
\fBB\fPlue, \fBG\fPreen, \fBC\fPyan, \fBR\fPed,
\fBM\fPagenta, \fBY\fPellow, and \fBW\fPhite: upper case for
intense (fg only), lower case for dim.
Legal color-scheme strings would be
.sp
.nf
    menu-scheme=Wm     intense white on magenta
    menu-scheme=wr:bw:wr:Yr    the LILO default
    menu-scheme=Yk:kw    bright yellow on black
.fi
.sp
If
.I "boot-menu.b"
is not installed as the boot loader, then this line has no effect.
.TP
.BI "message=" <message-file>
specifies a file containing a message that is displayed before
the boot prompt. No message is displayed while waiting 
for a shifting key after printing "LILO ". In the message, the FF
character ([Ctrl L]) clears the local screen. This is undesirable when
the \fIboot-menu.b\fP boot loader is installed. 
The size of the message 
file is limited to 65535 bytes. The map file has to be rebuilt if the 
message file is changed or moved.  'message=' and 'bitmap=' are mutually
exclusive.
.TP
.BI "nowarn"
Disables warnings about possible future dangers.
.TP
.BI "optional"
The per-image option `optional' (see below) applies to all images.
.TP
.BI "password=" <password>
The per-image option `password=...' (see below) applies to all images. This
option may prevent unattended booting, if the default image is `password='
protected at the default level `mandatory', which is a level higher than
`restricted'.
.TP
.BI "prompt"
Automatic booting (see `delay' above) will not take place unless a locked or
pre-stored ("lilo -R") command line is present. Instead, the boot
loader will issue the 
.I boot:
prompt and wait for user input before proceeding (see
.I timeout
below).
Unattended default image reboots are impossible if `prompt' is set
and `timeout' is not, or the default image is password protected at a higher
level than `restricted'.
.TP
.BI "raid-extra-boot=" <option>
This option only has meaning for RAID1 installations.
The <option> may be specified as \fInone\fP, \fIauto\fP, \fImbr-only\fP,
or a comma-separated list of devices; e.g., "/dev/hda,/dev/hdc6".  Starting
with LILO version 22.0, the boot record is normally written to the first
sector of the RAID1 device.  On PARALLEL raid sets, no other boot records
are needed.  The
default action is \fIauto\fP, meaning, automatically generate auxilary boot
records as needed on SKEWED raid sets.  \fInone\fP means
suppress generation of all auxiliary boot records. 
\fImbr-only\fP suppresses generation of boot records on the raid device,
and forces compatibility with versions of LILO earlier than version 22.0
by writing boot records to all Master Boot Records (MBRs) of all disks in
the raid set.
Use of an explicit list of devices, forces writing of auxiliary boot records
only on those devices enumerated, in addition to the boot record on the RAID1
device. Since the version 22 RAID1 codes will never automatically write a boot
record on the MBR of device 0x80, if such a boot record is desired, this is
the way to have it written.
.TP
.BI "restricted"
The per-image password option `restricted' (see below) applies to all images.
.TP
.BI "serial=" <parameters>
enables control from a serial line. The specified serial port is
initialized and the boot loader is accepting input from it and from 
the PC's keyboard. Sending a break on the serial line corresponds to 
pressing a shift key on the console in order to get the boot loader's
attention. 
All boot images should be password-protected if the serial access is 
less secure than access to the console, e.g. if the line is connected 
to a modem. The parameter string has the following syntax:
.sp
.nf
    <port>[,<bps>[<parity>[<bits>]]]
.fi
.sp
<port>:  the number of the serial port, zero-based. 0 corresponds to
COM1 alias /dev/ttyS0, etc. All four ports can be used (if present).
.sp
<bps>:  the baud rate of the serial port. The following baud rates are 
supported: 110, 150, 300, 600, 1200, 2400(default), 4800, 9600, plus the 
extended rates 19200, 38400, and 57600(56000).  115200 is allowed, but may
not work with all COMx port hardware.
.sp
<parity>:  the parity used on the serial line. The boot loader ignores input 
parity and strips the 8th bit. The following (upper or lower case) 
characters are used to describe the parity:  "n" for no parity, "e" 
for even parity and "o" for odd parity.
.sp
<bits>:  the number of bits in a character. Only 7 and 8 bits are 
supported. Default is 8 if parity is "none", 7 if parity is "even" 
or "odd". 
.sp
If `serial' is set, the value of `delay' is automatically raised to 20.
.sp
Example: "serial=0,2400n8" initializes COM1 with the default parameters.
.TP
.BI "single-key"
This option specifies that boot images or 'other's are to be selected and
launched with a single keystroke.  Selection is based upon the first
character of each name, which must be unique.  This option should not be
used with the menu or bitmap user interface ("install=").
.TP
.BI "suppress-boot-time-BIOS-data"
This global option suppresses the boot-time real mode collection of BIOS data
on systems which hang on certain BIOS calls.  It is equivalent to using the
boot-time switch 'nobd'.
.sp
This option defeats the disk volume recognition and BIOS device code
detection features of LILO on systems with more than one disk. Thus the use
of this option will produce a strong cautionary message,
which cannot be suppressed.
.TP
.BI "timeout=" <tsecs>
sets a timeout (in tenths of a second) for keyboard input at the 
.I boot:
prompt.  "timeout" only has meaning if "prompt" is mentioned.
If no key is pressed for the specified time, the default image is 
automatically booted. The default timeout is infinite.
.TP
.BI "verbose=" <number>
Turns on lots of progress reporting. Higher numbers give more verbose
output. If  \-v  is additionally specified on the lilo command line,
the level is increased accordingly. The maximum verbosity level is 5.
.TP
.BI "vmdefault=" <name>
The named boot image is used as the default boot if booting in "virtual"
mode with a virtual monitor, such as VMware(tm).  Thus a real mode boot and
a virtual mode boot can be made to have different default boot images.
.br

.LP
Additionally, the kernel configuration parameters
.BR append ", " ramdisk ", " read-only ", " read-write ", " root
and
.B vga
can be set in the global options section. They are used as defaults
if they aren't specified in the configuration sections of the
respective kernel images.

.SH "PER-IMAGE SECTION"
A per-image section starts with either a line
.sp
.nf
    \fBimage=\fP\fI<pathname>\fP
.fi
.sp
to indicate a file or device containing the boot image of a Linux
kernel, or a line
.sp
.nf