Used with a single argument, inquire of active partition on device R master-device ; e.g., /dev/hda. With N==0, deactivate all partitions on the device. With N in the range [1..n], activate the specified partition and deactivate all others. Normally, only primary partitions [1..4] may be activated, but if the Extended Master Boot Loader is present on the Master Boot Record of the device (see the -M option), any partition may be made active. Whether the actual OS in the partition will boot from an extended partition depends on the characteristics of the OS. LILO boot records for Linux may be booted from an extended partition.

Specify the boot device; i.e., where the boot loader will be installed. "-b /dev/hda" specifies the Master Boot Record; "-b /dev/sdb5" specifies the first extended partition on the second SCSI disk.

Specify a bitmap file for the boot-time graphics screen, preferably one already pre-processed with the 'lilo -E' command.

Enable map compaction. This will merge read requests from adjacent sectors. Speeds up the booting (especially from floppy).

lilo Specify an alternate pathname for the configuration file. This option overrides the use of the default configuration file, R /etc/lilo.conf .

Specifies the delay time in tenths of a second (20 = 2 sec) before automatically booting the first image. Gives you time to interrupt the automatic boot process with Shift, Alt, Ctrl, ScrollLock, or CapsLock. If interrupted, the `boot:' prompt is displayed. This switch is overridden by the appearance of prompt in the configuration file.

Use the kernel with the given label, instead of the first one in the list, as the default kernel to boot.

If .ext is .bmp, then take the file to be a bitmap graphic file for use in the "bitmap=" configuration file directive. Enter an interactive editor to create or update the color/placement information in the bitmap file LILO header. (see 'bmp-colors', 'bmp-table', and 'bmp-timer' on the man page for 'lilo.conf(5)'.) If .ext is .dat, then take the file to be a configuration file which specifies bitmap graphic parameters, which are transferred into the LILO header in the bitmap file of the same name. When a .bmp file is modified using a graphics editor (e.g., GIMP), the LILO header will be lost. It can be restored using the .dat file, which is used as a text-based backup for the LILO header information.

Specify disk geometry parameter file. (The default is R /etc/disktab .)

Override boot sector check for filesystems (e.g., swap, XFS, ...) which might be destroyed by the installation of the LILO boot sector on the first sector of the partition. These filesystems use the first sector as a superblock. Compare with "-P ignore", which bypasses certain partition table checks.

Generate cylinder/head/sector (geometric) disk addresses. Limited to cylinders up to 1023. Forces compatibility with older versions of LILO.

Override fatal halt when a RAID array does not have all disks active.

Specify a file to be used as the new boot loader. (The default is R /boot/boot.b .)

label is taken to be the name of an image specified in the configuration file. This command will print the path name of the corresponding kernel file, keytable file, initial ramdisk file, root specification, or "append=" string ("i", "k", "r", "R", or "a" option). The "D" option ignores the label parameter, and prints the default "image=" label, or first "image=" label if no default I image is specified.

Generate 24-bit linear sector addresses instead of cylinder/head/sector addresses.

Generate 32-bit Logical Block Addresses instead of cylinder/head/sector addresses, allowing access to all partitions on disks with more than 1024 cylinders.

Use specified map file instead of the default.

Install a Master Boot Record on the device specified as R master-device , selecting the Standard or Extended Master Boot Loader per the option. The primary partition table on master-device is undisturbed. If no valid Volume-ID (serial number) is present, then generate one and write it to the MBR. If mbr is specified, the Standard Master Boot Loader will search partitions 1-4 for an active flag, and boot the flagged partition. Only one active flag is allowed. If ext is specified, the search for an active partition will include extended partitions as well. The presence of the Extended Master Boot Loader on the Master Boot Record (MBR = sector 0) of a disk affects the operation of the -A option.

Require interactive entry of all passwords specified as in the configuration file.

