From this page you can add/remove/change boot password, time till booting default OS, and more!
Select the drive or partition where you would like to install the Lilo boot loader. Unless you intend to use other boot managers in addition to LILO, this should be the MBR (master boot record) of your boot drive. In this case, you should probably select /dev/hda if your drive is IDE, and /dev/sda if your boot drive is SCSI.
Lilo will wait the specified time before booting default kernel/OS.
Linear mode tells the boot loader the location of the kernels in linear addressing rather than sector/head/cylinder. Linear mode is required by some SCSI drives, and shouldn't hurt unless you are planning to create a boot disk to be used with other computers. See lilo man file for more details.
The compact mode trys to merge read requests for adjacent sectors in to single read request. This reduces load time and keeps boot map smaller, but will not work on all systems.
Automatic recording of boot command lines as defaults for following boots. This way, lilo "locks" on a choice until manually overridden.
A password is required only if any parameters changed (i.e. the user can boot linux, but not linux single or linux init=/bin/sh). This sets a default for all Linux kernels you want to boot. If you need a per-kernel setting, go to Operating Systems tab, and select details.
Enter the password for bootup (if any) here. If restricted (above) is checked, the password is required for additional parameters only.
The password is stored in clear text in /etc/lilo.conf. You'll want to make sure nobody untrusted can read this file. Also, you probably don't want to use your normal/root password here.
You can select the default graphics mode here. If you intend to use a VGA graphics mode, you must compile the kernel with support for frame buffer devices. The ask setting brings up a prompt at boot time. This sets a default for all Linux kernels you want to boot. If you need a per-kernel setting, go to Operating Systems tab, and select details.
If this box is checked, lilo goes to the lilo prompt whether or not a key is pressed. If it is turned off, lilo boots the default operating system unless shift is pushed (in that case, it goes to the lilo prompt).
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