Edit boot options?

ragnar86 · 03-11-2005, 02:56 AM

Hi,

im running Redhat9, everything works fine but i have a question:

When my comp is booting, i get this screen where i have to choose which kernel i want to use. There are two entries. One doesnt work correct, so i want to get rid of the entry. How can i do that?
And how can i change the time i have to wait, before it continues booting? It is currently set to 10 secounds, but i want to set it to 3 secs.

Sorry for my bad English :-(

But thanks for your help!

harken · 03-11-2005, 03:02 AM

What bootloader are you using? GrUB, LILO?
If it's GrUB, simply delete the entry in /boot/grub/menu.lst (the part from "title" to "boot") and change the value after the "timeout" entry.
Don't know for sure in LILO but it should be similar.

J.W. · 03-11-2005, 03:10 AM

lilo is very similar. Edit the lilo.conf file (in the /etc directory), and remove the section referencing the kernel that you don't want. It may look something like this

Code:

image = /boot/kernel-2.6.5
    label = SuSE-2.6.5
    initrd = /boot/initrd-2.6.5
    root = /dev/hda5
    vga = 0x317
    append = "hdc=ide-scsi hde=none hdg=none"

Just delete it. As for the timeout parameter, the value is measured in tenths of a second (eg, 10 seconds = 100). If you want to change it to 3 seconds, change this line "timeout = 100" to "timeout = 30" (no quotes).

Note that in order for your changes to take effect, you need to rerun the lilo program. As root, run

Code:

/sbin/lilo

Then reboot to verify that your changes worked. Good luck with it -- J.W.

ragnar86 · 03-11-2005, 03:22 AM

oh sorry, i forgot to mention i have Grub.
But it worked wonderful, thanks both of you for your quick response!

reddazz · 03-11-2005, 03:45 AM

Removing the old kernel will also remove its grub entry. to do this, you would do

$rpm -qa | grep -i kernel
#rpm -e kernel-version

Off course, you will only do this if you know you have no need for the old kernel.