Fix or ignore `corrupt' partition tables, i.e., partition tables with linear and cylinder/head/sector addresses that do not correspond. Always try -P ignore first, as -P fix will re-write the partition table, possibly destroying all partitions on the disk. -P ignore is also used to bypass the partition table check for partition types within the partition table which might not allow the installation of a LILO boot sector. Compare with the "-F" flag, which overrides the check of the actual boot sector. -P <global-option> allows the passing of any global option which may appear in the global section (top) of the configuration file (/etc/lilo.conf). For instance, -P nowarn will pass the "nowarn" option, just as though "nowarn" appeared in the configuration file (same as the "-w" switch). Similarly, -P timeout=50 will add or override the "timeout=" line in the configuration file. Note that the general -P switch actually duplicates a number of command line option switches. However, it is not strictly the same as some switches whick cause an override of other options; e.g., "-g" (-P geometric), "-L" (-P lba32).

List the currently mapped files. lilo maintains a file, by default R /boot/map , containing the name and location of the kernel(s) to boot. This option will list the names therein. Use with -v for more detailed information about the installed boot loader.

Before doing anything else, do a chroot to the indicated directory. The new root directory must contain a /dev directory, and may need a /boot directory. It may also need an R /etc/lilo.conf file.

This option sets the default command for the boot loader the next time it executes. The boot loader will then erase this line: this is a once-only command. It is typically used in reboot scripts, just before calling `shutdown -r'. Used without any arguments, it will cancel a lock-ed or fallback command line.

When lilo writes a new boot sector, it preserves the former contents of the sector in a file, named by default /boot/boot.NNNN, where NNNN is the hexadecimal representation of the major and minor device numbers of the drive/partition. This option specifies the backup save file in one of three ways: a save directory (default is '/boot') using the default filename 'boot.NNNN' in the specified directory; a pathname template to which '.NNNN' is appended (default would be '/boot/boot'); or the full pathname of the file, which must include the correct '.NNNN' suffix. When used with the -u option, the full file pathname must be specified.

Normally, lilo will not overwrite an existing boot sector save file. This options says that overwriting is to be forced. As with -s, the specification may be of a save directory, pathname template, or full pathname (which includes the '.NNNN' suffix.)

Test only. Do not really write a new boot sector or map file. Use together with -v to find out what lilo is about to do.

Print out system information, some of it extracted from the system bios. This is more convenient than booting the LILO diagnostic floppy on problem systems. option may be any one of the following:

Uninstall lilo by copying the saved boot sector back. The '-s' and '-C' switches may be used with this option. The device-name is optional. A time-stamp is checked.

Idem, but do not check the time-stamp.

Increase verbosity. Giving one to five -v options will make lilo more verbose, or use, -v n (n=1..5) to set verbosity level 'n'.

Print version number.

Used as -w or -w-, suppress warning messages. Used as -w+, override nowarn in the configuration file, and show warning messages.

For RAID installations only. The option may be any of the keywords R none , R auto , R mbr , R mbr-only , or a comma separated list of additional boot devices (no spaces allowed in the list).

Reserved for LILO internal use. May produce different output for different LILO versions. The line beginning "CFLAGS=" will contain the compiler options used to generate this version of LILO.

When used with the -M switch, clears the Volume-ID. Usually used in the following sequence to generate a new Volume-ID:

     lilo -z -M /dev/hda
     lilo -M /dev/hda

Tells the boot installer whether special precautions need to be taken because the BIOS fails to pass the correct device code in DL (-Z0). Or may specify that the BIOS always gets DL right (-Z1). Corresponds to, and overrides, the configuration file option 'bios-passes-dl='.

Locks the command line, as though 'lock' had been specified in 'lilo.conf.'

Specifies the maximum memory in the system in bytes, kilobytes, megabytes, or gigabytes. This option is not removed from the command line, and is always passed to the kernel.

Suppresses the BIOS data check. This option is reserved for use with non-IBM-compliant BIOS's which hang with the lines:

     Loading...............
     BIOS data check 

Allows overriding the default video mode upon kernel startup.